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 D
Carbon Hill oil field (CH)
| Location: | Hocking County, Ohio (Ward Twp.) |
| Discovery date: | 1917 |
| Depth (ft): | 3,050 |
| Hydrocarbon type and GOR: | Oil and associated gas; GOR = 400 to 7,000, based on 2 wells |
| Structural setting: | Regional southeast dipping homocline with local anticlinal noses |
| Stratigraphic name of reservoir: | "Clinton" sands; best producing wells in sandstone reservoirs of distributary and tidal channel origin |
| Trap: | Stratigraphic |
| Porosity: | F ave = 10.3%, range 1 to 15% |
| Permeability: | Kave = 3.9 mD, range 1 to 10 mD |
| Natural fractures: | Oriented core indicates a well-developed natural fracture system oriented N55° E to N75° E |
| Diagenetic features: | Local secondary silica cementation; dominant cement is calcite, clay may have prevented excessive silica cementation |
| Water saturation and volume/salinity of produced water: | Sw (ave, core, producing interval) = 36.4%, Sw (ave, log, producing interval) = 33%, Sw (ave, core, total interval) = 62.1%, range 20 to 100%; salinity = 200,000 to 300,000 ppm |
| Gas/water and oil/water contacts: | |
| Reservoir pressure: | |
| Bottom-hole temperature: | |
| Well spacing: | 20 acres per oil well; 80 acres per gas well |
| Ultimate production (EUR per well): | |
| References: | Overbey and Henniger (1971); Whieldon (1966) |
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