Integrated Three-Dimensional Seismic and Three-Dimensional Reservoir Flow Simulation Exposes the Effects of Faulting on Coal Gas Production at Cedar Hill

Abstract

Abstract This study used an integrated approach to characterize the Cedar Hill field, a naturally-fractured coalbed methane reservoir, through use of a three-dimensional flow model, three-dimensional multicomponent seismic survey, and detailed engineering and geologic analyses. Results indicate that faulting influences reservoir production and illustrate the importance of a multidisciplinary approach in the characterization of coalbed methane reservoirs. Geophysical techniques were used to locate previously unrecognized structural features and zones of higher pressure indicating inadequately depleted portions of the reservoir. Petroleum engineering and simulation techniques verified and quantified reservoir parameters, such as faults, identified from seismic interpretation. The integration of geophysical, engineering, and geological data accelerated the study and increased the accuracy of the reservoir model leading to a better understanding of production controls at Cedar Hill.