Subsurface structure and hydrocarbon occurrence, Heidelberg-Sand Hill graben system, southeast Mississippi

Conference · Mon Sep 01 04:00:00 EDT 1986 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6987964

Bowman, J K; Meylan, M A

The subsurface structure and hydrocarbon distribution of the Heidelberg-Sand Hill graben system have been determined using 575 electric logs, existing field studies, and proprietary seismic data. This graben system, located on the eastern side of the Mississippi Salt basin, extends for about 55 mi north-northwest-south-southeast from Jasper County to Greene County, Mississippi. Heidelberg, Sandersville, Choctaw, Pool Creek, North Wausau, Wausau, Thompson Creek, South Thompson Creek, Flat Branch, North Sand Hill, and Avera oil fields are situated along the graben (from north to south). Cumulative oil production is about 170 million bbl, with about 83% from Heidelberg field. Eutaw and Tuscaloosa sandstones are the chief reservoirs. Structure contour maps and structure cross sections perpendicular to the trend of the graben have been used to define the character of the system. The graben is superimposed on a Louann Salt ridge and associated piercement domes. The location of the salt ridge may be controlled by faulting of the pre-Louann basement (Phillips fault system). Most hydrocarbons are found in upthrown fault closure along either the eastern or western bounding faults. Downthrown Selma chalk, Mooringsport shales, or other impermeable units provide the seal. Minor amounts of oil occur within the graben, either in fault closure or faulted anticlinal closure formed by salt uplift or simultaneous rollover into the principal bounding faults.

• OSTI ID: 6987964
• Report Number(s): CONF-8610199-
• Conference Information: Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 70:9
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ANTICLINES
FEDERAL REGION IV
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOLOGIC TRAPS
MINERAL RESOURCES
MISSISSIPPI
NATURAL GAS DEPOSITS
NORTH AMERICA
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
SALT DEPOSITS
SEDIMENTARY BASINS
SOURCE ROCKS
USA