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 Y
Yorktown/Clay gas field (Y/Cy)
| Location: | Tuscarawas County, Ohio (Clay and Warwick Twps.) |
| Discovery date: | 1965 |
| Depth (ft): | ~5,000 |
| Hydrocarbon type and GOR: | Gas and associated oil |
| Structural setting: | East-southeast-dipping homocline; several southeast-plunging anticlinal noses; possible local anticlinal closure |
| Stratigraphic name of reservoir: | "Clinton" sands; red Clinton sand has the best porosity |
| Trap: | Stratigraphic; possible updip pinchout of sandstone reservoirs |
| Porosity: | F ave = 7 to 8%, as high as 10 to 12%; F ave = 8.4% also reported |
| Permeability: | K = 0.053 to 0.094 mD |
| Natural fractures: | |
| Diagenetic features: | |
| Water saturation and volume/salinity of produced water: | Total fluid saturation (oil + water) = 20 to 35%; Salinityave = 213,277 ppm, range 173,688 to 287,074 ppm, sample number = 3 |
| Gas/water and oil/water contacts: | |
| Reservoir pressure: | 1,450 psi (0.29 psi/ft); 1,718 to 1,796 psi (0.34 to 0.37 psi/ft) also reported |
| Bottom-hole temperature: | |
| Well spacing: | 40 acres |
| Ultimate production (EUR per well): | Two wells: EUR = 1,100 MMCF of gas; EUR = 800
MMCF of gas Early wells in Warwick Twp: EURave = 440 to 490 MMCF of gas |
| References: | Krueger (1971), Lytton (1970), Mullet (1982), Oil and Gas Journal (1965); Sanders (1991); Thomas (1993) |
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