Anthony Kovscek

All Publications

• Optimizing Injection Well Trajectory to Maximize CO₂ Storage Security and Minimize Geomechanical Risk SPE JOURNAL Li, Y., Oneal, R., Whitezell, M., Kovscek, A. R. 2024; 29 (11): 6547-6562

  View details for Web of Science ID 001358183500002

• In-situ study of CO2-saturated 2-saturated brine reactive transport in carbonates considering the efficiency of wormhole propagation ADVANCES IN WATER RESOURCES Aljawad, M., Kim, T., Al Shafloot, T., Kovscek, A. R. 2024; 192

  View details for DOI 10.1016/j.advwatres.2024.104792

  View details for Web of Science ID 001301267500001

• Scale translation yields insights into gas adsorption under nanoconfinement PHYSICS OF FLUIDS Liu, L., Froute, L., Kovscek, A. R., Aryana, S. A. 2024; 36 (7)

  View details for DOI 10.1063/5.0212423

  View details for Web of Science ID 001271335900004

• Assessment of hydrogen storage potential in depleted gas fields and power-to-hydrogen conversion efficiency: A northern California case study INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Okoroafor, E. R., Nazari, N., Kim, T. W., Watkins, H. Y., Saltzer, S. D., Kovscek, A. R. 2024; 71: 982-998

  View details for DOI 10.1016/j.ijhydene.2024.05.239

  View details for Web of Science ID 001245954300001

• Criteria and workflow for selecting saline formations for carbon storage INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Callas, C., Davis, J., Saltzer, S. D., Hashemi, S. S., Wen, G., Gold, P. O., Zoback, M. D., Benson, S. M., Kovscek, A. R. 2024; 135

  View details for DOI 10.1016/j.ijggc.2024.104138

  View details for Web of Science ID 001296471500001

• The 11th Society of Petroleum Engineers Comparative Solution Project Problem Definition SPE JOURNAL Nordbotten, J. M., Ferno, M. A., Flemisch, B., Kovscek, A. R., Lie, K. 2024; 29 (5): 2507-2524

  View details for Web of Science ID 001239664700001

• Molecular Assessment of Storage Capacity and Enthalpy of Adsorption in Organic-Rich Shale Gas Reservoirs ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING Afagwu, C., Glatz, G., Alafnan, S., Raza, A., Mahmoud, M. A., Sultan, A., Kovscek, A. R. 2024

  View details for DOI 10.1007/s13369-024-08889-8

  View details for Web of Science ID 001190501900003

• A Methodology for Fueling Mobility Markets with Hydrogen from Natural Gas plus Carbon Capture and Sequestration INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Okoroafor, E. R., Bracci, J., Boness, N. L., Saltzer, S. D., Shrimali, G., Hennessy, E. M., Kim, T., Seamon, A., Benson, S. M., Zoback, M. D., Kovscek, A. R. 2024; 133

  View details for DOI 10.1016/j.ijggc.2024.104095

  View details for Web of Science ID 001188214200001

• In Situ pH Measurement in Microfluidic Porous Media Indicated by Surfaces Functionalized with Polyaniline (PAni) COLLOIDS AND INTERFACES Zhang, G., Nazari, N., Kovscek, A. R. 2024; 8 (1)

  View details for DOI 10.3390/colloids8010009

  View details for Web of Science ID 001172074400001

• Scaling Up FluidFlower Results for Carbon Dioxide Storage in Geological Media TRANSPORT IN POROUS MEDIA Kovscek, A. R., Nordbotten, J. M., Ferno, M. A. 2024

  View details for DOI 10.1007/s11242-023-02046-9

  View details for Web of Science ID 001140996800001

• Coupled Transport, Reactivity, and Mechanics in Fractured Shale Caprocks WATER RESOURCES RESEARCH Murugesu, M. P., Vega, B., Ross, C. M., Kurotori, T., Druhan, J. L., Kovscek, A. R. 2024; 60 (1)

  View details for DOI 10.1029/2023WR035482

  View details for Web of Science ID 001144200500001

• Induced Seismicity Hazard Assessment for a Potential CO₂ Storage Site in the Southern San Joaquin Basin, CA GEOHAZARDS Kohli, A., Li, Y., Kim, T., Kovscek, A. R. 2023; 4 (4): 421-436

  View details for DOI 10.3390/geohazards4040024

  View details for Web of Science ID 001187541100001

• Evaluation of Electron Tomography Capabilities for Shale Imaging. Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada Frouté, L., Boigné, E., Jolivet, I. C., Chaput, E., Creux, P., Ihme, M., Kovscek, A. R. 2023

  Abstract

  Despite the advantageous resolution of electron tomography (ET), reconstruction of three-dimensional (3D) images from multiple two-dimensional (2D) projections presents several challenges, including small signal-to-noise ratios, and a limited projection range. This study evaluates the capabilities of ET for thin sections of shale, a complex nanoporous medium. A numerical phantom with 1.24 nm pixel size is constructed based on the tomographic reconstruction of a Barnett shale. A dataset of 2D projection images is numerically generated from the 3D phantom and studied over a range of conditions. First, common reconstruction techniques are used to reconstruct the shale structure. The reconstruction uncertainty is quantified by comparing overall values of storage and transport metrics, as well as the misclassification of pore voxels compared to the phantom. We then select the most robust reconstruction technique and we vary the acquisition conditions to quantify the effect of artifacts. We find a strong agreement for large pores over the different acquisition workflows, while a wider variability exists for nanometer-scale features. The limited projection range and reconstruction are identified as the main experimental bottlenecks, thereby suggesting that sample thinning, advanced holders, and advanced reconstruction algorithms offer opportunities for improvement.

  View details for DOI 10.1093/micmic/ozad106

  View details for PubMedID 37942573

• Assessing the impact of dip angle on carbon storage in saline reservoirs to aid site selection INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Callas, C., Kovscek, A. R., Benson, S. M. 2023; 129

  View details for DOI 10.1016/j.ijggc.2023.103966

  View details for Web of Science ID 001106663500001

• Core-scale numerical simulation and comparison of breakdown of shale and resulting fractures using sc-CO2 and water as injectants GAS SCIENCE AND ENGINEERING Yang, J., Tchelepi, H. A., Kovscek, A. R. 2023; 118

  View details for DOI 10.1016/j.jgsce.2023.205109

  View details for Web of Science ID 001165447500001

• Assessing the impact of dip angle on carbon storage in saline reservoirs to aid site selection INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Callas, C., Kovscek, A. R., Benson, S. M. 2023; 129

  View details for Web of Science ID 001106663500002

• Intercomparison of numerical simulation models for hydrogen storage in porous media using different codes ENERGY CONVERSION AND MANAGEMENT Okoroafor, E., Sampaio, L., Gasanzade, F., Claro, Y., Zhou, J. D., Saltzer, S. D., Bauer, S., Kovscek, A. R. 2023; 292

  View details for DOI 10.1016/j.enconman.2023.117409

  View details for Web of Science ID 001054997100001

• Analysis of gas storage and transport in Eagle Ford shale using pressure pulse decay measurements with He, Kr and CO2 GEOENERGY SCIENCE AND ENGINEERING Lyu, Y., Elkady, Y., Kovscek, A. R., Jessen, K. 2023; 228

  View details for DOI 10.1016/j.geoen.2023.211951

  View details for Web of Science ID 001059688600001

• Scoring, ranking, and technoeconomics of carbon capture and storage opportunities in the central valley of California INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Kim, T., Yaw, S., Kovscek, A. R. 2023; 128

  View details for DOI 10.1016/j.ijggc.2023.103968

  View details for Web of Science ID 001086235700001

• Micro X-ray fluorescence reveals pore space details and spatially-resolved porosity of rock-based microfluidic devices. Lab on a chip Froute, L., Guan, K. M., Yun, W., Lewis, S. J., Stripe, B. D., Yang, X., Lapene, A., Kovscek, A. R., Creux, P. 2023

  Abstract

  Characterization of microscopic details of the fabric of mudstones and shales (i.e., structure and composition) is important to understand their storage and transport properties. Current characterization methods struggle to probe reliably multiple scales of interest (e.g., pore and fracture) and measure properties at the finest resolution under representative in situ conditions. Micro X-ray fluorescence (muXRF) is a high-performance imaging technique that produces elemental images at sub-10 mum spatial resolution and could offer insight into a diversity of shale properties, such as mineral composition, porosity, and in situ pressure gradients. This study designed and carried out a porosity mapping protocol using model and real-rock microfluidic devices and contrast fluids. Etched silicon micromodels with real-rock pore network patterns served as ideal models to establish a proof of concept. Measurements were performed on a novel muXRF microscope not powered by synchrotron radiation. We registered the muXRF datasets with the binary rock masks used for micromodel fabrication and applied segmentation algorithms to compare porosities. We assessed expected advantages and limitations through a sensitivity analysis and beam study. muXRF is an important new imaging technique for microfluidic applications.

  View details for DOI 10.1039/d3lc00394a

  View details for PubMedID 37591813

• Environmental impact of solution pH on the formation and migration of iron colloids in deep subsurface energy systems. The Science of the total environment Spielman-Sun, E., Bland, G., Wielinski, J., Frouté, L., Kovscek, A. R., Lowry, G. V., Bargar, J. R., Noël, V. 2023: 166409

  Abstract

  Deep subsurface stimulation processes often promote fluid-rock interactions that can lead to the formation of small colloidal particles that are suspected to migrate through the rock matrix, partially or fully clog pores and microfractures, and promote the mobilization of contaminants. Thus, the goal of this work is to understand the geochemical changes of the host rock in response to reservoir stimulation that promote the formation and migration of colloids. Two different carbonate-rich shales were exposed to different solution pHs (pH = 2 and 7). Iron and other mineral transformations at the shale-fluid interface were first characterized by synchrotron-based XRF mapping. Then, colloids that were able to migrate from the shale into the bulk fluid were characterized by synchrotron-based extended X-ray absorption structure (EXAFS), scanning electron microscopy (SEM), and single-particle inductively coupled plasma time-of-flight mass spectrometry (sp-icpTOF-MS). When exposed to the pH = 2 solution, extensive mineral dissolution and secondary precipitation was observed; iron-(oxyhydr)oxide colloids colocated with silicates were observed by SEM at the fluid-shale interfaces, and the mobilization of chromium and nickel with these iron colloids into the bulk fluid was detected by sp-icpTOF-MS. Iron EXAFS spectra of the solution at the shale-fluid interface suggests the rapid (within minutes) formation of ferrihydrite-like nanoparticles. Thus, we demonstrate that the pH neutralization promotes the mobilization of existing silicate minerals and the rapid formation of new iron colloids. These Fe colloids have the potential to migrate through the shale matrix and mobilize other heavy metals (such as Cr and Ni, in this study) and impacting groundwater quality, as well produced waters from these hydraulic fracturing operations.

  View details for DOI 10.1016/j.scitotenv.2023.166409

  View details for PubMedID 37597537

• Quantification of the Impact of Acidified Brine on Fracture-Matrix Transport in a Naturally Fractured Shale Using in Situ Imaging and Modeling ENERGY & FUELS Zahasky, C., Murugesu, M., Kurotori, T., Sutton, C., Druhan, J. L., Vega, B., Benson, S. M., Kovscek, A. R. 2023

  View details for DOI 10.1021/acs.energyfuels.3c01463

  View details for Web of Science ID 001040507200001

• Flow characteristics and regime transition of aqueous foams in porous media over a wide range of quality, velocity, and surfactant concentration PETROLEUM SCIENCE Li, B., Zhang, M., Li, Z., Kovscek, A., Xin, Y., Li, B. 2023; 20 (2): 1044-1052

  View details for DOI 10.1016/j.petsci.2022.11.014

  View details for Web of Science ID 000994772700001

• Comparative Analysis of Imaging and Measurements of Micrometer-Scale Fracture Aperture Fields Within a Heterogeneous Rock Using PET and X-ray CT TRANSPORT IN POROUS MEDIA Kurotori, T., Zahasky, C., Gran, M., Kovscek, A. R., Benson, S. M. 2023

  View details for DOI 10.1007/s11242-023-01922-8

  View details for Web of Science ID 000943631800001

• Pore-scale study of microbial hydrogen consumption and wettability alteration during underground hydrogen storage FRONTIERS IN ENERGY RESEARCH Liu, N., Kovscek, A. R., Ferno, M. A., Dopffel, N. 2023; 11

  View details for DOI 10.3389/fenrg.2023.1124621

  View details for Web of Science ID 000935958400001

• The motion of long bubbles in microchannels using a meter-long, rectangular capillary on a chip. Journal of colloid and interface science Nazari, N., Yun, W., Kovscek, A. R. 2023; 638: 149-160

  Abstract

  HYPOTHESIS: The dynamics of gas-liquid interfaces differs between aqueous surfactant and nanoparticle mixtures in rectangular cross-section capillaries.EXPERIMENTS: We designed and fabricated a new microfluidic device with a meter-long channel and a noncircular cross section (35mum by 100mum by 1 m) to study the flow behavior of long bubbles in capillaries wetted by water as well as surfactant and nanoparticle solutions. Flow in the novel symmetric loop device maintains essentially straight and inertialess conditions over a wide range of flow rates.FINDINGS: The pressure-drop versus velocity relationship of long bubbles in capillaries with noncircular cross sections has been studied theoretically but not extensively validated. The measured pressure drop (normalized with respect to interfacial properties) experienced by bubbles varies as Ca2/3 over the range 10-7

  View details for DOI 10.1016/j.jcis.2023.01.073

  View details for PubMedID 36736116

• Multimodal study of the impact of stimulation pH on shale pore structure, with an emphasis on organics behavior in alkaline environments FUEL Medina-Rodriguez, B. X., Frout, L., Alvarado, V., Kovscek, A. R. 2023; 331

  View details for DOI 10.1016/j.fuel.2022.125649

  View details for Web of Science ID 000859556900003

• Mixed imbibition controls the advance of wetting fluid in multiscale geological media Advances in Water Resources Kurotori, T., Murugesu, M. P., Zahasky, C., Vega, B., Druhan, J. L., Benson, S. M., Kovscek, A. R. 2023

  View details for DOI 10.1016/j.advwatres.2023.104429

• Effects of Supercritical CO2 Injection on the Shale Pore Structures and Mass Transport Rates ENERGY & FUELS Medina, B. X., Kohli, A., Kovscek, A. R., Alvarado, V. 2022

  View details for DOI 10.1021/acs.energyfuels.2c02254

  View details for Web of Science ID 000906441200001

• Dynamic development of geochemical reaction fronts during hydraulic stimulation of shale APPLIED GEOCHEMISTRY Noel, V., Druhan, J. L., Gundogar, A., Kovscek, A. R., Brown Jr, G. E., Bargar, J. R. 2023; 148

  View details for DOI 10.1016/j.apgeochem.2022.105542

  View details for Web of Science ID 000913925600001

• Criteria and workflow for selecting depleted hydrocarbon reservoirs for carbon storage APPLIED ENERGY Callas, C., Saltzer, S. D., Davis, J., Hashemi, S. S., Kovscek, A. R., Okoroafor, E. R., Wen, G., Zoback, M. D., Benson, S. M. 2022; 324

  View details for DOI 10.1016/j.apenergy.2022.119668

  View details for Web of Science ID 000841967400010

• Toward underground hydrogen storage in porous media: Reservoir engineering insights INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Okoroafor, E., Saltzer, S. D., Kovscek, A. R. 2022; 47 (79): 33781-33802

  View details for DOI 10.1016/j.ijhydene.2022.07.239

  View details for Web of Science ID 000865018500004

• Pore level foam generation in the presence of residual oil in porous media FUEL Almajid, M. M., Kovscek, A. R. 2022; 324

  View details for DOI 10.1016/j.fuel.2022.124568

  View details for Web of Science ID 000809897800007

• A micro-scale rheometer to study foam texture and flow resistance in planar fractures. Lab on a chip Nazari, N., Kovscek, A. R. 2022

  Abstract

  We designed and fabricated a new microfluidic device to better enable study of foam microstructure and rheology in planar fractures. The design phase included stress-strain finite element analysis to enhance the pressure tolerance of the device. The optimized design is a 2 cm wide by 7.75 cm long rough fracture that includes 25 posts to anchor the glass cover plate. The posts simulate asperities and provide structural support during bonding of a glass cover plate to the device. Importantly, the new design illustrates improved ability to sustain large differential pressure compared to previous designs in the literature. The rheometer permits study of the relationship among foam bubble morphology, pressure drop, and flow rates. Our findings validated the previous, sparse microvisual studies mentioned in the literature and confirmed that small quality foam, ranging from 20 to 50% gas by volume, contains dispersed bubbles separated by liquid lenses. In this range, the distribution of bubble sizes was roughly 80-90% small uniform bubbles and only 10-20% of larger and more elongated bubbles. Additionally, our studies reveal that foam apparent viscosity is a strong function of foam quality, velocity, and texture (i.e., bubble size). Apparent viscosity of foam ranged from 100 to 600 cP for the conditions studied. High quality foams in fractures are independent of gas flow rates but very sensitive to liquid flow rates. On the other hand, low quality foams are sensitive to gas flow rates but independent of liquid flow rates.

  View details for DOI 10.1039/d2lc00595f

  View details for PubMedID 35959658

• Probing multiscale dissolution dynamics in natural rocks through microfluidics and compositional analysis. Proceedings of the National Academy of Sciences of the United States of America Ling, B., Sodwatana, M., Kohli, A., Ross, C. M., Jew, A., Kovscek, A. R., Battiato, I. 2022; 119 (32): e2122520119

  Abstract

  Mineral dissolution significantly impacts many geological systems. Carbon released by diagenesis, carbon sequestration, and acid injection are examples where geochemical reactions, fluid flow, and solute transport are strongly coupled. The complexity in these systems involves interplay between various mechanisms that operate at timescales ranging from microseconds to years. Current experimental techniques characterize dissolution processes using static images that are acquired with long measurement times and/or low spatial resolution. These limitations prevent direct observation of how dissolution reactions progress within an intact rock with spatially heterogeneous mineralogy and morphology. We utilize microfluidic cells embedded with thin rock samples to visualize dissolution with significant temporal resolution (100 ms) in a large observation window (3 × 3 mm). We injected acidic fluid into eight shale samples ranging from 8 to 86 wt % carbonate. The pre- and postreaction microstructures are characterized at the scale of pores (0.1 to 1 µm) and fractures (1 to 1,000 µm). We observe that nonreactive particle exposure, fracture morphology, and loss of rock strength are strongly dependent on both the relative volume of reactive grains and their distribution. Time-resolved images of the rock unveil the spatiotemporal dynamics of dissolution, including two-phase flow effects in real time and illustrate the changes in the fracture interface across the range of compositions. Moreover, the dynamical data provide an approach for characterizing reactivity parameters of natural heterogeneous samples when porous media effects are not negligible. The platform and workflow provide real-time characterization of geochemical reactions and inform various subsurface engineering processes.

  View details for DOI 10.1073/pnas.2122520119

  View details for PubMedID 35921438

• Long-term permeability evolution of shale seal rocks with argon and scCO(2) JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING Karnali-Asl, A., Kovscek, A. R., Zoback, M. D. 2022; 104

  View details for DOI 10.1016/j.jngse.2022.104642

  View details for Web of Science ID 000822680800002

• Optimization and uncertainty quantification of in situ combustion chemical reaction models FUEL Anderson, T. I., Kovscek, A. R. 2022; 319

  View details for DOI 10.1016/j.fuel.2022.123683

  View details for Web of Science ID 000783213900008

• Chemical and Reactive Transport Processes Associated with Hydraulic Fracturing of Unconventional Oil/Gas Shales. Chemical reviews Jew, A. D., Druhan, J. L., Ihme, M., Kovscek, A. R., Battiato, I., Kaszuba, J. P., Bargar, J. R., Brown, G. E. 2022

  Abstract

  Hydraulic fracturing of unconventional oil/gas shales has changed the energy landscape of the U.S. Recovery of hydrocarbons from tight, hydraulically fractured shales is a highly inefficient process, with estimated recoveries of <25% for natural gas and <5% for oil. This review focuses on the complex chemical interactions of additives in hydraulic fracturing fluid (HFF) with minerals and organic matter in oil/gas shales. These interactions are intended to increase hydrocarbon recovery by increasing porosities and permeabilities of tight shales. However, fluid-shale interactions result in the dissolution of shale minerals and the release and transport of chemical components. They also result in mineral precipitation in the shale matrix, which can reduce permeability, porosity, and hydrocarbon recovery. Competition between mineral dissolution and mineral precipitation processes influences the amounts of oil and gas recovered. We review the temporal/spatial origins and distribution of unconventional oil/gas shales from mudstones and shales, followed by discussion of their global and U.S. distributions and compositional differences from different U.S. sedimentary basins. We discuss the major types of chemical additives in HFF with their intended purposes, including drilling muds. Fracture distribution, porosity, permeability, and the identity and molecular-level speciation of minerals and organic matter in oil/gas shales throughout the hydraulic fracturing process are discussed. Also discussed are analysis methods used in characterizing oil/gas shales before and after hydraulic fracturing, including permeametry and porosimetry measurements, X-ray diffraction/Rietveld refinement, X-ray computed tomography, scanning/transmission electron microscopy, and laboratory- and synchrotron-based imaging/spectroscopic methods. Reactive transport and spatial scaling are discussed in some detail in order to relate fundamental molecular-scale processes to fluid transport. Our review concludes with a discussion of potential environmental impacts of hydraulic fracturing and important knowledge gaps that must be bridged to achieve improved mechanistic understanding of fluid transport in oil/gas shales.

  View details for DOI 10.1021/acs.chemrev.1c00504

  View details for PubMedID 35404590

• Mechanistic modeling and measurement of foamed gas flow resistance in fractures ADVANCES IN WATER RESOURCES Nazari, N., Almajid, M. M., Kovscek, A. R. 2022; 162

  View details for DOI 10.1016/j.advwatres.2022.104154

  View details for Web of Science ID 000788071600005

• Analysis and comparison of in-situ combustion chemical reaction models FUEL Anderson, T., Kovscek, A. R. 2022; 311

  View details for DOI 10.1016/j.fuel.2021.122599

  View details for Web of Science ID 000743152800002

• Assessment of oil and gas fields in California as potential CO2 storage sites INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Kim, T., Callas, C., Saltzer, S. D., Kovscek, A. R. 2022; 114

  View details for DOI 10.1016/j.ijggc.2022.103579

  View details for Web of Science ID 000776040000001

• Fractal Characterization of Multimodal, Multiscale Images of Shale Rock Fracture Networks ENERGIES Vega, B., Kovscek, A. R. 2022; 15 (3)

  View details for DOI 10.3390/en15031012

  View details for Web of Science ID 000757211600001

• Pore-scale bubble population dynamics of CO2-foam at reservoir pressure INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Benali, B., Foyen, T. L., Alcorn, Z., Haugen, M., Gauteplass, J., Kovscek, A. R., Ferno, M. A. 2022; 114

  View details for DOI 10.1016/j.ijggc.2022.103607

  View details for Web of Science ID 000777546100003

• Striving to translate shale physics across ten orders of magnitude: What have we learned? EARTH-SCIENCE REVIEWS Mehmani, Y., Anderson, T., Wang, Y., Aryana, S. A., Battiato, I., Tchelepi, H. A., Kovscek, A. R. 2021; 223

  View details for DOI 10.1016/j.earscirev.2021.103848

  View details for Web of Science ID 000721681900001

• Reconstructing porous media using generative flow networks COMPUTERS & GEOSCIENCES Guan, K. M., Anderson, T. I., Creux, P., Kovscek, A. R. 2021; 156

  View details for DOI 10.1016/j.cageo.2021.104905

  View details for Web of Science ID 000693555300006

• 2D-to-3D image translation of complex nanoporous volumes using generative networks. Scientific reports Anderson, T. I., Vega, B., McKinzie, J., Aryana, S. A., Kovscek, A. R. 2021; 11 (1): 20768

  Abstract

  Image-based characterization offers a powerful approach to studying geological porous media at the nanoscale and images are critical to understanding reactive transport mechanisms in reservoirs relevant to energy and sustainability technologies such as carbon sequestration, subsurface hydrogen storage, and natural gas recovery. Nanoimaging presents a trade off, however, between higher-contrast sample-destructive and lower-contrast sample-preserving imaging modalities. Furthermore, high-contrast imaging modalities often acquire only 2D images, while 3D volumes are needed to characterize fully a source rock sample. In this work, we present deep learning image translation models to predict high-contrast focused ion beam-scanning electron microscopy (FIB-SEM) image volumes from transmission X-ray microscopy (TXM) images when only 2D paired training data is available. We introduce a regularization method for improving 3D volume generation from 2D-to-2D deep learning image models and apply this approach to translate 3D TXM volumes to FIB-SEM fidelity. We then segment a predicted FIB-SEM volume into a flow simulation domain and calculate the sample apparent permeability using a lattice Boltzmann method (LBM) technique. Results show that our image translation approach produces simulation domains suitable for flow visualization and allows for accurate characterization of petrophysical properties from non-destructive imaging data.

  View details for DOI 10.1038/s41598-021-00080-5

  View details for PubMedID 34675247

• Pore-merging methodology for reactive transport and mineral dissolution in pore-network models ADVANCES IN WATER RESOURCES Esteves, B. F., Lage, P. C., Couto, P., Kovscek, A. R. 2021; 155

  View details for DOI 10.1016/j.advwatres.2021.104014

  View details for Web of Science ID 000698509000003

• In-Situ Combustion Frontal Stability Analysis SPE JOURNAL Zhu, Z., Liu, Y., Liu, C., Kovscek, A. 2021; 26 (4): 2271-2286

  View details for DOI 10.2118/195318-PA

  View details for Web of Science ID 000700523200037

• Multiphysics Investigation of Geochemical Alterations in Marcellus Shale Using Reactive Core-Floods ENERGY & FUELS Gundogar, A. S., Ross, C. M., Jew, A. D., Bargar, J. R., Kovscek, A. R. 2021; 35 (13): 10733-10745

  View details for DOI 10.1021/acs.energyfuels.1c00588

  View details for Web of Science ID 000670646600031

• Multimodal Visualization of Vaca Muerta Shale Fabric Before and After Maturation ENERGY & FUELS Guan, K. M., Ross, C. M., Kovscek, A. R. 2021; 35 (11): 9550-9560

  View details for DOI 10.1021/acs.energyfuels.1c00037

  View details for Web of Science ID 000661109900034

• Mechanistic foam flow model with variable flowing foam fraction and its implementation using automatic differentiation ADVANCES IN WATER RESOURCES Almajid, M. M., Wong, Z., Kovscek, A. R. 2021; 150

  View details for DOI 10.1016/j.advwatres.2021.103877

  View details for Web of Science ID 000634108200006

• Phase-field modeling of rate-dependent fluid-driven fracture initiation and propagation INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS Yang, J., Tchelepi, H. A., Kovscek, A. R. 2021

  View details for DOI 10.1002/nag.3190

  View details for Web of Science ID 000613319800001

• A Critical Review of the Physicochemical Impacts of Water Chemistry on Shale in Hydraulic Fracturing Systems. Environmental science & technology Khan, H. J., Spielman-Sun, E., Jew, A. D., Bargar, J., Kovscek, A., Druhan, J. L. 2021

  Abstract

  Hydraulic fracturing of unconventional hydrocarbon resources involves the sequential injection of a high-pressure, particle-laden fluid with varying pH's to make commercial production viable in low permeability rocks. This process both requires and produces extraordinary volumes of water. The water used for hydraulic fracturing is typically fresh, whereas "flowback" water is typically saline with a variety of additives which complicate safe disposal. As production operations continue to expand, there is an increasing interest in treating and reusing this high-salinity produced water for further fracturing. Here we review the relevant transport and geochemical properties of shales, and critically analyze the impact of water chemistry (including produced water) on these properties. We discuss five major geochemical mechanisms that are prominently involved in the temporal and spatial evolution of fractures during the stimulation and production phase: shale softening, mineral dissolution, mineral precipitation, fines migration, and wettability alteration. A higher salinity fluid creates both benefits and complications in controlling these mechanisms. For example, higher salinity fluid inhibits clay dispersion, but simultaneously requires more additives to achieve appropriate viscosity for proppant emplacement. In total this review highlights the nuances of enhanced hydrogeochemical shale stimulation in relation to the choice of fracturing fluid chemistry.

  View details for DOI 10.1021/acs.est.0c04901

  View details for PubMedID 33428391

• RockFlow: Fast Generation of Synthetic Source Rock Images Using Generative Flow Models ENERGIES Anderson, T. I., Guan, K. M., Vega, B., Aryana, S. A., Kovscek, A. R. 2020; 13 (24)

  View details for DOI 10.3390/en13246571

  View details for Web of Science ID 000602817200001

• Multimodal imaging and machine learning to enhance microscope images of shale COMPUTERS & GEOSCIENCES Anderson, T., Vega, B., Kovscek, A. R. 2020; 145

  View details for DOI 10.1016/j.cageo.2020.104593

  View details for Web of Science ID 000587352100006

• A Critical Review of the Role of Thin Liquid Films for Modified Salinity Brine Recovery Processes CURRENT OPINION IN COLLOID & INTERFACE SCIENCE Guo, H., Nazari, N., Esmaeilzadeh, S., Kovscek, A. R. 2020; 50

  View details for DOI 10.1016/j.cocis.2020.101393

  View details for Web of Science ID 000600601300011

• Multiscale study of CO2 impact on fluid transport and carbonate dissolution in Utica and Eagle Ford shale JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Elkady, Y., Kovscek, A. R. 2020; 195

  View details for DOI 10.1016/j.petrol.2020.107867

  View details for Web of Science ID 000586002900181

• Three-Dimensional Imaging and Quantification of Gas Storativity in Nanoporous Media via X-rays Computed Tomography ENERGIES Elkady, Y., Lyu, Y., Jessen, K., Kovscek, A. R. 2020; 13 (23)

  View details for DOI 10.3390/en13236199

  View details for Web of Science ID 000597083800001

• Transport Simulations on Scanning Transmission Electron Microscope Images of Nanoporous Shale ENERGIES Froute, L., Wang, Y., McKinzie, J., Aryana, S. A., Kovscek, A. R. 2020; 13 (24)

  View details for DOI 10.3390/en13246665

  View details for Web of Science ID 000602826900001

• Application of Digital Volume Correlation to X-ray Computed Tomography Images of Shale ENERGY & FUELS Kim, T., Yun, W., Kovscek, A. R. 2020; 34 (11): 13636–49

  View details for DOI 10.1021/acs.energyfuels.0c02305

  View details for Web of Science ID 000592961700027

• Pore-network modeling of single-phase reactive transport and dissolution pattern evaluation ADVANCES IN WATER RESOURCES Esteves, B. F., Lage, P. C., Couto, P., Kovscek, A. R. 2020; 145

  View details for DOI 10.1016/j.advwatres.2020.103741

  View details for Web of Science ID 000579002600008

• Effect of Pressure on Crude-Oil Kinetics During In Situ Combustion ENERGY & FUELS Yoo, K., Trujillo Portillo, M., Patino Ramirez, C., Sampaio, L., Gerritsen, M., Kovscek, A. R. 2020; 34 (10): 12103–17

  View details for DOI 10.1021/acs.energyfuels.0c01679

  View details for Web of Science ID 000582567000024

• Deep learning for automated characterization of pore-scale wettability ADVANCES IN WATER RESOURCES Yun, W., Liu, Y., Kovscek, A. R. 2020; 144

  View details for DOI 10.1016/j.advwatres.2020.103708

  View details for Web of Science ID 000567539100005

• Population-balance modeling of CO2 foam for CCUS using nanoparticles JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING Eide, O., Ferno, M., Bryant, S., Kovscek, A., Gauteplass, J. 2020; 80

  View details for DOI 10.1016/j.jngse.2020.103378

  View details for Web of Science ID 000549567300007

• Permeability and Porosity Evolution of Organic-Rich Shales from the Green River Formation as a Result of Maturation SPE JOURNAL Kim, T., Ross, C. M., Guan, K. M., Burnham, A. K., Kovscek, A. R. 2020; 25 (3): 1377–1405

  View details for Web of Science ID 000576602600022

• Thermal Imaging To Visualize and Characterize Combustion Fronts in Porous Media INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH Yoo, K., Sampaio, L., Amanam, U., Gerritsen, M., Kovscek, A. R. 2020; 59 (5): 2181–91

  View details for DOI 10.1021/acs.iecr.9b05737

  View details for Web of Science ID 000512223600043

• Spontaneous fingering between miscible fluids COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Song, W., Ramesh, N. N., Kovscek, A. R. 2020; 584

  View details for DOI 10.1016/j.colsurfa.2019.123943

  View details for Web of Science ID 000499647200023

• Investigation of the Effects of Select Metal Nanoparticles on Heavy Oil Combustion in Porous Media ENERGY & FUELS Amanam, U. U., Yoo, K., Castanier, L., Kovscek, A. R. 2020; 34 (1): 130–41

  View details for DOI 10.1021/acs.energyfuels.9b03252

  View details for Web of Science ID 000508470500012

• Investigating fracture propagation characteristics in shale using sc-CO2 and water with the aid of X-ray Computed Tomography Journal of Natural Gas Science and Engineering Al Shafloot, T., Kim, T., Kovscek, A. R. 2020

  View details for DOI 10.1016/j.jngse.2020.103736

• Pore Network Investigation of Trapped Gas and Foam Generation Mechanisms TRANSPORT IN POROUS MEDIA Almajid, M. M., Kovscek, A. R. 2020; 131 (1): 289–313

  View details for DOI 10.1007/s11242-018-01224-4

  View details for Web of Science ID 000512044800015

• Nanoparticle delivery to porous media via emulsions and thermally induced phase inversion COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Amanam, U. U., Zeng, H., Kovscek, A. R. 2019; 581

  View details for DOI 10.1016/j.colsurfa.2019.123614

  View details for Web of Science ID 000487764400001

• Modeling Steady-State Foam Flow: Hysteresis and Backward Front Movement ENERGY & FUELS Almajid, M. M., Nazari, N., Kovscek, A. R. 2019; 33 (11): 11353–63

  View details for DOI 10.1021/acs.energyfuels.9b01842

  View details for Web of Science ID 000499741900094

• Spontaneous clay Pickering emulsification COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Song, W., Kovscek, A. R. 2019; 577: 158–66

  View details for DOI 10.1016/j.colsurfa.2019.05.030

  View details for Web of Science ID 000477008000020

• The diffusion of water through oil contributes to spontaneous emulsification during low salinity waterflooding JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Aldousary, S., Kovscek, A. R. 2019; 179: 606–14

  View details for DOI 10.1016/j.petrol.2019.04.041

  View details for Web of Science ID 000470109500051

• Doctrines and realities in viscous and heavy-oil reservoir engineering JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Vittoratos, E., Kovscek, A. R. 2019; 178: 1164–77

  View details for DOI 10.1016/j.petrol.2019.03.044

  View details for Web of Science ID 000466615500098

• Investigation of the effects of ions on short-range non-DLVO forces at the calcite/brine interface and implications for low salinity oil-recovery processes. Journal of colloid and interface science Guo, H., Kovscek, A. R. 2019; 552: 295–311

  Abstract

  A primary question investigated in this study is the influence of brine chemistry on the behavior of short-range non-DLVO (e.g., hydration, discrete ion charge effects, and so on) forces at calcite surfaces. Specifically, how do wetting films containing Na+ differ from those containing Mg2+? Force-distance spectroscopy as measured by atomic force microscopy is used to probe short-range non-DLVO forces in various single-salt and multiple-salt electrolyte solutions. Experimental results reveal that, in single-component solutions, a greater concentration of Na+ ions decreases the decay length of short-range repulsion while a greater concentration of Mg2+ ions increases decay length. These results imply that Na+ ions reduce the affinity of calcite surfaces for water whereas Mg2+ ions make calcite more hydrophilic. Importantly, the relationship between the behavior of non-DLVO forces at small separations and concentrations of ions is not monotonic in multiple-component brines. Our observations support the hypothesis that Na+ ions disturb the interfacial water structure of calcite while Mg2+ ions are arranged farther away from the surface. Results obtained here may have implications for the design of so-called low salinity waterfloods where the composition of brines used for crude oil recovery is manipulated to increase oil recovery.

  View details for DOI 10.1016/j.jcis.2019.05.049

  View details for PubMedID 31132632

• Recovery efficiency of a 28 degrees API crude-oil system as a function of voidage replacement ratio JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Kim, T., Vittoratos, E., Kovscek, A. R. 2019; 175: 1063–87

  View details for DOI 10.1016/j.petrol.2019.01.028

  View details for Web of Science ID 000458153000084

• Influence of Microcracks on Flow and Storage Capacities of Gas Shales at Core Scale TRANSPORT IN POROUS MEDIA Alnoaimi, K. R., Kovscek, A. R. 2019; 127 (1): 53–84

  View details for DOI 10.1007/s11242-018-1180-5

  View details for Web of Science ID 000459472600003

• A systematic study of internal gas generation in shale source rocks using analog experiments JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Vega, B., Kovscek, A. R. 2019; 173: 209–21

  View details for DOI 10.1016/j.petrol.2018.10.006

  View details for Web of Science ID 000455118800018

• The Effect of Voidage-Displacement Ratio on Critical Gas Saturation SPE JOURNAL Kim, T., Kovscek, A. R. 2019; 24 (1): 178–99

  View details for DOI 10.2118/191383-PA

  View details for Web of Science ID 000458509000012

• Pore-scale visualization and characterization of viscous dissipation in porous media. Journal of colloid and interface science Roman, S. n., Soulaine, C. n., Kovscek, A. R. 2019; 558: 269–79

  Abstract

  The effects of mutual transfer of momentum between two immiscible flowing fluids in porous media are not well understood nor predictable yet. From considerations at the pore-scale, it should be possible to determine whether and to what extent interfacial viscous coupling effects are significant.We visualize the velocity distributions inside immobile globules of wetting phase (water) while a non-wetting phase (oil) is injected. We investigate viscous coupling effects and their relationship with the viscosity ratio and the capillary number.Four regimes of viscous dissipation are identified: (i) a regime for which the fluid-fluid interface acts as a solid wall; (ii) a regime where the wetting phase is dragged in the direction of the imposed flow; (iii) and (iv) two regimes for which the trapped globule of water shows a recirculating motion due to the shear stress at the oil/water interface. We demonstrate the significant role of the lubricating effect and of the topology of the pore space on the magnitude of viscous dissipation. Importantly, for a viscosity ratio close to one and low capillary number, we demonstrate that viscous coupling effects should be incorporated into the existing Darcy's law formulation for two-phase flow in porous media.

  View details for DOI 10.1016/j.jcis.2019.09.072

  View details for PubMedID 31593860

• Mechanisms of multiphase reactive flow using biogenically calcite-functionalized micromodels LAB ON A CHIP Song, W., Ogunbanwo, F., Steinsbo, M., Ferno, M. A., Kovscek, A. R. 2018; 18 (24): 3881–91

  View details for DOI 10.1039/c8lc00793d

  View details for Web of Science ID 000452320500016

• Mechanisms of multiphase reactive flow using biogenically calcite-functionalized micromodels. Lab on a chip Song, W., Ogunbanwo, F., Steinsbo, M., Ferno, M. A., Kovscek, A. R. 2018

  Abstract

  Dissolution of carbonate minerals in porous media is important to many instances of subsurface flow, including geological carbon dioxide (CO2) sequestration, karst formation, and crude-oil reservoir stimulation and acidizing. Of particular interest, geological CO2 storage in deep carbonate reservoirs presents a significant long-term opportunity to mitigate atmospheric carbon emissions. The reactivity of carbonate reservoirs, however, may negatively impact storage formation integrity and hence jeopardize sequestered CO2 storage security. In this work, we develop a novel biogenically calcite-functionalized microvisual device to study the fundamental pore-scale reactive transport dynamics in carbonate formations. Importantly, we discover a new microscale mechanism that dictates the overall behavior of the reactive transport phenomenon, where the reaction product, CO2, due to carbonate rock dissolution forms a separate, protective phase that engulfs the carbonate rock grain and reduces further dissolution. The presence of the separate, protective CO2 phase determines overall dissolution patterns in the storage reservoir and leads to formation of preferential leakage paths. We scale these results using nondimensional numbers to demonstrate their influence on industrial CO2 storage security, safety, and capacity.

  View details for PubMedID 30462124

• Pore-scale modelling of multiphase reactive flow: application to mineral dissolution with production of CO2 JOURNAL OF FLUID MECHANICS Soulaine, C., Roman, S., Kovscek, A., Tchelepi, H. A. 2018; 855: 616–45

  View details for DOI 10.1017/jfm.2018.655

  View details for Web of Science ID 000445208400002

• Pulsating linear in situ combustion: why do we often observe oscillatory behavior? COMPUTATIONAL GEOSCIENCES Bazargan, M., Kovscek, A. R. 2018; 22 (4): 1115–34

  View details for DOI 10.1007/s10596-018-9741-9

  View details for Web of Science ID 000438821700010

• An experimental platform for triaxial high-pressure/high-temperature testing of rocks using computed tomography REVIEW OF SCIENTIFIC INSTRUMENTS Glatz, G., Lapene, A., Castanier, L. M., Kovscek, A. R. 2018; 89 (4): 045101

  Abstract

  A conventional high-pressure/high-temperature experimental apparatus for combined geomechanical and flow-through testing of rocks is not X-ray compatible. Additionally, current X-ray transparent systems for computed tomography (CT) of cm-sized samples are limited to design temperatures below 180 °C. We describe a novel, high-temperature (>400 °C), high-pressure (>2000 psi/>13.8 MPa confining, >10 000 psi/>68.9 MPa vertical load) triaxial core holder suitable for X-ray CT scanning. The new triaxial system permits time-lapse imaging to capture the role of effective stress on fluid distribution and porous medium mechanics. System capabilities are demonstrated using ultimate compressive strength (UCS) tests of Castlegate sandstone. In this case, flooding the porous medium with a radio-opaque gas such as krypton before and after the UCS test improves the discrimination of rock features such as fractures. The results of high-temperature tests are also presented. A Uintah Basin sample of immature oil shale is heated from room temperature to 459 °C under uniaxial compression. The sample contains kerogen that pyrolyzes as temperature rises, releasing hydrocarbons. Imaging reveals the formation of stress bands as well as the evolution and connectivity of the fracture network within the sample as a function of time.

  View details for PubMedID 29716377

• An optimization algorithm for evaluation of kinetic parameters for crude oil combustion Journal of Petroleum Science and Engineering Koh Yoo, K. H., Sampaio, L., Gerritsen, M., Kovscek, A. 2018; 169: 241-257

  View details for DOI 10.1016/j.petrol.2018.04.076

• Effects of Image Resolution on Sandstone Porosity and Permeability as Obtained from X-Ray Microscopy Transport in Porous Media Guan, K. M., et al 2018

  View details for DOI 10.1007/s11242-018-1189-9

• Determination of pore-scale hydrate phase equilibria in sediments using lab-on-a-chip technology LAB ON A CHIP Almenningen, S., Flatlandsmo, J., Kovscek, A. R., Ersland, G., Ferno, M. A. 2017; 17 (23): 4070–76

  Abstract

  We present an experimental protocol for fast determination of hydrate stability in porous media for a range of pressure and temperature (P, T) conditions. Using a lab-on-a-chip approach, we gain direct optical access to dynamic pore-scale hydrate formation and dissociation events to study the hydrate phase equilibria in sediments. Optical pore-scale observations of phase behavior reproduce the theoretical hydrate stability line with methane gas and distilled water, and demonstrate the accuracy of the new method. The procedure is applicable for any kind of hydrate transitions in sediments, and may be used to map gas hydrate stability zones in nature.

  View details for DOI 10.1039/c7lc00719a

  View details for Web of Science ID 000415989600012

  View details for PubMedID 29067399

• Measurements and simulation of liquid films during drainage displacements and snap-off in constricted capillary tubes JOURNAL OF COLLOID AND INTERFACE SCIENCE Roman, S., Abu-Al-Saud, M. O., Tokunaga, T., Wan, J., Kovscek, A. R., Tchelepi, H. A. 2017; 507: 279–89

  Abstract

  When a wetting liquid is displaced by air in a capillary tube, a wetting film develops between the tube wall and the air that is responsible for the snap-off mechanism of the gas phase. By dissolving a dye in the wetting phase it is possible to relate a measure of the absorbance in the capillary to the thickness of liquid films. These data could be used to compare with cutting edge numerical simulations of the dynamics of snap-off for which experimental and numerical data are lacking. Drainage experiments in constricted capillary tubes were performed where a dyed wetting liquid is displaced by air for varying flow rates. We developed an optical method to measure liquid film thicknesses that range from 3 to 1000μm. The optical measures are validated by comparison with both theory and direct numerical simulations. In a constricted capillary tube we observed, both experimentally and numerically, a phenomenon of snap-off coalescence events in the vicinity of the constriction that bring new insights into our understanding and modeling of two-phase flows. In addition, the good agreement between experiments and numerical simulations gives confidence to use the numerical method for more complex geometries in the future.

  View details for PubMedID 28802195

• Experimental investigation and Grand Canonical Monte Carlo simulation of gas shale adsorption from the macro to the nano scale JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING Aljamaan, H., Al Ismail, M., Kovscek, A. R. 2017; 48: 119–37

  View details for DOI 10.1016/j.jngse.2016.12.024

  View details for Web of Science ID 000417003200011

• Multiscale Imaging of Gas Storage in Shales SPE JOURNAL Aljamaan, H., Ross, C. M., Kovscek, A. R. 2017; 22 (6): 1760–77

  View details for Web of Science ID 000418011600003

• NonArrhenius kinetics for reactive transport simulations of in situ combustion JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Bazargan, M., Kovscek, A. R. 2017; 157: 570–80

  View details for DOI 10.1016/j.petrol.2017.07.047

  View details for Web of Science ID 000410624800046

• Creation of a dual-porosity and dual-depth micromodel for the study of multiphase flow in complex porous media LAB ON A CHIP Yun, W., Ross, C. M., Roman, S., Kovscek, A. R. 2017; 17 (8): 1462-1474

  Abstract

  Silicon-based microfluidic devices, so-called micromodels in this application, are particularly useful laboratory tools for the direct visualization of fluid flow revealing pore-scale mechanisms controlling flow and transport phenomena in natural porous media. Current microfluidic devices with uniform etched depths, however, are limited when representing complex geometries such as the multiple-scale pore sizes common in carbonate rocks. In this study, we successfully developed optimized sequential photolithography to etch micropores (1.5 to 21 μm width) less deeply than the depth of wider macropores (>21 μm width) to improve the structural realism of an existing single-depth micromodel with a carbonate-derived pore structure. Surface profilimetry illustrates the configuration of the dual-depth dual-porosity micromodel and is used to estimate the corresponding pore volume change for the dual-depth micromodel compared to the equivalent uniform- or single-depth model. The flow characteristics of the dual-depth dual-porosity micromodel were characterized using micro-particle image velocimetry (μ-PIV), relative permeability measurements, and pore-scale observations during imbibition and drainage processes. The μ-PIV technique provides insights into the fluid dynamics within microfluidic channels and relevant fluid velocities controlled predominantly by changes in etching depth. In addition, the reduction of end-point relative permeability for both oil and water in the new dual-depth dual-porosity micromodel compared to the equivalent single-depth micromodel implies more realistic capillary forces occurring in the new dual-depth micromodel. Throughout the imbibition and drainage experiments, the flow behaviors of single- and dual-depth micromodels are further differentiated using direct visualization of the trapped non-wetting phase and the preferential mobilization of the wetting phase in the dual-depth micromodel. The visual observations agree with the relative permeability results. These findings indicate that dual-porosity and dual-depth micromodels have enhanced physical realism that is pertinent to oil recovery processes in complex porous media.

  View details for DOI 10.1039/c6lc01343k

  View details for Web of Science ID 000399213700008

  View details for PubMedID 28294224

• Analysis of the effects of copper nanoparticles on in-situ combustion of extra heavy-crude oil JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Amanam, U. U., Kovscek, A. R. 2017; 152: 406-415

  View details for DOI 10.1016/j.petrol.2017.02.018

  View details for Web of Science ID 000401042000033

• CO2 Storage and Flow Capacity Measurements on Idealized Shales from Dynamic Breakthrough Experiments ENERGY & FUELS Aljamaan, H., Holmes, R., Vishal, V., Haghpanah, R., Wilcox, J., Kovscek, A. R. 2017; 31 (2): 1193-1207

  View details for DOI 10.1021/acs.energyfuels.6b02286

  View details for Web of Science ID 000394560900014

• Multiscale pore structure characterization of middle east carbonates JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Gundogar, A. S., Ross, C. M., Akin, S., Kovscek, A. R. 2016; 146: 570-583

  View details for DOI 10.1016/j.petrol.2016.07.018

  View details for Web of Science ID 000384854200054

• In-Situ Visualization of Multidimensional Imbibition in Dual-Porosity Carbonates SPE JOURNAL Alshehri, A. J., Kovscek, A. R. 2016; 21 (5): 1631-1642

  View details for Web of Science ID 000393303000011

• Pore-level hydrate formation mechanisms using realistic rock structures in high-pressure silicon micromodels INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Hauge, L. P., Gauteplass, J., Hoyland, M. D., Ersland, G., Kovscek, A., Ferno, M. A. 2016; 53: 178-186

  View details for DOI 10.1016/j.ijggc.2016.06.017

  View details for Web of Science ID 000383725700018

• Visualization and Quantification of Thermally Induced Porosity Alteration of Immature Source Rock Using X-ray Computed Tomography ENERGY & FUELS Glatz, G., Castanier, L. M., Kovscek, A. R. 2016; 30 (10): 8141-8149

  View details for DOI 10.1021/acs.energyfuels.6b01430

  View details for Web of Science ID 000386107200038

• Particle velocimetry analysis of immiscible two-phase flow in micromodels ADVANCES IN WATER RESOURCES Roman, S., Soulaine, C., Abu AlSaud, M., Kovscek, A., Tchelepi, H. 2016; 95: 199-211

  View details for DOI 10.1016/j.adywatres.2015.08.015

  View details for Web of Science ID 000383299300016

• Direct visualization of pore-scale fines migration and formation damage during low-salinity waterflooding JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING Song, W., Kovscek, A. R. 2016; 34: 1276-1283

  View details for DOI 10.1016/j.jngse.2016.07.055

  View details for Web of Science ID 000384390300113

• An Experimental Investigation of Viscous-Oil Recovery Efficiency as a Function of Voidage-Replacement Ratio SPE JOURNAL Kim, T. W., VITTORATOS, E., Kovscek, A. R. 2016; 21 (4): 1236-1253

  View details for Web of Science ID 000393300000013

• Experimental Study of Foam Generation, Sweep Efficiency, and Flow in a Fracture Network SPE JOURNAL Ferno, M. A., Gauteplass, J., Pancharoen, M., Haugen, A., Graue, A., Kovscek, A. R., Hirasaki, G. 2016; 21 (4): 1140-1150

  View details for Web of Science ID 000393300000005

• Understanding the role of brine ionic composition on oil recovery by assessment of wettability from colloidal forces ADVANCES IN COLLOID AND INTERFACE SCIENCE Alshakhs, M. J., Kovscek, A. R. 2016; 233: 126-138

  Abstract

  The impact of injection brine salinity and ionic composition on oil recovery has been an active area of research for the past 25years. Evidence from laboratory studies and field tests suggests that implementing certain modifications to the ionic composition of the injection brine leads to greater oil recovery. The role of salinity modification is attributed to its ability to shift wettability of a rock surface toward water wetness. The amount of trapped oil released depends on the nature of rock, oil, and brine surface interactions. Reservoir rocks exhibit different affinities to fluids. Carbonates show stronger adsorption of oil films as opposed to the strongly water-wet and mixed-wet sandstones. The concentration of divalent ions and total salinity of the injection brine are other important factors to consider. Accordingly, this paper provides a review of laboratory and field studies of the role of brine composition on oil recovery from carbonaceous rock as well as rationalization of results using DLVO (Derjaguin, Landau, Verwey and Overbeek) theory of surface forces. DLVO evaluates the contribution of each component of the oil/brine/rock system to the wettability. Measuring zeta potential of each pair of surfaces by a charged particle suspension method is used to estimate double layer forces, disjoining pressure, and contact-angle. We demonstrate the applicability of the DLVO approach by showing a comprehensive experimental study that investigates the effect of divalent ions in carbonates, and uses disjoining pressure results to rationalize observations from core flooding and direct contact-angle measurements.

  View details for DOI 10.1016/j.cis.2015.08.004

  View details for Web of Science ID 000379564300009

  View details for PubMedID 26344867

• Pore-level mechanics of foam generation and coalescence in the presence of oil ADVANCES IN COLLOID AND INTERFACE SCIENCE Almajid, M. M., Kovscek, A. R. 2016; 233: 65-82

  Abstract

  The stability of foam in porous media is extremely important for realizing the advantages of foamed gas on gas mobility reduction. Foam texture (i.e., bubbles per volume of gas) achieved is dictated by foam generation and coalescence processes occurring at the pore-level. For foam injection to be widely applied during gas injection projects, we need to understand these pore-scale events that lead to foam stability/instability so that they are modeled accurately. Foam flow has been studied for decades, but most efforts focused on studying foam generation and coalescence in the absence of oil. Here, the extensive existing literature is reviewed and analyzed to identify open questions. Then, we use etched-silicon micromodels to observe foam generation and coalescence processes at the pore-level. Special emphasis is placed on foam coalescence in the presence of oil. For the first time, lamella pinch-off as described by Myers and Radke [40] is observed in porous media and documented. Additionally, a new mechanism coined "hindered generation" is found. Hindered generation refers to the role oil plays in preventing the successful formation of a lamella following snap-off near a pore throat.

  View details for DOI 10.1016/j.cis2015.10.008

  View details for Web of Science ID 000379564300005

  View details for PubMedID 26548502

• Characterization and Measurement of Multiscale Gas Transport in Shale-Core Samples SPE JOURNAL Alnoaimi, K. R., Duchateau, C., Kovscek, A. R. 2016; 21 (2): 573-588

  View details for Web of Science ID 000385254100020

• Characterization of scalar mixing in dense gaseous jets using X-ray computed tomography EXPERIMENTS IN FLUIDS Dunnmon, J., Sobhani, S., Kim, T. W., Kovscek, A., Ihme, M. 2015; 56 (10)

  View details for DOI 10.1007/s00348-015-2057-9

  View details for Web of Science ID 000363486500009

• Functionalization of micromodels with kaolinite for investigation of low salinity oil-recovery processes. Lab on a chip Song, W., Kovscek, A. R. 2015; 15 (16): 3314-3325

  Abstract

  Sandstone formations are ubiquitous in both aquifers and petroleum reservoirs, of which clay is a major constituent. The release of clay particles from pore surfaces as a result of reduced injection fluid salinity can greatly modify the recovery of hydrocarbons from subsurface formations by shifting the wettability properties of the rock. In this paper we demonstrate a microfluidic approach whereby kaolinite is deposited into a two-dimensional microfluidic network (micromodel) to enable direct pore-scale, real-time visualization of fluid-solid interactions with representative pore-geometry and realistic surface interactions between the reservoir fluids and the formation rock. Structural characterization of deposited kaolinite particles agrees well with natural modes of occurrence in Berea sandstones; hence, the clay deposition method developed in this work is validated. Specifically, more than 90% of the deposited clay particles formed pore-lining structures and the remainder formed pore bridging structures. Further, regions of highly concentrated clay deposition likely leading to so-called Dalmatian wetting properties were found throughout the micromodel. Two post-deposition treatments are described whereby clay is adhered to the silicon surface reversibly and irreversibly resulting in microfluidic systems that are amenable to studies on (i) the fundamental mechanisms governing the increased oil recovery during low salinity waterfloods and (ii) the effect of a mixed-wet surface on oil recovery, respectively. The reversibly functionalized platform is used to determine the conditions at which stably adhered clay particles detach. Specifically, injection brine salinity below 6000 ppm of NaCl induced kaolinite particle release from the silicon surface. Furthermore, when applied to an aged system with crude oil, the low salinity waterflood recovered an additional 14% of the original oil in place compared to waterflooding with the formation brine.

  View details for DOI 10.1039/c5lc00544b

  View details for PubMedID 26151880

• Imaging-Based Characterization of Calcite-Filled Fractures and Porosity in Shales SPE JOURNAL Vega, B., Ross, C. M., Kovscek, A. R. 2015; 20 (4): 810-823

  View details for Web of Science ID 000364541700012

• Microvisual investigation of polymer retention on the homogeneous pore network of a micromodel JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Yun, W., Kovscek, A. R. 2015; 128: 115-127

  View details for DOI 10.1016/j.petrol.2015.02.004

  View details for Web of Science ID 000353744200012

• Pore-level foam generation and flow for mobility control in fractured systems COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Gauteplass, J., Chaudhary, K., Kovscek, A. R., Ferno, M. A. 2015; 468: 184-192

  View details for DOI 10.1016/j.colsurfa.2014.12.043

  View details for Web of Science ID 000349446500022

• A Reaction Model-Free Approach for In Situ Combustion Calculations: 1-Kinetics Prediction TRANSPORT IN POROUS MEDIA Bazargan, M., Kovscek, A. R. 2015; 107 (2): 507-525

  View details for DOI 10.1007/s11242-014-0451-z

  View details for Web of Science ID 000351398700012

• An experimental investigation of the in-situ combustion behavior of Karamay crude oil JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Zhao, R., Chen, Y., Huan, R., Castanier, L. M., Kovscek, A. R. 2015; 127: 82-92

  View details for DOI 10.1016/j.petrol.2015.01.005

  View details for Web of Science ID 000351782400007

• Kinetics Oxidation of Heavy Oil. 2. Application of Genetic Algorithm for Evaluation of Kinetic Parameters ENERGY & FUELS Lapene, A., Debenest, G., Quintard, M., Castanier, L. M., Gerritsen, M. G., Kovscek, A. R. 2015; 29 (2): 1119-1129

  View details for DOI 10.1021/ef501392k

  View details for Web of Science ID 000349943300073

• Functionalization of micromodels with kaolinite for investigation of low salinity oil-recovery processes LAB ON A CHIP Song, W., Kovscek, A. R. 2015; 15 (16): 3314-3325

  View details for DOI 10.1039/c5lc00544b

  View details for Web of Science ID 000358609500008

• Gas Sorption and the Consequent Volumetric and Permeability Change of Coal I: Experimental TRANSPORT IN POROUS MEDIA Lin, W., Kovscek, A. R. 2014; 105 (2): 371-389

  View details for DOI 10.1007/s11242-014-0373-9

  View details for Web of Science ID 000344600200005

• Gas Sorption and the Consequent Volumetric and Permeability Change of Coal II: Numerical Modeling TRANSPORT IN POROUS MEDIA Lin, W., Kovscek, A. R. 2014; 105 (1): 23-42

  View details for DOI 10.1007/s11242-014-0356-x

  View details for Web of Science ID 000342497600002

• Fines migration and compaction in diatomaceous rocks JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Lagasca, J. R., Kovscek, A. R. 2014; 122: 108-118

  View details for DOI 10.1016/j.petrol.2014.06.024

  View details for Web of Science ID 000345182300011

• Klinkenberg effect on predicting and measuring helium permeability in gas shales INTERNATIONAL JOURNAL OF COAL GEOLOGY Firouzi, M., Alnoaimi, K., Kovscek, A., Wilcox, J. 2014; 123: 62-68

  View details for DOI 10.1016/j.coal.2013.09.006

  View details for Web of Science ID 000332820700007

• Consistency Measures for Isoconversional Interpretation of In-Situ Combustion Reaction Kinetics ENERGY & FUELS Chen, B., Castanier, L. M., Kovscek, A. R. 2014; 28 (2): 868-876

  View details for DOI 10.1021/ef4020235

  View details for Web of Science ID 000331861800017

• CT Imaging of Low-Permeability, Dual-Porosity Systems Using High X-ray Contrast Gas Transport in Porous Media Vega, B., Dutta, A., Kovscek, A. R. 2014; 101 (1): 81-97

  View details for DOI 10.1007/s11242-013-0232-0

• Solar-generated steam for oil recovery: Reservoir simulation, economic analysis, and life cycle assessment ENERGY CONVERSION AND MANAGEMENT Sandler, J., Fowler, G., Cheng, K., Kovscek, A. R. 2014; 77: 721-732

  View details for DOI 10.1016/j.enconman.2013.10.026

  View details for Web of Science ID 000330494600076

• CT Imaging of Low-Permeability, Dual-Porosity Systems Using High X-ray Contrast Gas TRANSPORT IN POROUS MEDIA Vega, B., Dutta, A., Kovscek, A. R. 2014; 101 (1): 81-97

  View details for DOI 10.1007/s11242-013-0232-0

  View details for Web of Science ID 000328208700006

• (Submitted) Solar-Generated Steam for Oil Recovery: Reservoir Simulation, Economic Analysis, and Life Cycle Assessment Energy Conversion and Management Sandler, J., Fowler, G., Cheng, K., Kovscek, A. R. 2014
• Fuel Formation and Conversion During In-Situ Combustion of Crude Oil SPE JOURNAL Hascakir, B., Ross, C. M., Castanier, L. M., Kovscek, A. R. 2013; 18 (6): 1217-1228

  View details for Web of Science ID 000329265500018

• An induction reactor for studying crude-oil oxidation relevant to in situ combustion. Review of scientific instruments Bazargan, M., Lapene, A., Chen, B., Castanier, L. M., Kovscek, A. R. 2013; 84 (7): 075115-?

  Abstract

  In a conventional ramped temperature oxidation kinetics cell experiment, an electrical furnace is used to ramp temperature at a prescribed rate. Thus, the heating rate of a kinetics cell experiment is limited by furnace performance to heating rates of about 0.5-3 °C/min. A new reactor has been designed to overcome this limit. It uses an induction heating method to ramp temperature. Induction heating is fast and easily controlled. The new reactor covers heating rates from 1 to 30 °C/min. This is the first time that the oxidation profiles of a crude oil are available over such a wide range of heating rate. The results from an induction reactor and a conventional kinetics cell at roughly 2 °C/min are compared to illustrate consistency between the two reactors. The results at low heating rate are the same as the conventional kinetics cell. As presented in the paper, the new reactor couples well with the isoconversional method for interpretation of reaction kinetics.

  View details for DOI 10.1063/1.4815827

  View details for PubMedID 23902114

• An induction reactor for studying crude-oil oxidation relevant to in situ combustion REVIEW OF SCIENTIFIC INSTRUMENTS Bazargan, M., Lapene, A., Chen, B., Castanier, L. M., Kovscek, A. R. 2013; 84 (7)

  View details for DOI 10.1063/1.4815827

  View details for Web of Science ID 000322602200078

  View details for PubMedID 23902114

• Wettability Alteration of a Heavy Oil/Brine/Carbonate System with Temperature ENERGY & FUELS Kim, T. W., Kovscek, A. R. 2013; 27 (6): 2984-2998

  View details for DOI 10.1021/ef400204k

  View details for Web of Science ID 000320911200014

• Pore-Scale Evaluation of Polymers Displacing Viscous Oil-Computational-Fluid-Dynamics Simulation of Micromodel Experiments SPE RESERVOIR EVALUATION & ENGINEERING Clemens, T., Tsikouris, K., Buchgraber, M., Castanier, L., Kovscek, A. 2013; 16 (2): 144-154

  View details for Web of Science ID 000319532500003

• Improved Predictability of In-Situ-Combustion Enhanced Oil Recovery SPE RESERVOIR EVALUATION & ENGINEERING Kovscek, A. R., Castanier, L. M., Gerritsen, M. G. 2013; 16 (2): 172-182

  View details for Web of Science ID 000319532500005

• Nonequilibrium Effects and Multiphase Flow in Porous Media TRANSPORT IN POROUS MEDIA Aryana, S. A., Kovscek, A. R. 2013; 97 (3): 373-394

  View details for DOI 10.1007/s11242-013-0129-y

  View details for Web of Science ID 000316025200006

• Modification of heavy-oil rheology via alkaline solutions JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Zhao, R. B., Tang, G. Q., Kovscek, A. R. 2013; 103: 41-50

  View details for DOI 10.1016/j.petrol.2013.02.009

  View details for Web of Science ID 000320220300005

• An Experimental Investigation of the In-Situ Combustion Behavior of Karamay Crude Oil SPE Western Regional Meeting Zhao, R., Castanier, L. M., Kovscek, A. R. 2013
• Optimal Voidage Replacement Ratio for Viscous and Heavy Oil Reservoirs SPE Western Regional Meeting Delgado, D. E., Vittoratos, E. S., Kovscek, A. R. 2013
• History and Application of Resistance Electrical Heaters in Downhole Oil Field Applications SPE Western Regional Meeting Sandberg, C., Hale, A., Kovscek, A. R. 2013
• Solar-Generated Steam for Heavy-Oil Recovery: A Coupled Geomechanical and Reservoir Modeling Analysis SPE Western Regional Meeting Agarwal, A., Kovscek, A. R. 2013
• Experiments and analysis of drainage displacement processes relevant to carbon dioxide injection PHYSICAL REVIEW E Aryana, S. A., Kovscek, A. R. 2012; 86 (6)

  Abstract

  The motivation for this work is a dramatically improved understanding of the fluid mechanics of drainage processes with applications such as CO_{2} storage in saline aquifers and water-alternating-gas injection as an enhanced oil recovery method. In this paper we present in situ distributions of wetting and nonwetting fluids obtained during core-scale two-phase immiscible drainage experiments. The ratio of the viscosity of the resident fluid to that of the invading fluid varies across a range of 0.43 to 150. Saturation distributions observed during dynamic displacement experiments are surprisingly smooth and do not display only one or a few dominant fingers, contrary to the indications of the current literature. The analysis of the saturation distribution using the fractal dimensions of the dynamic three-dimensional saturation distributions suggests that the constitutive relationships for porous media, namely, the relative permeability functions, are history dependent. Accordingly, it is suggested that the nonlinear, unstable flow regime is the regime where efforts to improve physical understanding must be focused.

  View details for DOI 10.1103/PhysRevE.86.066310

  View details for Web of Science ID 000312297400004

  View details for PubMedID 23368041

• A Study of Microscale Gas Trapping Using Etched Silicon Micromodels TRANSPORT IN POROUS MEDIA Buchgraber, M., Kovscek, A. R., Castanier, L. M. 2012; 95 (3): 647-668

  View details for DOI 10.1007/s11242-012-0067-0

  View details for Web of Science ID 000310744900010

• Modeling foam displacement in fractures JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Pancharoen, M., Ferno, M. A., Kovscek, A. R. 2012; 100: 50-58

  View details for DOI 10.1016/j.petrol.2012.11.018

  View details for Web of Science ID 000315311400008

• Experiments and Analysis of Multiscale Viscous Fingering During Forced Imbibition SPE Annual Technical Conference and Exhibition Sharma, J., Inwood, S. B., Kovscek, A. R. SOC PETROLEUM ENG. 2012: 1142–59

  View details for Web of Science ID 000313300500016

• Emerging challenges and potential futures for thermally enhanced oil recovery JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Kovscek, A. R. 2012; 98-99: 130-143

  View details for DOI 10.1016/j.petrol.2012.08.004

  View details for Web of Science ID 000327682900013

• Creation of a dual-porosity micromodel for pore-level visualization of multiphase flow JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Buchgraber, M., Al-Dossary, M., Ross, C. M., Kovscek, A. R. 2012; 86-87: 27-38

  View details for DOI 10.1016/j.petrol.2012.03.012

  View details for Web of Science ID 000305820700003

• Executive Summary SPE JOURNAL Kovscek, A. R. 2012; 17 (1): 7-7

  View details for Web of Science ID 000301471300001

• Microvisual Investigation of Foam Flow in Ideal Fractures: Role of Fracture Aperture and Surface Roughness SPE Annual Technical Conference and Exhibition Buchgraber, M., Castanier, L. M., Kovscek, A. R. 2012
• Pore-Scale Evaluation of Polymers Displacing Viscous Oil – Computational Fluid Dynamics Simulation of Micromodel Experiments, SPE 154169 Proceedings of the Eighteenth SPE Improved Oil Recovery Symposium held in Tulsa, Oklahoma, USA, 14–18 April 2012 Clemens, T., Tsikouris, K., Buchgraber, M., Castanier, L. M., Kovscek, A. R. 2012
• Solar-Generated Steam for Oil Recovery: Reservoir Simulation, Economic Analysis, and Life Cycle Assessment, SPE Western Regional Meeting Sandler, J., Fowler, G., Cheng, K., Kovscek, A. R. 2012
• Uncertainty Analysis on In-Situ Combustion Simulations Using Experimental Design SPE Western Regional Meeting Ogunbanwo, O., Gerritsen, M., Kovscek, A. R. 2012
• An X-Ray CT Study of Multidimensional Imbibition in Dual Porosity Carbonates SPE Annual Technical Conference and Exhibition Alshehri, A. J., Kovscek, A. R. 2012
• Emerging Challenges and Potential Futures for Thermally Enhanced Oil Recovery Journal of Petroleum Science & Engineering Kovscek, A. R. 2012: 98-99 130-143

  View details for DOI 10.1016/j.petrol.2012.08.004

• Kinetics Oxidation of Heavy Oil. 1. Compositional and Full Equation of State Model ENERGY & FUELS Lapene, A., Debenest, G., Quintard, M., Castanier, L. M., Gerritsen, M. G., Kovscek, A. R. 2011; 25 (11): 4886-4895

  View details for DOI 10.1021/ef200365y

  View details for Web of Science ID 000297001400003

• Combustion Kinetics of Heavy Oils in Porous Media ENERGY & FUELS Cinar, M., Castanier, L. M., Kovscek, A. R. 2011; 25 (10): 4438-4451

  View details for DOI 10.1021/ef200680t

  View details for Web of Science ID 000296212900024

• Predictability of Crude Oil In-Situ Combustion by the Isoconversional Kinetic Approach SPE JOURNAL Cinar, M., Hascakir, B., Castanier, L. M., Kovscek, A. R. 2011; 16 (3): 537-547

  View details for Web of Science ID 000294880600006

• In-Situ Combustion Dynamics Visualized With X-Ray Computed Tomography SPE JOURNAL Hascakir, B., Glatz, G., Castanier, L. M., Kovscek, A. R. 2011; 16 (3): 524-536

  View details for Web of Science ID 000294880600005

• A Microvisual Study of the Displacement of Viscous Oil by Polymer Solutions SPE RESERVOIR EVALUATION & ENGINEERING Buchgraber, M., Clemens, T., Castanier, L. M., Kovscek, A. R. 2011; 14 (3): 269-280

  View details for Web of Science ID 000291519400001

• Temperature-Induced Fracture Reconsolidation of Diatomaceous Rock During Forced Water Imbibition SPE RESERVOIR EVALUATION & ENGINEERING Peng, J., Kovscek, A. R. 2011; 14 (1): 45-59

  View details for Web of Science ID 000287790300004

• Super insulated wells to protect permafrost during thermal oil recovery INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY Marques, C., Castanier, L. M., Kovscek, A. R. 2011; 4 (1): 4-30

  View details for Web of Science ID 000295489900002

• Experiments and Analysis of Multiscale Viscous Fingering during Forced Imbibition, SPE-143946 Proceedings of the 2011 SPE Annual Technical Conference and Exhibition, Denver, CO 30 Oct - 2 Nov Sharma, J., Inwood, S. B., Kovscek, A. R. 2011
• A Microvisual Study of the Displacement of Viscous Oil by Polymer Solutions SPE Reservoir Evaluation & Engineering Buchgraber, M., Clemens, T., Castanier, L., Kovscek, A. 2011; 14 (3)

  View details for DOI 10.2118/122400-pa

• Kinetic Cell and Combustion Tube Results for a Central European Crude Oil SPE Annual Technical Conference and Exhibition Glatz, G., Hascakir, B., Castanier, L. M., Clemens, T., Kovscek, A. R. 2011
• A Combined Experimental and Simulation Workflow to Improve Predictability of In Situ Combustion Western North America Regional Meeting Bazargan, M., Chen, B., Cinar, M., Glatz, G., Lapene, A., Zhu, Z., Castanier, L., Gerritsen, M., Kovscek, A. R. 2011
• Fuel Formation During In-Situ Combustion SPE Annual Technical Conference and Exhibition Hascakir, B., Ross, C. M., Castanier , L. M., Kovscek, A. R. 2011
• Thermally Induced Fracture Reconsolidation of Diatomite Under No Flow Conditions Western North America Regional Meeting Vega, B., Tang, G., Kovscek, A. R. 2011
• Upscaling for Field-scale In-situ Combustion Simulation Western North America Regional Meeting Zhu, Z., Bazargan, M., Lapene, A., Gerritsen, M., Castanier, L., Kovscek, A. 2011
• Improved Predictability of In-Situ Combustion Enhanced Oil Recovery Proceedings of the 2011 International Energy Agency EOR Symposium, Vienna Austria 17-19 October 2011 Kovscek, A. R., Castanier, L. M., Gerritsen, M. G. 2011
• High Resolution Imaging of Unstable, Forced Imbibition in Berea Sandstone TRANSPORT IN POROUS MEDIA Tang, G., Kovscek, A. R. 2011; 86 (2): 647-664

  View details for DOI 10.1007/s11242-010-9643-3

  View details for Web of Science ID 000286918900019

• Wettability estimation of low-permeability, siliceous shale using surface forces JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Takahashi, S., Kovscek, A. R. 2010; 75 (1-2): 33-43

  View details for DOI 10.1016/j.petrol.2010.10.008

  View details for Web of Science ID 000286846200004

• Untitled SPE JOURNAL Kovscek, A. R. 2010; 15 (3): 586-586

  View details for Web of Science ID 000282070500001

• Time-Dependent Shape Factors for Uniform and Non-Uniform Pressure Boundary Conditions TRANSPORT IN POROUS MEDIA Rangel-German, E. R., Kovscek, A. R., Akin, S. 2010; 83 (3): 591-601

  View details for DOI 10.1007/s11242-009-9461-7

  View details for Web of Science ID 000278899400008

• Modeling Foam Displacement With the Local-Equilibrium Approximation: Theory and Experimental Verification 2008 SPE Annual Technical Conference and Exhibition Chen, Q., Gerritsen, M. G., Kovscek, A. R. SOC PETROLEUM ENG. 2010: 171–83

  View details for Web of Science ID 000280326600016

• Spontaneous countercurrent imbibition and forced displacement characteristics of low-permeability, siliceous shale rocks JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Takahashi, S., Kovscek, A. R. 2010; 71 (1-2): 47-55

  View details for DOI 10.1016/j.petrol.2010.01.003

  View details for Web of Science ID 000276125300008

• An Experimental Investigation Of In-Situ Combustion In Heterogeneous Media Canadian Unconventional Resources & International Petroleum Conference Awoleke, O. G., Castanier, L. M., Kovscek, A. R. 2010
• Storage of Greenhouse Gases in Oil and Gas Reservoirs Developments and Innovation in Carbon Capture and Storage (CCS) Technology Vega, B., Kovscek, A. R. edited by Maroto-Valer, M. M. Woodhead Publishing LTD, Cambridge, UK. 2010
• Improving Steam-Assisted Gravity Drainage Using Mobility Control Foams: Foam Assisted-SAGD (FA-SAGD) SPE Improved Oil Recovery Symposium Chen, Q., Gerritsen, M., Kovscek, A. 2010

  View details for DOI 10.2118/129847-ms

• Inaccessible Pore Volume of Associative Polymer Floods SPE Improved Oil Recovery Symposium Pancharoen, M., Thiele, M. R., Kovscek, A. R. 2010
• Experimental Investigation of Oil Recovery From Siliceous Shale by Miscible CO2 Injection SPE Annual Technical Conference and Exhibition Vega, B., O’Brien, W. J., Kovscek, A. R. 2010
• Reservoir Simulation of Cyclic Steam Injection Including the Effects of Temperature Induced Wettability Alteration Western North America Regional Meeting Hascakir, B., Kovscek, A. R. 2010
• Isoconversional Kinetic Analysis of the Combustion of Heavy Hydrocarbons ENERGY & FUELS Cinar, M., Castanier, L. M., Kovscek, A. R. 2009; 23 (8): 4003-4015

  View details for DOI 10.1021/ef900222w

  View details for Web of Science ID 000269088300023

• Oil chemistry and its impact on heavy oil solution gas drive JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Peng, J., Tang, G., Kovscek, A. R. 2009; 66 (1-2): 47-59

  View details for DOI 10.1016/j.petrol.2009.01.005

  View details for Web of Science ID 000265589700006

• Spontaneous imbibition and wettability characteristics of Powder River Basin coal INTERNATIONAL JOURNAL OF COAL GEOLOGY Chaturvedi, T., Schembre, J. M., Kovscek, A. R. 2009; 77 (1-2): 34-42

  View details for DOI 10.1016/j.coal.2008.08.002

  View details for Web of Science ID 000262555600006

• Pore-Level Mechanics of Forced and Spontaneous Imbibition of Aqueous Surfactant Solutions in Fractured Porous Media SPE Annual Technical Conference and Exhibition Alshehri, A. J., Sagatov, E., Kovscek, A. R. 2009
• Overview-Heavy Oil Journal of Petroleum Technology Kovscek, A. R. 2009; 61 (3): 76
• Spontaneous Countercurrent Imbibition and Forced Displacement Characteristics of Low-Permeability, Siliceous Shale Rocks SPE Western Regional Meeting Takahashi, S., Kovscek, A. R. 2009
• Thaw Front Dynamics and Super Insulated Wells for Thermal Recovery in Cold Environments SPE Western Regional Meeting Marques, C., Castanier, L. M., Kovscek, A. R. 2009
• The Displacement of Viscous Oil by Associative Polymer Solutions SPE Annual Technical Conference and Exhibition Buchgraber, M., Clemens, T., Castanier, L. M., Kovscek, A. R. 2009
• Isoconversional Kinetic Analysis of the Combustion of Heavy Hydrocarbons SPE Western Regional Meeting Cinar, M., Castanier, L. M., Kovscek, A. R. 2009
• Effects of Reservoir Heterogeneities on the Steam-Assisted Gravity-Drainage Process SPE RESERVOIR EVALUATION & ENGINEERING Chen, Q., Gerritsen, M. G., Kovscek, A. R. 2008; 11 (5): 921-932

  View details for Web of Science ID 000261045800013

• Sorption-induced permeability change of coal during gas-injection processes SPE RESERVOIR EVALUATION & ENGINEERING Lin, W., Tang, G., Kovscek, A. R. 2008; 11 (4): 792-802

  View details for Web of Science ID 000258936400015

• Laboratory and simulation investigation of enhanced coalbed methane recovery by gas injection TRANSPORT IN POROUS MEDIA Jessen, K., Tang, G., Kovscek, A. R. 2008; 73 (2): 141-159

  View details for DOI 10.1007/s11242-007-9165-9

  View details for Web of Science ID 000255198700002

• Authors' reply to discussion of interrelationship of temperature and wettability on the relative permeability of heavy oil in diatomaceous rocks SPE RESERVOIR EVALUATION & ENGINEERING Kovscek, A. R., Schembro, J. M., Tang, G. 2008; 11 (3): 437-438

  View details for Web of Science ID 000257357200002

• Combination of well log and pore-scale data to predict petrophysical properties of diatomite JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Akin, S., Ross, C. M., Kovscek, A. R. 2008; 60 (3-4): 133-149

  View details for DOI 10.1016/j.petrol.2007.05.013

  View details for Web of Science ID 000255445200001

• Alteration of Reservoir Diatomites by Hot Water Injection SPE Western Regional Meeting Ikeda, M., Tang, G., Ross, C. M., Kovscek, A. R. 2008
• Enhanced Oil Recovery Using Aqueous Phase Chemicals, Miscible Gas Injection, and Thermal Means, in Petroleum Engineering-Upstream Encyclopedia of Life Support Systems (EOLSS) Kovscek, A. R. edited by Mesini, E., Macini, P. 2008
• Polymer Augmented Waterflooding Encyclopedia of Petroleum Science & Engineering Kovscek, A. R. edited by Antos, G. J. Marcel Dekker, New York. 2008
• Overview-Heavy Oil Journal of Petroleum Technology Kovscek, A. R. 2008; 60 (3): 84
• Petroleum Recovery Encyclopedia of Petroleum Science & Engineering Kovscek, A. R. edited by Antos, G. J. Marcel Dekker, New York. 2008

  View details for DOI 10.1007/s11242-005-6093-4

• Foam Transport in Porous Media Encyclopedia of Petroleum Science & Engineering Kovscek, A. R., Radke , C. J. edited by Antos, G. J. Marcel Dekker, New York. 2008
• Laboratory investigation of the effect of solvent injection on in-situ combustion SOC PETROLEUM ENG. Cristofari, J., Castanier, L. M., Kovscek, A. R. 2008: 153-163
• Immiscible Carbon Dioxide Displacement Encyclopedia of Petroleum Science & Engineering Kovscek, A. R. edited by Speight, J. G. Marcel Dekker, New York. 2008
• Experimental Investigation of Oil Recovery From Siliceous Shale by CO2 Injection SPE Annual Technical Conference and Exhibition Kovscek, A., Tang, G., Vega , B. 2008

  View details for DOI 10.2118/115679-ms

• Modeling Foam Displacement with the Local Equilibrium Approximation: Theory and Experiment Verification SPE Annual Technical Conference and Exhibition Chen, Q., Gerritsen, M. G., Kovscek, A. R. 2008
• Improved Analysis of the Kinetics of Crude-Oil In-Situ Combustion SPE Western Regional Meeting Cinar, M., Castanier, L. M., Kovscek, A. R. 2008
• Correlation of Cold Production Behavior with Acid/Base Number and Asphaltene Content of Heavy Oil, SPE 114196 Proceedings of the SPE Western Regional Meeting, Bakersfield, CA. 31 Mar - 2 Apr 2008 Peng, J., Tang, G. Q., Kovscek, A. R. 2008
• A pore-network-modeling approach to predict petrophysical properties of diatomaceous reservoir rock 2005 SPE Western Regional Meeting Jia, L., Ross, C. M., Kovscek, A. R. SOC PETROLEUM ENG. 2007: 597–608

  View details for Web of Science ID 000252462300003

• Verification of Roof snap off as a foam-generation mechanism in porous media at steady state COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Kovscek, A. R., Tang, G., RADKE, C. J. 2007; 302 (1-3): 251-260

  View details for DOI 10.1016/j.colsurfa.2007.02.035

  View details for Web of Science ID 000247192300037

• Forced imbibition in natural porous media: Comparison between experiments and continuum models PHYSICAL REVIEW E Riaz, A., Tang, G., Tchelepi, H. A., Kovscek, A. R. 2007; 75 (3)

  Abstract

  A well-characterized set of large-scale laboratory experiments is presented, illustrating forced imbibition displacements in the presence of irreducible wetting phase saturation in a cylindrical, homogeneous Berea sandstone rock. Experiments are designed to operate in the regime of compact microscopic flows and large-scale viscous instability. The distribution of fluid phases during the flow process is visualized by high-resolution computed tomography imaging. Linear stability analysis and high-accuracy numerical simulations are employed to analyze the ability of macroscopic continuum equations to provide a consistent approximation of the displacement process. The validity of the equilibrium relative permeability functions, which form the basis for the continuum model, is fundamentally related to the stability of the displacement process. It is shown that not only is the stable flow regime modeled accurately by existing continuum models, but the onset of instability as well as the initial unstable modes are also determined with reasonable accuracy for unstable flows. However, the continuum model is found to be deficient in the case of fully developed unstable flows.

  View details for DOI 10.1103/PhysRevE.75.036305

  View details for PubMedID 17500789

• Sorption-Induced Permeability Change of Coal During Gas-Injection Processes, SPE-109855 , Proceedings of the SPE Annual Technical Conference and Exhibition, Anaheim, CA Lin, W., Tang, G. Q., Kovscek, A. R. 2007
• Overview-Heavy Oil Journal of Petroleum Technology Kovscek, A. R. 2007; 59 (4): 82
• Effects of Reservoir Heterogeneities on the Steam-Assisted Gravity Drainage Process SPE Annual Technical Conference and Exhibition Chen, Q., Gerritsen, M. G., Kovscek, A. R. 2007
• Multicomponent Sorption Modeling in ECBM Displacement Calculations SPE Annual Technical Conference and Exhibition Jessen, K., Tang, G., Kovscek, A. R. 2007
• Oil Recovery and Fracture Reconsolidation of Diatomaceous Reservoir Rock by Water Imbibition at High Temperature SPE Annual Technical Conference and Exhibition Ikeda, M., Tang, G., Ross, C. M., Kovscek, A. R. 2007
• Time-dependent matrix-fracture shape factors for partially and completely immersed fractures JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Rangel-German, E. R., Kovscek, A. R. 2006; 54 (3-4): 149-163

  View details for DOI 10.1016/j.petrol.2006.08.004

  View details for Web of Science ID 000242822300005

• Trapped gas fraction during steady-state foam flow 2004 SPE Annual Technical Conference and Exhibition Tang, G., Kovscek, A. R. SPRINGER. 2006: 287–307

  View details for DOI 10.1007/s11242-005-6093-4

  View details for Web of Science ID 000243647300007

• Estimation of dynamic relative permeability and capillary pressure from countercurrent imbibition experiments TRANSPORT IN POROUS MEDIA Schembre, J. M., Kovscek, A. R. 2006; 65 (1): 31-51

  View details for DOI 10.1007/s11242-005-6092-5

  View details for Web of Science ID 000240724700002

• A laboratory investigation of temperatrue-induced sand consolidation 2005 SPE Western Regional Meeting Ross, C. M., Rangel-German, E. R., Castanier, L. M., Hara, P. S., Kovscek, A. R. SOC PETROLEUM ENG. 2006: 206–15

  View details for Web of Science ID 000238588900008

• Wettability alteration and oil recovery by water imbibition at elevated temperatures 8th International Symposium on Reservoir Wettability Schembre, J. M., Tang, G., Kovscek, A. R. ELSEVIER SCIENCE BV. 2006: 131–48

  View details for DOI 10.1016/j.petrol.2006.03.017

  View details for Web of Science ID 000238929500009

• Heavy-oil solution gas drive in consolidated and unconsolidated rock 2004 SPE International Thermal Operations and Heavy Oil Symposium/Western Regional Meeting Tang, G., Sahni, A., Gadelle, F., Kumar, M., Kovscek, A. R. SOC PETROLEUM ENG. 2006: 259–68

  View details for Web of Science ID 000238588900013

• Interrelationship of temperature and wettability on the relative permeability of heavy oil in diatomaceous rocks 2005 SPE Western Regional Meeting Schembre, J. M., Tang, G., Kovscek, A. R. SOC PETROLEUM ENG. 2006: 239–50

  View details for Web of Science ID 000238440900005

• Nonequilibrium effects during spontaneous imbibition TRANSPORT IN POROUS MEDIA Le Guen, S. S., Kovscek, A. R. 2006; 63 (1): 127-146

  View details for DOI 10.1007/s11242-005-3327-4

  View details for Web of Science ID 000236514700007

• A micromodel investigation of two-phase matrix-fracture transfer mechanisms WATER RESOURCES RESEARCH Rangel-German, E. R., Kovscek, A. R. 2006; 42 (3)

  View details for DOI 10.1029/2004WR003918

  View details for Web of Science ID 000236272800001

• An investigation of the effect of oil composition on heavy-oil solution gas drive 2003 SPE Annual Technical Conference and Exhibition Tang, G. Q., Leung, T., Castanier, L. M., Sahni, A., Gadelle, F., Kumar, M., Kovscek, A. R. SOC PETROLEUM ENG. 2006: 58–70

  View details for Web of Science ID 000236700900005

• Asphaltene deposition during steam-assisted gravity drainage: Effect of non-condensable gases PETROLEUM SCIENCE AND TECHNOLOGY Canbolat, S., Akin, S., Kovscek, A. R. 2006; 24 (1): 69-92

  View details for DOI 10.1081/LFT-200041109

  View details for Web of Science ID 000235050900008

• Laboratory Investigation of the Effect of Solvent Injection on In-Situ Combustion, SPE 99752 Proceedings of the SPE Symposium on Improved Oil Recovery, Tulsa, OK Apr 22-26, 2006 Cristofari, J., Castanier, L. M., Kovscek, A. R. 2006
• Overview -Heavy Oil Journal of Petroleum Technology Kovscek, A. R. 2006; 58 (4): 97
• Laboratory Investigation of the Effect of Solvent Injection on In-Situ Combustion SPE/DOE Symposium on Improved Oil Recovery Cristofari, J., Castanier, L., Kovscek, A. 2006
• The Role of Oil Chemistry on Cold Production of Heavy Oils SPE Annual Technical Conference and Exhibition Tang, G., Temizel, C., Kovscek, A. R. 2006
• Petroleum Coke The World Book Encyclopedia Kovscek, A. R. 2006; 15: X350
• Interpretation of Heat Distribution, Remaining Oil Saturation, and Steamflood Potential of Block Wa38, Liaohe Field, SPE Annual Technical Conference and Exhibition Gao, Y., Castanier, L. M., Kovscek, A. R. 2006
• Time-Dependent Shape Factors for Partially and Completely Immersed Fractures Journal of Petroleum Science and Engineering Rangel-German, E. R., Kovscek, A. R. 2006; 54: 149-163

  View details for DOI 10.1016/jpetrol.2006.08.004

• Mechanism of formation damage at elevated temperature JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME Schembre, J. M., Kovscek, A. R. 2005; 127 (3): 171-180

  View details for DOI 10.1115/1.1924398

  View details for Web of Science ID 000231636600002

• Geologic storage of carbon dioxide and enhanced oil recovery. I. Uncertainty quantification employing a streamline based proxy for reservoir flow simulation ENERGY CONVERSION AND MANAGEMENT Kovscek, A. R., Wang, Y. 2005; 46 (11-12): 1920-1940

  View details for DOI 10.1016/j.enconman.2004.09.008

  View details for Web of Science ID 000228261900018

• Geologic storage of carbon dioxide and enhanced oil recovery. II. Cooptimization of storage and recovery ENERGY CONVERSION AND MANAGEMENT Kovscek, A. R., Cakici, M. D. 2005; 46 (11-12): 1941-1956

  View details for DOI 10.1016/j.enconman.2004.09.009

  View details for Web of Science ID 000228261900019

• Displacement front stability of steam injection into high porosity diatomite rock JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Hoffman, B. T., Kovscek, A. R. 2005; 46 (4): 253-266

  View details for DOI 10.1016/j.petrol.2005.01.004

  View details for Web of Science ID 000228774700004

• A microvisual study of solution-gas-drive mechanisms in viscous oils JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING George, D. S., Hayat, O., Kovscek, A. R. 2005; 46 (1-2): 101-119

  View details for DOI 10.1016/j.petrol.2004.08.003

  View details for Web of Science ID 000226784600007

• Increasing CO2 storage in oil recovery ENERGY CONVERSION AND MANAGEMENT Jessen, K., Kovscek, A. R., Orr, F. M. 2005; 46 (2): 293-311

  View details for DOI 10.1016/j.enconman.20004.02.019

  View details for Web of Science ID 000224606300010

• Laboratory and Simulation Investigation of Enhanced Coalbed Methane Recovery by Gas Injection SPE Annual Technical Conference and Exhibition Tang, G., Jessen, K., Kovscek, A. R. 2005
• A Laboratory Investigation of Temperature Induced Sand Consolidation SPE Western Regional Meeting Ross, C. M., Rangel-German, E. R., Castanier, L. M., Kovscek, A. R. 2005
• Overview-Heavy Oil Journal of Petroleum Technology Kovscek, A. R. 2005; 57 (6): 62
• Matrix Fracture Shape Factors and Multiphase Flow Properties of Fractured Porous Media SPE Latin America and Caribbean Petroleum Engineering Conference Rangel-German, E. R., Kovscek, A. R. 2005
• Improved In-Situ Combustion Performance with Metallic Salt Additives SPE Western Regional Meeting He, B., Chen, Q., Castanier, L. M., Kovscek, A. R. 2005
• Effect of Temperature on Relative Permeability for Heavy-Oil Diatomite Reservoirs SPE Western Regional Meeting Schembre, J. M., Tang, G., Kovscek, A. R. 2005
• A Pore Network Modeling Approach to Predict Petrophysical Propoerties of Diatomaceous Reservoir Rock Proceedings of the SPE Western Regional Meeting Jia, L., Ross, C. M., Kovscek, A. R. 2005: 2005
• A direct sequential simulation approach to streamline-based history matching 7th International Geostatistics Congress Caers, J., Gross, H., Kovscek, A. R. SPRINGER. 2005: 1077–1086

  View details for Web of Science ID 000234961400112

• Electrical-heating-assisted recovery for heavy oil JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Rangel-German, E. R., Schembre, J., Sandberg, C., Kovscek, A. R. 2004; 45 (3-4): 213-231

  View details for DOI 10.1016/j.petrol.2004.06.005

  View details for Web of Science ID 000226452000007

• Noncondensable gas steam-assisted gravity drainage JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Canbolat, S., Akin, S., Kovscek, A. R. 2004; 45 (1-2): 83-96

  View details for DOI 10.1016/j.petrol.2004.04.006

  View details for Web of Science ID 000225705700008

• An experimental investigation of the effect of temperature on recovery of heavy oil from diatomite SPE JOURNAL Tang, G. Q., Kovscek, A. R. 2004; 9 (2): 163-?

  View details for Web of Science ID 000222251600005

• Experiments and analysis of heavy-oil solution-gas drive 2001 SPE Annual Technical Conference and Exhibition Sahni, A., Gadelle, F., Kumar, M., Tomutsa, L., Kovscek, A. R. SOC PETROLEUM ENG. 2004: 217–29

  View details for Web of Science ID 000222433900006

• Efficiency and oil recovery mechanisms of steam injection into low permeability, hydraulically fractured reservoirs PETROLEUM SCIENCE AND TECHNOLOGY Hoffman, B. T., Kovscek, A. R. 2004; 22 (5-6): 537-564

  View details for DOI 10.1081/LFT-120034187

  View details for Web of Science ID 000221834300005

• Measurement and Theory of Gas Trapping in Porous Media During Steady-State Foam Flow SPE Annual Technical Conference and Exhibition, Tang, G., Kovscek, A. R. 2004
• Heavy-Oil Solution Gas Drive in Consolidated and Unconsolidated Rock SPE International Thermal Operations and Heavy Oil Symposium and Western Regional Meeting Tang, G., Sahni, A., Gadelle, F., Kumar, M., Kovscek, A. R. 2004
• Experimental Investigation and High Resolution Simulator of In-Situ Combustion: 1. Simulator Design and Improved Combustion With Metallic Additives SPE International Thermal Operations and Heavy Oil Symposium and Western Regional Meeting Gerritsen, M., Kovscek, A. R., Castanier, L., Nilsson, J., Younis , R., He, B. 2004
• Thermally Induced Fines Migration: Its Relationship to Wettability and Formation Damage, SPE 86937 SPE International Thermal Operations and Heavy Oil Symposium and Western Regional Meeting Schembre, J. M., Kovscek, A. R. 2004
• Steamdrive Stability in High Porosity Rock SPE International Thermal Operations and Heavy Oil Symposium and Western Regional Meeting Hoffman, B. T., , B. T., Kovscek, A. R., A. R. 2004
• Code Intercomparison Builds Confidence in Numerical Simulation Models for Geologic Disposal of CO2 Energy Pruess, K., GarcÌa, J., Kovscek, A. R., C. Oldenburg, .J. Rutqvist, Steefel, C., Xu, T. 2004; 29: 1431-1444
• Experimental Determination of Time-Dependent Matrix-Fracture Shape Factors for Different Geometries and Fracture Filling Regimes, SPE 92131 SPE International Petroleum Conference Chaobal, A., , A., Rangel-German, E. R., , E. R., Kovscek, A. R., A. R. 2004
• Streamline-Based History Matching Using Geostatistical Constraints: Application to a Giant Mature Carbonate Reservoir SPE Annual Technical Conference and Exhibition Gross, H., Thiele, M. R., Alexa, M. J., Caers, J. K., Kovscek, A. R. 2004
• Microvisual Analysis of Matrix-Fracture Interaction SPE International Petroleum Conference in Mexico Rangel-German, E. R., Kovscek, A. R. 2004
• Analytical theory of coalbed methane recovery by gas injection 2002 SPE/DOE Improved Oil Recovery Symposium Zhu, J. C., Jessen, K., Kovscek, A. R., Orr, F. M. SOC PETROLEUM ENG. 2003: 371–79

  View details for Web of Science ID 000187862600006

• Special issue - Honoring Professor W.E. Brigham - Preface JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Kovscek, A. R. 2003; 39 (1-2): 1-3

  View details for DOI 10.1016/S0920-4105(03)00036-6

  View details for Web of Science ID 000184635600001

• A technique for measuring two-phase relative permeability in porous media via X-ray CT measurements Brigham Symposium Schembre, J. M., Kovscek, A. R. ELSEVIER SCIENCE BV. 2003: 159–74

  View details for DOI 10.1016/S0920-4105(03)00046-9

  View details for Web of Science ID 000184635600011

• Foam mobility in heterogeneous porous media - (II: Experimental observations) TRANSPORT IN POROUS MEDIA Kovscek, A. R., Bertin, H. J. 2003; 52 (1): 37-49

  View details for Web of Science ID 000181013100003

• Foam mobility in heterogeneous porous media - (I: Scaling concepts) TRANSPORT IN POROUS MEDIA Kovscek, A. R., Bertin, H. J. 2003; 52 (1): 17-35

  View details for Web of Science ID 000181013100002

• A mechanistic modeling and experimental study of solution gas drive TRANSPORT IN POROUS MEDIA Arora, P., Kovscek, A. R. 2003; 51 (3): 237-265

  View details for Web of Science ID 000181013000001

• Integrating production history into reservoir models using streamline-based time-of-flight ranking PETROLEUM GEOSCIENCE Wang, Y., Kovscek, A. R. 2003; 9 (2): 163-174

  View details for Web of Science ID 000183733800005

• Pressure-driven capillary snap-off of gas bubbles at low wetting-liquid content COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Kovscek, A. R., RADKE, C. J. 2003; 212 (2-3): 99-108

  View details for Web of Science ID 000180543600001

• Light-Oil Steamdrive in Fractured Low Permeability Reservoirs SPE Western Region/AAPG Pacific Section Joint Meeting Hoffman, B. T., Kovscek, A. R. 2003
• Computed Tomography in Petroleum Engineering Research Geological Society, London, Special Publications Akin, S., Kovscek, A. R. 2003; 215: 23-28

  View details for DOI 10.1144/GSL.SP.2003.215.01.03

• Time-Dependent Matrix-Fracture Shape Factors for Partially and Completely Immersed Fractures, SPE 84411 Proceedings of the SPE Annual Technical Conference and Exhibition, Denver, CO Oct. 5-8 Rangel-German, E. R., Kovscek, A. R. 2003
• Analytical Solutions for Coal-Bed Methane Displacement by Gas Injection SPE Journal Zhu, J., Jessen, K., Kovscek, A. R., Orr Jr., F. M. 2003; 8 (4)
• ime Dependent Shape Factors for Uniform and Non-Uniform Pressure Boundary Conditions Geothermal Resources Council Annual Meeting Rangel-German, E. R., Kovscek, A. R., Akin, S. 2003
• Computed Tomography in Petroleum Engineering Research Applications of X-ray Computed Tomography in the Geosciences Akin, S., Kovscek, A. R. edited by Mees, F., Swennen, R., Van Geet, M., Jacobs, P. Geological Society Publications. 2003
• An Investigation of the Effect of Oil Composition on Heavy Oil Solution Gas Drive SPE Annual Technical Conference and Exhibition Tang, G., Leung, Y., Castanier, L. M., Sahni, A., Gadelle, F., Kumar, M., Kovscek, A. R. 2003: 2003
• Experimental and analytical study of multidimensional imbibition in fractured porous media JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Rangel-German, E. R., Kovscek, A. R. 2002; 36 (1-2): 45-60

  View details for Web of Science ID 000178598800004

• A geostatistical approach to streamline-based history matching SPE JOURNAL Caers, J., Krishnan, S., Wang, Y. D., Kovscek, A. R. 2002; 7 (3): 250-266

  View details for Web of Science ID 000178119400004

• Heavy-oil solution gas drive: a laboratory study JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Akin, S., Kovscek, A. R. 2002; 35 (1-2): 33-48

  View details for Web of Science ID 000177167200003

• Scaling of counter-current imbibition processes in low-permeability porous media 6th International Symposium on Reservoir Wettability and Its Effect on Oil Recovery Zhou, D., Jia, L., Kamath, J., Kovscek, A. R. ELSEVIER SCIENCE BV. 2002: 61–74

  View details for Web of Science ID 000175595000007

• Screening criteria for CO2 storage in oil reservoirs PETROLEUM SCIENCE AND TECHNOLOGY Kovscek, A. R. 2002; 20 (7-8): 841-866

  View details for DOI 10.1081/LFT-120003717

  View details for Web of Science ID 000177317900013

• Analytical Solutions for Coal-Bed Methane Displacement by Gas Injection, SPE 75255 Proceedings of the SPE/DOE Thirteenth Symposium on Improved Oil Recovery, Tulsa, OK April 13-17 Zhu, J., Jessen, K., Kovscek, A. R., Orr, Jr., F. M. 2002
• Petroleum Recovery Encyclopedia of Petroleum Science and Engineering Kovscek, A. R. edited by Speight, J. G. Marcel Dekker, New York. 2002
• Wettability Alteration of Diatomite Induced by Hot-Fluid Injection SPE Annual Technical Conference and Exhibition Tang, G., Kovscek, A. R. 2002
• Polymer Augmented Waterflooding Encyclopedia of Petroleum Science and Engineering Kovscek, A. R. edited by Speight, J. G. Marcel Dekker, New York. 2002
• A Study of Steam-Assisted Gravity Drainage Performance in the Presence of Noncondensable Gases SPE/DOE Improved Oil Recovery Symposium Serhat, C., Serhat, A., Kovscek, A. 2002

  View details for DOI 10.2118/75130-ms

• Immiscible Carbon Dioxide Displacement Encyclopedia of Petroleum Science and Engineering Kovscek, A. R. edited by Speight, J. G. Marcel Dekker, New York. 2002
• Mechanistic Modeling of Solution-Gas Drive in Viscous Oils Journal of Petroleum Technology Arora, P., Kovscek, A. R. 2002; 53 (6): 48-49
• Experimental Study of Heavy Oil Production from Diatomite Core at Elevated Temperatures SPE/DOE Thirteenth Symposium on Improved Oil Recovery Tang, G. Q., Kovscek, A. R. 2002
• Estimation of Foam Mobility in Heterogeneous Porous Media SPE/DOE Thirteenth Symposium on Improved Oil Recovery Kovscek, A. R., , A. R., Bertin, H. J., H. J. 2002
• Pore Microstructure and Fluid Distribution in a Diatomaceous Reservoir SPE/DOE Thirteenth Symposium on Improved Oil Recovery, Ross, C. M., Kovscek, A. R. 2002
• A Streamline Approach for Ranking Reservoir Models that Incorporates Production History SPE Annual Technical Conference and Exhibition Wang, Y., Kovscek, A. R. 2002
• Surfactant concentration and end effects on foam flow in porous media TRANSPORT IN POROUS MEDIA Apaydin, O. G., Kovscek, A. R. 2001; 43 (3): 511-536

  View details for Web of Science ID 000169522500006

• A numerical analysis of the single-well steam assisted gravity drainage process (SW-SAGD) PETROLEUM SCIENCE AND TECHNOLOGY Elliot, K. T., Kovscek, A. R. 2001; 19 (7-8): 733-760

  View details for Web of Science ID 000171635500001

• An Investigation of Counter-Current Imbibition Processes in Diatomite SPE Western Regional Meeting Zhou, D., Jia, L., Kamath, J., Kovscek, A. R. 2001
• Increasing CO2 Storage in Oil Recovery First National Conference on Carbon Sequestration Jessen, K., Sam-Olibale, L. C., Kovscek, A. R., Orr, F. M. 2001
• Water Infiltration in Fractured Systems: Experiments and Analytical Model SPE Annual Technical Conference and Exhibition Rangel-German, E. R., Kovscek, A. R. 2001
• Direct Measurement of Dynamic Relative Permeability from CT-Monitored Spontaneous Imbibition Experiments SPE Annual Technical Conference and Exhibition Schembre, J. M., Kovscek, A. R. 2001
• Countercurrent Imbibition Processes in Diatomite Journal of Petroleum Technology Zhou, D., Jia, L., Kamath, J., Kovscek, A. R. 2001; 53: 44
• Mechanistic Modeling of Solution Gas Drive in Viscous Oils SPE International Thermal Operations and Heavy Oil Symposium Arora, P., Kovscek, A. R. 2001
• Porosity and permeability evolution accompanying hot fluid injection into diatomite PETROLEUM SCIENCE AND TECHNOLOGY Diabira, I., Castanier, L. M., Kovscek, A. R. 2001; 19 (9-10): 1167-1185

  View details for Web of Science ID 000172825800010

• Streamline approach for history matching production data SPE JOURNAL Wang, Y., Kovscek, A. R. 2000; 5 (4): 353-362

  View details for Web of Science ID 000165780400002

• Spontaneous imbibition characteristics of diatomite JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Akin, S., Schembre, J. M., Bhat, S. K., Kovscek, A. R. 2000; 25 (3-4): 149-165

  View details for Web of Science ID 000087327000004

• Matrix-Fracture Interactions in Single Matrix Blocks, Twenty-Fifth Workshop on Geothermal Reservoir Engineering Rangel-German, E. R., Kovscek, A. R. 2000
• Transient Foam Flow in Homogeneous Porous Media: Surfactant Concentration and End Effects SPE/DOE Improved Oil Recovery Symposium Apaydin, O. G., Kovscek , A. R. 2000
• An Experimental Investigation of Permeability and Porosity Alteration in Diatomite During Hot Fluid Injection SPE Western Regional Meeting Kovscek, A. R., Diabira, I., Castanier, L. M. 2000
• A Streamline Approach for History Matching Production Data SPE 59370 SPE/DOE Improved Oil Recovery Symposium, Tulsa, OK April 3-5 Wang, Y., Kovscek, A. R. 2000
• Foam Flow in Heterogeneous Porous Media: Effect of Cross Flow SPE JOURNAL Bertin, H. J., Apaydin, O. G., Castanier, L. M., Kovscek, A. R. 1999; 4 (2): 75-82

  View details for Web of Science ID 000209016800001

• Effect of mobility ratio on pattern behavior of a homogeneous porous medium IN SITU Wang, Y., Kovscek, A. R., Brigham, W. E. 1999; 23 (1): 1-20

  View details for Web of Science ID 000079297100001

• A Numerical Analysis of the Single-Well Steam Assisted Gravity Drainage 20th Annual International Energy Agency Workshop and Symposium Elliot, K. E., Kovscek, A. R. 1999
• Simulation of Early-Time Response of Single- Well Steam Assisted Gravity Drainage SPE Western Regional Meeting Elliot, K. E., Kovscek, A. R. 1999
• Imbibition Studies in Low-Permeability Porous Media SPE Western Regional Meeting Akin, S., Kovscek, A. R. 1999
• Foam flow in heterogeneous porous media: Effect of crossflow SPE/DOE Improved Oil Recovery Symposium Bertin, H. J., Apaydin, O. G., Castanier, L. M., Kovscek, A. R. 1999: 75–82
• Statistical network theory of silica deposition and dissolution in diatomite IN SITU Bhat, S. K., Kovscek, A. R. 1999; 23 (1): 21-53

  View details for Web of Science ID 000079297100002

• Permeability modification of diatomite during hot-fluid injection Journal of Petroleum Technology Bhat, S. K., Kovscek, A. R. 1998; 50: 98-100
• Spontaneous water imbibition into diatomite SPE Western Regional Meeting Schembre, J. M., Akin, S., Castanier, L. M., Kovscek, A. R. 1998
• Effect of mobility ratio on areal sweep efficiency and pattern flood behavior 19th Annual International Energy Agency Workshop and Symposium Wang, Y., Kovscek, A. R., Brigham, W. E. 1998
• Foam flow in heterogeneous porous media: Effect of crossflow. SPE 39678 SPE/DOE Improved Oil Recovery Symposium, Tulsa Bertin, H. J., Apaydin, O. G., Castanier, L. M., Kovscek, A. R. 1998
• Reservoir simulation of foam displacement processes 7th UNITAR International Conference on Heavy Crude and Tar Sands Kovscek, A. R. 1998
• Permeability modification of diatomite during hot fluid injection SPE Western Regional Meeting Bhat, S. K., Kovscek, A. R. 1998
• Evaluation of rock/fracture interactions during steam injection through vertical hydraulic fractures 1995 SPE Western Regional Meeting Kovscek, A. R., Johnston, R. M., Patzek, T. W. SOC PETROLEUM ENG. 1997: 100–105

  View details for Web of Science ID A1997WZ49200007

• Gas bubble snap-off under pressure-driven flow in constricted noncircular capillaries COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Kovscek, A. R., RADKE, C. J. 1996; 117 (1-2): 55-76

  View details for Web of Science ID A1996VJ28400007

• Interpretation of hydrofracture geometry during steam injection using temperature transients .2. Asymmetric hydrofractures IN SITU Kovscek, A. R., Johnston, R. M., Patzek, T. W. 1996; 20 (3): 289-309

  View details for Web of Science ID A1996VD09500003

• Interpretation of hydrofracture geometry during steam injection using temperature transients .1. Model formulation and verification IN SITU Kovscek, A. R., Johnston, R. M., Patzek, T. W. 1996; 20 (3): 251-288

  View details for Web of Science ID A1996VD09500002

• Dividing oil fields into regions with similar characteristic behavior using neural network and fuzzy logic approaches 1996 Biennial Conference of the North-American-Fuzzy-Information-Processing-Society Nikravesh, M., Kovscek, A. R., Patzek, T. W. I E E E. 1996: 164–169

  View details for Web of Science ID A1996BF95N00032

• A MECHANISTIC POPULATION BALANCE MODEL FOR TRANSIENT AND STEADY-STATE FOAM FLOW IN BOISE SANDSTONE CHEMICAL ENGINEERING SCIENCE Kovscek, A. R., Patzek, T. W., RADKE, C. J. 1995; 50 (23): 3783-3799

  View details for Web of Science ID A1995TK32000010

• FOAM FLOW-THROUGH A TRANSPARENT ROUGH-WALLED ROCK FRACTURE JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING Kovscek, A. R., Tretheway, D. C., Persoff, P., RADKE, C. J. 1995; 13 (2): 75-86

  View details for Web of Science ID A1995RF53300001

• FUNDAMENTALS OF FOAM TRANSPORT IN POROUS-MEDIA FOAMS: FUNDAMENTALS AND APPLICATIONS IN THE PETROLEUM INDUSTRY Kovscek, A. R., RADKE, C. J. 1994; 242: 115-163

  View details for Web of Science ID A1994BB26W00003

• A PORE-LEVEL SCENARIO FOR THE DEVELOPMENT OF MIXED WETTABILITY IN OIL-RESERVOIRS AICHE JOURNAL Kovscek, A. R., Wong, H., RADKE, C. J. 1993; 39 (6): 1072-1085

  View details for Web of Science ID A1993LF90900015