CO2 Brine Database

General Information
Geologic Parameters
1 Depth to Top:
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 Solubility Brine	12a Temperature:
	12b Pressure:
	12c Salinity:
13 Rock/Water Reaction:
14 Rock Porosity:
15 Water Chemistry:
16 Rock Mineralogy:

Lower Potomac Group, Eastern Coastal Plain of Maryland, Delaware, and New Jersey

Comments on Geologic Parameters

12b Formation Pressure:

Hansen (1984) and Trapp and others (1984) provided discussions of pressure gradients for the lower Potomac Group (Waste Gate Formation) of eastern Maryland. They found that observed pressures generally follow a normal lithostatic pressure gradient of 0.45 psi/ft. To derive a pressure distribution map for the GIS, we took the 0.45 psi/ft and multiplied the depth to the top of the lower Potomac aquifer (c12bpotomac).

12b Map:

map

12b Reference:

Hansen, H. J., 1984, Hydrogeologic characteristics of the Waste Gate Formation, a new subsurface unit of the Potomac Group underlying the eastern Delmarva Peninsula: Maryland Geological Survey Information Circular 39, 22 p.

Trapp, H., Jr., and Meisler, H., 1992, The regional aquifer underlying the northern Atlantic coastal plain in parts of North Carolina, Virginia, Maryland, Delaware, New Jersey, and New York-summary: U.S. Geological Survey, Professional Paper 1404A, 33 p., 11 plates.