TITLE:
Chemostratigraphic Characterization Tests on Sedimentary Formations in the Côte D’Ivoire Offshore Basin: Case of A-X and B-X Wells
AUTHORS:
Kokoa Chia Marie Reine, Kra Akoua Clarisse, Irié Bi Trazié Gaël, Coulibaly Sougo Aoua, Affian Kouadio
KEYWORDS:
Chemostratigraphy, Characterization, Sediments, Offshore Basin, Albian-Paleocene, Ivory Coast
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.13 No.10,
October
30,
2023
ABSTRACT: The tests performed with two
hundred and thirty-nine (239) samples from the A-X and B-X drillings help to
know their sedimentological and chemostratigraphic characters. In
sedimentological term formations are composed of sand, sandstone, limestone,
siltstone and argillite that alternate along the drill. In chemostratigraphic
term two megasequences (MS1 and MS2) have been identified. A correlation of
chemostratigraphic data completed by the lithology results allowed a
subdivision of oil wells that shows two main types of deposits environments.
First, a proximal marine environment to continental and to Albian marked by a
detrital flow deducted from the concentrations evolution of indicator elements
of terrigenous material that are K, Mg, and Rb. On the other hand, a deep to
shallow marine environment of Cenomanian to Paleocene marked by the presence of
predominantly clay sediments and abundant glauconite in the lower Senonian.
Nevertheless, there is a transition or intermediate environment that is
characterized by the presence of glauconite and detrital flows.