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Reservoir Engineering Aspects of Pilot Scale CO2 EOR Project in Upper Mississippian Formation at Wellington Field in Southern Kansas

Yevhen Holubnyak, Lynn Watney, Jason Rush, John Doveton, and Mina Fazel Alavi

A DOE sponsored pilot-scale project has been funded in which 30,000 metric tons of CO2 will be injected in the upper part of the Mississippian reservoir to verify EOR potential at Berexco Wellington field in Sumner County, KS. The Mississippian Formation has generated a lot of interest from industry due to tertiary oil and gas recovery potential which became economically feasible in current conditions. Over 2.4 TCF gas and 278 MMBO have been produced in south-central Kansas from Mississippian reservoirs including 20 MMBO at Wellington Field. The main objective of this work is to evaluate reservoir properties, predict reservoir response, evaluate possible risks, and to propose the best CO2 EOR scenario for the Mississippian reservoir at Wellington Field. Another objective is to test the feasibility for the CO2 EOR of the larger scale. Mississippian cycles at Wellington Field consist of siliceous or cherty dolomites that range from dark argillaceous dolo-siltites to porous packstone lithofacies. Multicomponent 3D seismic (depth migrated and shear wave) interpretations are being incorporated with log and core data to produce a detailed 3D geological model. The data from this model was upscaled to produce a CMG compositional model. Predictive simulations, sensitivity studies, and historical matching of the water flooding and other stimulation activities in the field were performed with the CMG CMOST and GEM software. 

AAPG Search and Discovery Article #90176©AAPG Mid-Continent Meeting, Wichita, Kansas, October 12-15, 2013