Petroleum geology of Cote d`Ivoir (Abidjan margin)
- Beicip-Franlab, Rueil-Malmaison (France)
The Cote d`Ivoire sedimentary basin is part of a typical transform passive margin developed along the West African coast from Liberia to Ghana. It straddles the coastline and the sedimentary section expands dramatically South of the East-West trending Lagune Fault, with up to 10,000 metres of sediments from Aptian to Present in age. Albo-Aptian rift series, mainly continental clastics without evaporites, have accumulated progressively in a tilted semi-graben. The drift stage marks a widespread marine sedimentation organized in progradational sequences which blanket the Albian block-fault topography of the continental break-up. Reservoirs are mainly clastics and present in the section from Middle Albian to Maastrichtian. Sand bodies are associated with identified submarine fans, infill structures or channelized units deposited in a shelf or outer-shelf environment. Trapping opportunities are due to block-faulting in the rift section, or gravity tectonics in the drift section, often combined with sand pinch-outs to constitute mixed structural-stratigraphic traps. Thick top-seal units formed by marine shales are widespread. Source-rocks have been shown to belong mainly to the rift series and they have been characterized in terms of geochemistry and maturation timing. An efficient simulation model has been used to recontruct the expulsion, migration and trapping of hydrocarbons along a selected North-South cross-section and to better define the Petroleum Systems.
- OSTI ID:
- 127689
- Report Number(s):
- CONF-950995-; ISSN 0149-1423; TRN: 95:005942-0246
- Journal Information:
- AAPG Bulletin, Vol. 79, Issue 8; Conference: International conference and exhibition of the American Association of Petroleum Geologists, Inc.: managing change at the turn of the century, Nice (France), 10-13 Sep 1995; Other Information: PBD: Aug 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
A petroliferous transform-margin basin, Cote d'Ivoire, West Africa
Structural framework, stratigraphy, and evolution of Brazilian marginal basins