Petroleum geology of Benue trough and southeastern Chad basin, Nigeria

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6894233

Petters, S W; Ekweozor, C M

Cretaceous cyclic sedimentation in the southern Benue trough, together with unconformities, provide a tripartite subdivision of the sedimentary succession into (1) the Albian Asu River Group, (2) the late Cenomanian to early Santonian Cross River Group (new name) and interfingering marginal marine sandstones, and (3) the post-Santonian coal measures sequence. Most of the Albian to Eocene marine shales in the Benue trough and the Turonian shales in the southern Chad basin contain well over 0.5% total organic carbon, with values of up to 7.4% in Turonian anaerobic shales. Based on the high content of soluble organic matter, thermal maturity, and the predominantly terrigenous character of the Late Cretaceous shales, mostly natural gas was probably generated in both basins. The late Santonian folding and uplift would have disrupted petroleum reservoirs. Also, crude oil accumulations which were not dissipated by tectonism would be relocated at relatively shallow depths and hence become accessible to invading meteoric waters.

• Research Organization: Univ. of Ibadan, Nigeria
• OSTI ID: 6894233
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 66:8; ISSN AAPGB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
AFRICA
CARBONACEOUS MATERIALS
COAL
CRETACEOUS PERIOD
DEVELOPING COUNTRIES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
MATERIALS
MATURATION
MESOZOIC ERA
MINERAL RESOURCES
NIGERIA
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
RESERVOIR ROCK
RESOURCES
ROCKS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SEDIMENTATION
SHALES
SOURCE ROCKS
TECTONICS