ABSTRACT: Parameters Controlling Hydrocarbon Distribution at Tatums Camp Field, Lamar County, Mississippi

Phillip Jackson

Structural setting, stratigraphy, diagenesis, and hydraulic pathways all have played an important role in the development of reservoir at Tatums Camp field in Lamar County, Mississippi. The field is a domal anticline located on the southern flank of Midway Salt Dome within the confines of the Mississippi Salt basin. Production is from the Booth Sandstone of the Lower Cretaceous Hosston Formation.

The Booth Sandstone contains productive mouth bar sands that pinch out across the northeast half of the dome, and nonproductive channel sands on the west. The mouth bars appear to have been deposited in a marginal marine, perhaps, estuarine environment.

Porosity is secondary in origin, the result of leaching of framework constituents. Diagenetic studies indicate that hydrocarbons migrated into the sands when they were at or close to their present depth of 15,700-15,800 ft (4785-4815 m).

Hydraulic head estimates within the upper Hosston Formation decrease from north to south. This pattern suggests that fluid movement is to the south away from Midway Salt Dome. It is probable that these hydraulic pathways were established at the time of hydrocarbon migration.

The reservoir at Tatums Camp field appears to be the result of hydrocarbon migration from the north into a stratigraphic pinchout lying across a structurally positive feature.

AAPG Search and Discovery Article #90999©1990 GCAGS and Gulf Coast Section SEPM Meeting, Lafayette, Louisiana, October 17-19, 1990