Fracture mapping and feasibility of monitoring CO2 in situ from seismic data at the Mississippian Carbonate Reservoir, Wellington oil field, south-central Kansas

A CO2 injecGon pilot study was conducted by the Kansas Geological Survey in spring of 2016 to determine the feasibility of CO2 for EOR. A 3D seismic survey and two 2D seismic lines were acquired pre-injecGon, with a final 2D seismic line acquired post-injecGon. The Mississippian is a heterogeneous low resisGvity-high porosity reservoir, which primarily consists of cherty dolomite. The Arbuckle is comprised of stacked aquifers and aquitards, and is non-producing of oil or gas in the Wellington field (Watney et al, 2001). These carbonates exhibit anisotropy due to varied crystalline structure, porosity geometry, and micro-fracture. The heterogeneity of the reservoirs makes the seismic analysis challenging; however, addiGonal well control and seismic data supplement the modeling effort.