Advanced reservoir characterization in the Antelope Shale to establish the viability of CO(sub 2) enhanced oil recovery in California's Monterey Formation siliceous shales. Quarterly progress report, January 1--March 31, 1998

摘要

The primary objective of this research is to conduct advanced reservoir characterization and modeling studies in the Antelope Shale reservoir. Characterization studies will be used to determine the technical feasibility of implementing a CO(sub 2) enhanced oil recovery project in the Antelope Shale in Buena Vista Hills Field. The Buena Vista Hills pilot CO(sub 2) project will demonstrate the economic viability and widespread applicability of CO(sub 2) flooding in fractured siliceous shale reservoirs of the San Joaquin Valley. The research consists of four primary work processes: Reservoir Matrix and Fluid Characterization; Fracture Characterization; Reservoir Modeling and Simulation; and CO(sub 2) Pilot Flood and Evaluation. Work done in these areas is subdivided into two phases or budget periods. The first phase of the project focused on the application of a variety of advanced reservoir characterization techniques to determine the production characteristics of the Antelope Shale reservoir. Reservoir models based on the results of the characterization work will be used to evaluate how the reservoir will respond to secondary recovery and EOR processes. The second phase of the project will include the implementation and evaluation of an advanced enhanced oil recovery (EOR) pilot in the United Anticline (West Dome) of the Buena Vista Hills Field. Progress to date is described.