20062018
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Research Output 2006 2018

2018

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

trapping
permeability
method
preferential flow
connectivity

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

Sandstone
Geothermal energy
Fluids
Flow rate
Heat losses
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

trapping
Rocks
Capillarity
Viscous flow
Wetting

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

trapping
Dissolution
Rocks
permeability
Capillarity
2016

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

capillary pressure
trapping
plume
saturation
hysteresis

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), Vol. 2016-January. (SPE - DOE Improved Oil Recovery Symposium Proceedings; vol. 2016-January).

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

Oils
Recovery
Liquids
Temperature
Oil fields
2015

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

brine
trapping
capillary pressure
hysteresis
permeability
2014

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

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

Research output: Contribution to journalConference article

Geologic models
Sandstone
Carbon
Temperature

Effect of geologic depositional environment on CO 2 storage efficiency

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

Research output: Contribution to journalConference article

Carbonates
Reefs
Flow simulation
Oil fields
Hydraulics

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

Carbon Monoxide
Carbon
Minerals
Porosity
Simulators
2013
Sandstone
Carbon
Shale
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

repository
Repository
Analytical Model
Screening
Saturation

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

Horizontal wells
Aquifers
Anisotropy
Solubility

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

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

Research output: Contribution to journalArticle

point source
power plant
remote sensing
fossil
land surface

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 journalReview article

Aquifers
temporal variation
Carbon dioxide
aquifer
carbon dioxide
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

Aquifers
brine
Buoyancy
aquifer
buoyancy
2006

Formation damage by CO 2-induced asphaltene precipitation

Okwen, R. T., May 9 2006.

Research output: Contribution to conferencePaper

asphaltene
Asphaltenes
Limestone
crude oil
Crude oil

Formation damage by CO 2-lnduced asphaltene precipitation

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

Research output: Contribution to conferencePaper

asphaltene
Enhanced recovery
damage
Asphaltenes
Petroleum reservoirs