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Reservoir Model of the Jacksonburg-Stringtown Oil Field; Northwestern West Virginia: Potential for Miscible CO2 Enhanced Oil Recovery

Blake D. Bergerud
West Virginia University

Located in northwestern West Virginia, the Jacksonburg-Stringotwn field has been a prominent hydrocarbon producer since its discovery in 1895. One of the primary producing intervals within the field is the Late Devonian Gordon Stray sandstone. This fluvial-deltaic formation was deposited within the Catskill delta complex in response to a rapid transgressive sea level change. Formation structural and isopach maps generated with data from 73 local wells show a northeast-southwest trending sand deposit of 15-35 foot thickness. This was interpreted as the depocenter for the incised valley in which the Gordon Stray was deposited. Examination of log signatures displays a high degree of association with estuarine depositional patterns. RHOmaa/Umaa lithology ternary plots from identifiable subunits within the Gordon Stray formation additionally support the conclusion of a marine-influenced estuarine depositional framework. Porosity and pore-feet distribution maps were produced to better predict areas of variable reservoir quality. Finally, a miscible CO2 flood model was prepared to estimate the enhanced oil recovery potential for the field. Analysis of formation structure maps reveal that the reservoir is synclinal and, as a result, contains a stratigraphic trap as opposed to the more common structural traps found in the immediate area. It was concluded that the Jacksonburg-Stringtown field is wellsuited for enhanced oil recovery and/or geologic CO2 sequestration.

AAPG Search and Discovery Article #90182©2013 AAPG/SEG Student Expo, Houston, Texas, September 16-17, 2013