Characteristics of discrete and basin-centered parts of the Lower Silurian regional oil and gas accumulation, Appalachian basin: Preliminary results from a data set of 25 oil and gas fields
U.S. Geological Survey Open-File Report 98-216
Appendix J
Cooperstown gas field (Oil Creek pool) [C(OC)]
Location: | Venango County, Pennsylvania (Oil City and Titusville South 7½ min quads.) |
Discovery date: | ~1984 |
Depth (ft): | 5,800 to 6,200 |
Hydrocarbon type and GOR: | Nonassociated gas |
Structural setting: | Regional southeast-dipping homocline with numerous southeast-plunging anticlinal noses; field is near the Tyrone-Mt. Union regional lineament |
Stratigraphic name of reservoir: | Medina Group; Grimsby Formation and Whirlpool Sandstone |
Trap: | Water block |
Porosity: | F ave (core) = 6 to 8.5%, range for Grimsby Formation <6 to 20%, range for Whirlpool Sandstone 4.5 to 13% |
Permeability: | K < 0.1 mD, based on Cooperstown field |
Natural fractures: | |
Diagenetic features: | |
Water saturation and volume/salinity of produced water: | |
Gas/water and oil/water contacts: | |
Reservoir pressure: | 1,400 to 1,500 psi (0.23 to 0.25 psi/ft) |
Bottom-hole temperature: | |
Well spacing: | |
Ultimate production (EUR per well): | EURmed = 225 MMCF of gas per well, range <100 to >500 MMCF of gas per well |
References: | Pees (1994); Zagorski (1991) |
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