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:

Fox Hills — Lower Hell Creek, Powder River Basin

Comments on Geologic Parameters

15 Water Chemistry:
Fox Hills brine chemistry data, summarized by Henderson (1985), show that dissolved-solid concentrations increase downflow from initially low values in the northern recharge area. A plume of intermediate dissolved solids content is controlled by mixing of recharge waters with older, northwest-trending waters. Deep-basin Fox Hills waters are predominantly sodium bicarbonate, sulfate, and chloride.

15 Map:

15 Table: click here

15 Reference:
Henderson, T., 1985, Geochemistry of ground-water in two sandstone aquifer systems in the northern Great Plains in parts of Montana and Wyoming: U. S. Geological Survey, Professional Paper 1402-C, p. C1-C84.