This report focuses on the characterization of reservoirs from wells in block CI-M of the Ivorian offshore sedimentary basin. The aim of this study is to identify and evaluate potential reservoirs by characterizing the petrophysical parameters of the formations. The study was based on the interpretation of gamma ray, resistivity, sonic, density and neutron logs, as well as the evaluation of the petrophysical parameters of the different reservoir formations crossed by the wells M-1X and M-2X. The results showed that the different well strata are predominantly composed of clays, but in some wells, there are intercalations of sandstone, limestone, sand, and siltstone beds at the Turonian and Cenomanian levels. Furthermore, the development of the lithostratigraphic column and the petrophysical parameters allowed us to identify reservoirs levels. Additionally, the study of wells M-1X and M-2X indicates that the reservoir layers are located in the Campanian, Turonian, and Cenomanian stages. The establishment of the lithostratigraphic column, the interpretation of the well logs, and the determination of the petrophysical parameters of the wells have highlighted three oil-bearing reservoirs and two water reservoirs.
References
[1]
Aka, K. (1991) Quaternary Sedimentation on the Margin of Côte d’Ivoire: Modeling Test. Thesis Doctorate State in Natural Sciences, University of Abidjan.
[2]
Sombo, B.C. (2002) Study of the Structural and Seismo-Stratigraphic Evolution of the Offshore Sedimentary Basin of Côte d’Ivoire, Passive Margin Cut by a Canyon. State Doctorate Thesis in Earth Sciences, University of Abidjan (Côte d’Ivoire).
[3]
Digbehi, Z. (2012) Palynostratigraphy and Palaeoenvironmental Characterization and Evidence of Oligocene in the Terrestrial Sedimentary Basin, Bingerville Area, Southern Côte d’Ivoire, Northern Gulf of Guinea. African Journal of Environmental Science and Technology, 6, 28-42. https://doi.org/10.5897/ajest11.265
[4]
Assale, F.Y.P. (2013) Sedimentological, Palynological, Geochemical and Paleoenvironmental Characterization of Sedimentary Formations Related to the Fault of the Lagoons (the Onshore Basin of Côte d’Ivoire). Doctoral Thesis, Félix Houphouët Boigny, University of Cocody, Abidjan, Côte d’Ivoire.
Timur, A. (1969) Pulsed Nuclear Magnetic Resonance Studies of Porosity, Movable Fluid, and Permeability of Sandstones. Journal of Petroleum Technology, 21, 775-786. https://doi.org/10.2118/2045-pa
[7]
Schlumberger, S. (1993) Interpretation of Seismic Data in Exploration. Geophysics Journal, 58, 1234-1247.
[8]
Koffi, C.L. (2014) Petrophysical Characterization of Cenomanian Reservoir Sandstones of the Abidjan Margin (Offshore Sedimentary Basin of Ivory Coast). Master’s Thesis, Félix Houphouët Boigny University of Cocody, Abidjan, Côte d’Ivoire.
[9]
Akobé, A.C. (2010) Characterization of Sandstones of Côte d’Ivoire and Ghana (Gulf of Guinea): Depositional Environment, Maturity and Energy Potential (Hydrocarbon Reservoirs). PHD Thesis, Cocody University, Côte d’Ivoire.
[10]
Obasi, A.I. and Selemo, A.O.I. (2018) Density and Reservoir Properties of Cretaceous Rocks in Southern Benue Trough, Nigeria: Implications for Hydrocarbon Exploration. Arabian Journal of Geosciences, 11, Article 307.
[11]
Dake, L. (2001) Preface. In: Developments in Petroleum Science, Elsevier, 9-12. https://doi.org/10.1016/s0376-7361(08)70382-0