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:

Tuscaloosa Group, Alabama Gulf Coastal Plain

Comments on Geologic Parameters

12a Formation Temperature:

Formation temperature. In their summary report of geothermal data for southwest Alabama, Wilson and Tew (1985) inferred that geothermal gradients for the Gulf Coastal Plain strata are low to moderate. We used figure 10 of Wilson and Tew (1985) to determine a geothermal gradient of 1.3 °F/100 ft for the Tuscaloosa Formation in the Mobile area. To derive temperatures we combined the temperature gradient with the depth to the middle Tuscaloosa Group mapping horizon by Moffet and others (1984a).

12a Map:

12a Reference:

Moffett, T. B., Hinkle, F., Epsman, M. L., and Wilson, G. V., 1984a, Configuration of the top of the Selma Group in Alabama: Alabama Geological Survey, Map 199CB, 1 sheet.

Wilson, G. V., and Tew, B. H., 1985, Geothermal data for southwest Alabama: correlations to geology and potential uses: Alabama Geological Survey, Oil and Gas Report 10, 156 p.