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:

Madison Group, Williston Basin

Comments on Geologic Parameters

9 Hydrocarbon Production:

Exploration in the Williston Basin started with the discovery of gas in the Upper Cretaceous Eagle Sandstone on the Cedar Creek Anticline in southeastern Montana in the earliest 1900's. Hydrocarbons have been produced from reservoirs of Cambrian, Ordovician (Red River), Silurian, Devonian (Pre-Bakken–Post-Prairie Salt, Pre-Prairie Middle Devonian and Silurian, Mississipian (Madison), Pennsylvanian, and Triassic ages. Unconventional continuous-type plays are also important in the Williston Basin.

9 Map:

9 Reference:

Geological Atlas of the Rocky Mountain Region. Rocky Mountain Association of Geologists. Denver Colorado 1972.