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 E
Claysville oil field (Clv)
Location: | Guernsey County, Ohio (Spencer and Westland Twps.) |
Discovery date: | 1968 |
Depth (ft): | 4,800 to 5,100 |
Hydrocarbon type and GOR: | Oil and associated gas |
Structural setting: | Regional southeast-dipping homocline; adjoins the west side of the Cambridge arch |
Stratigraphic name of reservoir: | "Clinton" sands; reservoirs dominated by northeast-trending sandstone bodies of distributary channel and distributary mouth bar origin |
Trap: | Stratigraphic; no recognizable updip pinchout of sandstone reservoirs; the net thickness of the reservoir interval decreases slightly updip |
Porosity: | F ave(core) = 5%, range 0.1 to 9.2% |
Permeability: | Kave(core) = 3.5 mD, range <0.01 to 13.2 mD |
Natural fractures: | Noted in core |
Diagenetic features: | |
Water saturation and volume/salinity of produced water: | Sw (ave) = 31.2%, range 16.5 to 43.4%; salinityave = 212,000 ppm, range 147,000 to 256,000 |
Gas/water and oil/water contacts: | |
Reservoir pressure: | 1,200 psi (0.24 psi/ft); 1,559 to 1,906 psi (0.30 to 0.39 psi/ft) also reported |
Bottom-hole temperature: | |
Well spacing: | |
Ultimate production (EUR per well): | |
References: | Baranoski (1993), Keltch and others (1990); Root and Martin (1995); Sanders (1991), Thomas (1993); U.S. Bureau of Mines (1969) |
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