Kansas Geological Survey, Open-file Report 2005-24
by Abdelmoneam E. Raef, Richard D. Miller, Alan P. Byrnes, William E. Harrison, and Evan K. Franseen
KGS Open-file Report 2005-24
Presented at the 2005 Annual Meeting of the AAPG, Calgary, Canada.
Aug. 2005
Efficiency of enhanced oil recovery (EOR) programs relies heavily on accurate reservoir models. Movement of miscible carbon dioxide (CO2) injected into a thin (approx. 5 m), shallow-shelf, oomoldic carbonate reservoir around 900 m deep in Russell County, Kansas, was successfully monitored using high-resolution 4D/time-lapse seismic techniques. High resolution seismic methods showed great potential for incorporation into CO2-flood management, highlighting the necessity of frequently updated reservoir-simulation models, especially for carbonates. Use of an unconventional approach to acquisition and interpretion of the high-resolution time-lapse/4D seismic data was key to the success of this monitoring project.
Weak-anomaly enhancement of selected non-inversion, 4D-seismic attribute data represented a significant interpretation development and proved key to seismic monitoring of CO2 movement. Also noteworthy was the improved definition of hetrogeneities affecting the expanding flood bank. Among other findings, this time-lapse seismic feasibility study demonstrated that miscible CO2 injected into a shallow, thin carbonate reservoir could be monitored, even below the classic temporal seismic resolution limits.
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Kansas Geological Survey, Geophysics
Placed online Sept. 27, 2005
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