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Research Output

2018

Can CO2 enhanced oil recovery give new life to Illinois Basin fields?

Ellett, K. M. & Okwen, R. T., 2018, Abstracts with Programs - Geological Society of America. Vol. 50:6.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Challenging Geostatistical Methods To Represent Heterogeneity in CO2 Reservoirs Under Residual Trapping

Damico, J. R., Ritzi, R. W., Gershenzon, N. I. & Okwen, R. T., 2018, In : Environmental and Engineering Geoscience. 24, 4, p. 357-373 17 p.

Research output: Contribution to journalArticle

Feasibility of a Deep Direct-Use Geothermal System at the University of Illinois Urbana-Champaign

Stumpf, A., Damico, J., Okwen, R., Stark, T., Elrick, S., Nelson, W. J., Lu, Y., Holcomb, F., Tinjum, J., Yang, F., Frailey, S. & Lin, Y-F., 2018.

Research output: Contribution to conferencePaper

2017

Capillary trapping of CO2 in heterogeneous reservoirs during the injection period

Gershenzon, N. I., Ritzi, R. W., Dominic, D. F., Mehnert, E. & Okwen, R. T., Apr 1 2017, In : International Journal of Greenhouse Gas Control. 59, p. 13-23 11 p.

Research output: Contribution to journalArticle

CO2 trapping in reservoirs with fluvial architecture: Sensitivity to heterogeneity in permeability and constitutive relationship parameters for different rock types

Gershenzon, N. I., Ritzi, R. W., Dominic, D. F., Mehnert, E., Okwen, R. T. & Patterson, C., Jan 1 2017, In : Journal of Petroleum Science and Engineering. 155, p. 89-99 11 p.

Research output: Contribution to journalArticle

2016

CO2 trapping in reservoirs with fluvial sedimentary architecture

Gershenzon, N. I., Ritzi, R. W., Dominic, D. F., David F., O., Mehnert, E. & Patterson, C., 2016, Abstracts with Programs - Geological Society of America. 5 ed. Champaign, IL, Vol. 48.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Comparison of CO2 trapping in highly heterogeneous reservoirs with Brooks-Corey and van Genuchten type capillary pressure curves

Gershenzon, N. I., Ritzi, R. W., Dominic, D. F., Mehnert, E. & Okwen, R. T., Oct 1 2016, In : Advances in Water Resources. 96, p. 225-236 12 p.

Research output: Contribution to journalArticle

Effect of model complexity and relative permeability inputs on geologic carbon sequestration modeling

Mehnert, E., Chen, Y., Gershenzon, N. I., Kohanpur, A. H., Valocchi, A. J., Okwen, R. T., Patterson, C., Ritzi, J. & Robert W., 2016, Abstracts with Programs - Geological Society of America. Champaign, IL, Vol. 48:5.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Geochemical modeling of Mt. Simon brine extraction and reinjection for plume pressure management

Berger, P. M., Okwen, R. T. & Dastgheib, S. A., 2016, Abstracts with Programs - Geological Society of America. Champaign, IL, Vol. 48:5.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liquid CO2 EOR potential in the Illinois Basin: Results of the Mumford Hills pilot

Okwen, R. T. & Frailey, S. M., Jan 1 2016, Society of Petroleum Engineers - SPE Improved Oil Recovery Conference. Society of Petroleum Engineers (SPE), (SPE - DOE Improved Oil Recovery Symposium Proceedings; vol. 2016-January).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liquid CO2 EOR Potential in the Illinois Basin: Results of the Mumford Hills Pilot

Okwen, R. T. & Frailey, S. M., 2016, SPE Improved Oil Recovery Conference. Society of Petroleum Engineers, p. 1--13

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2015

Assessing CO2 EOR Potential of Three Strategically Located Oil Fields in the Illinois Basin

Damico, J. R., Monson, C. C., Frailey, S. M., Lasemi, Y., Webb, N. D., Grigsby, N. P., Yang, F., Okwen, R. T., Zhou, R., Freiburg, J. T., Freiburg, J. T. & Berger, P. M., 2015, Eastern Section Meeting. Indianapolis, IN

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Capillary trapping of CO (sub 2) in reservoirs with fluvial architecture

Ritzi, R. W., Gershenzon, N. I., Dominic, D. F., Mehnert, E. & Okwen, R. T., 2015, Abstracts with Programs - Geological Society of America. Boulder, CO: Geological Society of America, Vol. 47. p. 322

Research output: Chapter in Book/Report/Conference proceedingConference contribution

CO2 trapping in reservoirs with fluvial architecture; sensitivity to heterogeneity and hysteresis in characteristic relationships for different rock types

Gershenzon, N. I., Ritzi, R. W., Dominic, D. F., Mehnert, E. & Okwen, R. T., 2015, AGU 2015 fall meeting. Vol. 2015.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Influence of small-scale fluvial architecture on CO2 trapping processes in deep brine reservoirs

Gershenzon, N. I., Ritzi, R. W., Dominic, D. F., Soltanian, M., Mehnert, E. & Okwen, R. T., Oct 2015, In : Water Resources Research. 51, 10, p. 8240-8256 17 p.

Research output: Contribution to journalArticle

The impact of model complexity on CO2 saturation and mass balance

Mehnert, E., Gershenzon, N. I., Kohanpur, A. H., Okwen, R. T., Patterson, C., Ritzi, R. W. & Valocchi, A. J., 2015, AGU 2015 fall meeting. Vol. 2015.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2014

Basin-scale modeling for CO2 sequestration in the basal sandstone reservoir of the Illinois Basin-improving the geologic model

Mehnert, E., Damico, J., Frailey, S., Leetaru, H., Okwen, R., Storsved, B. & Valocchi, A., Jan 1 2014, In : Energy Procedia. 63, p. 2949-2960 12 p.

Research output: Contribution to journalConference article

Effect of geologic depositional environment on CO2 storage efficiency

Okwen, R., Yang, F. & Frailey, S., Jan 1 2014, In : Energy Procedia. 63, p. 5247-5257 11 p.

Research output: Contribution to journalConference article

Quantifying CO (sub 2) storage efficiencies of geologic depositional environments

Okwen, R. T., Monson, C. C., Lasemi, Y. & Grigsby, N. P., 2014, Abstracts - AAPG, Eastern Section Meeting. American Association of Petroleum Geologists, Vol. 43.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Transport modeling at multiple scales for the Illinois Basin-Decatur Project

Roy, W. R., Mehnert, E., Berger, P. M., Damico, J. R. & Okwen, R. T., Jan 1 2014, In : Greenhouse Gases: Science and Technology. 4, 5, p. 645-661 17 p.

Research output: Contribution to journalArticle

2013
2012

Alkaline-surfactant-polymer flood application for enhanced oil recovery has potential for significant recovery of remaining reserves in the mature Lawrence Field, Illinois

Grube, J. P., Blakley, C. S., Damico, J. R., Johanek, P. M., Madhavan, V., Okwen, R. T., Seyler, B. J. & Webb, N. D., 2012, Abstracts: Annual Meeting - American Association of Petroleum Geologists. Tulsa, OK: American Association of Petroleum Geologists, Vol. 2012.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

CONJUNCTIVE INJECTION OF CO2 AND WASTEWATER IN A HETEROGENEOUS POROUS FORMATION

Okwen, R. T., Thomas, M., Stewart, M. T., Trotz, M. & Cunningham, J. A., 2012, In : Technology & Innovation. 14, 2, p. 143--151

Research output: Contribution to journalArticle

Near-Well Pressure Distribution of CO2 Injection in a Partially Penetrating Well

Mehnert, E. & Okwen, R. T., 2012, p. 681--688.

Research output: Contribution to conferenceOther

2011

Analytical model for screening potential CO2 repositories

Okwen, R. T., Stewart, M. T. & Cunningham, J. A., Sep 1 2011, In : Computational Geosciences. 15, 4, p. 755-770 16 p.

Research output: Contribution to journalArticle

Effect of Well Orientation (Vertical vs. Horizontal) and Well Length on the Injection of CO2 in Deep Saline Aquifers

Okwen, R., Stewart, M. & Cunningham, J., Oct 1 2011, In : Transport in Porous Media. 90, 1, p. 219-232 14 p.

Research output: Contribution to journalArticle

Far field pressure monitoring well spacing in open basins with multiple sequestration sites

Mehnert, E., Okwen, R. T., Frailey, S. M. & Damico, J. R., 2011, American Geophysical Union Fall Meeting. Washington, DC: American Geophysical Union, Vol. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Overview of activities for an EOR carbon sequestration pilot within the Illinois Basin

Monson, C. C., Damico, J. R., Okwen, R. T. & Grube, J. P., 2011, Abstracts with Programs - Geological Society of America. Boulder, CO: Geological Society of America, Vol. 43. p. 314

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Remote sensing of temperature variations around major power plants as point sources of heat

Okwen, R., Pu, R. & Cunningham, J., Jul 2011, In : International Journal of Remote Sensing. 32, 13, p. 3791-3805 15 p.

Research output: Contribution to journalArticle

Simultaneous injection of wastewater and CO (sub 2) in a heterogeneous aquifer

Okwen, R. T., Thomas, M. W., Stewart, M., Trotz, M. & Cunningham, J. A., 2011, American Geophysical Union Fall Meeting. Washington, DC: American Geophysical Union, Vol. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Temporal variations in near-wellbore pressures during CO2 injection in saline aquifers

Okwen, R. T., Stewart, M. T. & Cunningham, J. A., Sep 1 2011, In : International Journal of Greenhouse Gas Control. 5, 5, p. 1140-1148 9 p.

Research output: Contribution to journalArticle

2010

Analytical solution for estimating storage efficiency of geologic sequestration of CO2

Okwen, R. T., Stewart, M. T. & Cunningham, J. A., Jan 1 2010, In : International Journal of Greenhouse Gas Control. 4, 1, p. 102-107 6 p.

Research output: Contribution to journalArticle

2006

Formation damage by CO 2-induced asphaltene precipitation

Okwen, R. T., May 9 2006.

Research output: Contribution to conferencePaper

Formation damage by CO 2-lnduced asphaltene precipitation

Okwen, R. T., May 22 2006, p. 291-302. 12 p.

Research output: Contribution to conferencePaper