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 G
Conneaut gas field (Indian Springs pool) [Cn(IS)]
| Location: | Crawford County, Pennsylvania (Conneaut and Harmonsburg 7½ min. quads.) |
| Discovery date: | 1957 |
| Depth (ft): | 3,700 to 4,190 |
| Hydrocarbon type and GOR: | Gas and associated oil (as much as 30 BOPD) |
| Structural setting: | Regional southeast-dipping homocline with numerous terraces and southest-plunging anticlinal noses |
| Stratigraphic name of reservoir: | Medina Group (Grimsby Formation and Whirlpool Sandstone) |
| Trap: | Stratigraphic; no recognizable updip pinchout of sandstone reservoirs |
| Porosity: | F ave (log) = 10%, as high as 18%; F medina ave (core) = 4%, range 2.9 to 5.4% |
| Permeability: | Kave = <0.1 mD; K = 0.082 mD also reported |
| Natural fractures: | |
| Diagenetic features: | |
| Water saturation and volume/salinity of produced water: | Salinity = 152,000 mg/l |
| Gas/water and oil/water contacts: | |
| Reservoir pressure: | Pave = 1,020 psi (0.26 psi/ft), range 800 to 1,150 psi |
| Bottom-hole temperature: | 98° F |
| Well spacing: | |
| Ultimate production (EUR per well): | |
| References: | Dresel (1985); Keighin and Hettinger (1997); Laughrey (1984); Pees and Burgchardt (1985); Pennsylvania Oil and Gas Association—Gas Advocacy Committee (1980) |
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