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 W
Senecaville gas field (S)
| Location: | Guernsey County, Ohio (Richland Twp.) |
| Discovery date: | 1969; 1971 ("Clinton" part) |
| Depth (ft): | 5,600 |
| Hydrocarbon type and GOR: | Gas and local associated oil (38 to 42° API gravity); GOR = 125,000 |
| Structural setting: | Regional southeast-dipping homocline |
| Stratigraphic name of reservoir: | "Clinton" sands; reservoirs are fluvial-dominated deltaic sandstone |
| Trap: | Stratigraphic; possible updip pinchout of sandstone reservoirs |
| Porosity: | F ave = 8%, range 2 to 16% |
| Permeability: | Kave = 0.5 mD, range 0.01 to 5 mD; K = 0.011 mD also reported |
| Natural fractures: | |
| Diagenetic features: | |
| Water saturation and volume/salinity of produced water: | Sw (ave) = 20%, range 10 to 60%; water production is low, range 0 to 2,000 BW/year or 0 BW/MMCFG to 12 BW/MMCFG |
| Gas/water and oil/water contacts: | |
| Reservoir pressure: | 1,200 psi (0.21 psi/ft) |
| Bottom-hole temperature: | |
| Well spacing: | 40 acres |
| Ultimate production (EUR per well): | 50th percentile (F50) =
180 MMCF of gas and 2,000 BO Typical well: EUR(15 years) = 245 MMCF of gas also reported Best well (Consolidated Resources America No. 1 Dziedzic, Ohio, permit no. 2647, drilled in 1980): produced 153 MMCF of gas in the first year (1980); produced 104,637 MCF of gas, 0 BO, and 2,735 BW from 1984 through 1995; production unknown in 1981 through 1983 Ultimate production for field = 4.2 BCF of gas and 46,000 BO |
| References: | Kell (1980), Keltch and others (1990) |
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