General Setting
Information Search and Selection

Com ments

on

Geo logic

Para meters

1 Depth:

2 Permeability/Hydraulic Conductivity:

3 Formation Thickness:
4 Net Sand Thickness:
5 Percent Shale:
6 Continuity:
7 Top Seal Thickness:
8 Continuity of top seal:
9 Hydrocarbon Production:
10 Fluid Residence Time:
11 Flow Direction Elevation:

12

CO2 Solu bility Brine

 12a Temperature:
12b Pressure:
12c Salinity:
13 Rock/Water Reaction:
14 Porosity:
15 Water Chemistry:
16 Rock Mineralogy:

Oriskany Formation, Appalachian Basin
(Western Pennsyslvania, Eastern Ohio, and Eastern Kentucky)

Comments on Geologic Parameters

12b Formation Pressure:

Harper and Patchen (1996, their fig. Dos-11) presented a graph showing original reservoir pressures versus drilling depth for 68 Oriskany fields and pools in New York, Pennsylvania, and West Virginia. Although there is some scatter, their data indicate that pressures follow the hydrostatic gradient of 0.44 psi/ft. To derive a pressure-distribution map for the GIS, we multiplied the formation depth by the pressure gradient (0.44 psi/ft) (c12boriskanyg).

12b Map:

12b Reference:

Harper, J. A., and Patchen, D. G., 1996, Play Dos: the Lower Devonian Oriskany Sandstone structural play, in Roen, J. B., and Walker, B. J., eds., The atlas of major Appalachian gas plays: West Virginia Geological and Economic Survey Publication V-25, p. 109–117.