TITLE:
Hydrocarbon Potential of Two Coastal Basins (Cameroon)
AUTHORS:
Jean Jacques Nguimbous-Kouoh, Jacques Tchutchoua, Simon Ngos III, Theophile Ndougsa Mbarga, Eliezer Manguelle-Dicoum
KEYWORDS:
Sedimentary Basin, Geological Structure, Source Rock, Reservoir Rock, Oil Accumulation
JOURNAL NAME:
International Journal of Geosciences,
Vol.9 No.2,
February
28,
2018
ABSTRACT: The problem related to the occurrence of oil accumulations in a sedimentary
basin requires knowledge of the different geological structures present in this
basin. The aim of this article is to show that the geological structure of sedimentary
basins has an impact on the generation of oil accumulations. The
case of Cameroon’s coastal basins has been studied: the Douala/Kribi-Campo
basin (DKC) and the Rio Del Rey basin (RDR), which are producing basins in
Cameroon. The work carried out has enabled to classify the DKC and RDR
basins as passive margin basins. The lithology and geological structures
present in the Douala/Kribi-Campo basin suggest the existence of source
rocks (RM-1, RM-2, RM-3, RM-4 and RM-5), seal rocks (Mundeck clay, Logbabaclay...),
stratigraphic, structural and mixed traps; the best oil potential is
identified in its eastern part. On the other hand, the sandy levels are abundant,
clean, and thick with a great porosity, which makes them excellent hydrocarbon
reservoirs. In the Rio Del Rey basin, the lithology and geological
structures present suggest the occurrence of source rocks (Akata clay and Agbada
base clay), seal rocks (Akata clay) and multilayered reservoir rocks sandy
or silty Agbada Formation and the freshwater sands of the Benin Formation.
Unlike the Douala/Kribi-Campo basin, the best oil potential in the Rio Del
Rey Basin lies in the center, in the so-called “deltaic alternation” formations
dated from the late Miocene to the Pliocene.