Geochemical Characterization of Potential Source Rock of the Central (Saltpond) Basin, Ghana
International Journal of Oil, Gas and Coal Engineering
Volume 2, Issue 2, March 2014, Pages: 19-27
Received: May 5, 2014;
Accepted: May 15, 2014;
Published: May 30, 2014
Views 3428 Downloads 433
S. Bansah, Department of Geological Sciences, University of Manitoba, 240 Wallace Building, Winnipeg, Canada, MB R3T 2N2; Geological Engineering Department, KNUST, Kumasi-Ghana, 03220
E. K. Nyantakyi, School of Earth Sciences, Yangtze University, Caidian Wuhan, 430100, Hubei, China; Civil Engineering Department, Kumasi Polytechnic, P.O. Box 854, Kumasi-Ghana, 03220
L. A. Awuni, Geological Engineering Department, KNUST, Kumasi-Ghana, 03220; Ghana National Petroleum Cooperation, PMB, Petroleum House, Tema
J. K. Borkloe, School of Earth Sciences, Yangtze University, Caidian Wuhan, 430100, Hubei, China
Gong Qin, School of Earth Sciences, Yangtze University, Caidian Wuhan, 430100, Hubei, China
This research characterized the potential source rock of 3 exploratory wells from the Central (Saltpond) Basin, Ghana. Ten (10) samples each of the drilled cuttings from the three key exploratory wells were geochemically characterized for total organic carbon contents (TOC), rock-eval pyrolysis techniques and vitrinite reflectance measurements (Ro). The results revealed that they have fair to good total organic carbon (TOC) contents, suggesting that there might exist conditions in the Saltpond Basin that favour organic matter production and preservation. The rock-eval results showed that all the samples from the 3 exploratory wells contain predominantly types II and III kerogen with a capacity to generate gas-oil and gas respectively. They have good generation potential. Results of the vitrinite reflectance measurement also reveal that all the samples from the 3 exploratory wells have poor to low source-rock grade. The Saltpond Basin can be regarded as having fair petroleum source rocks and could be part of a petroleum system if sufficient burial and maturation have occurred.
E. K. Nyantakyi,
L. A. Awuni,
J. K. Borkloe,
Geochemical Characterization of Potential Source Rock of the Central (Saltpond) Basin, Ghana, International Journal of Oil, Gas and Coal Engineering.
Vol. 2, No. 2,
2014, pp. 19-27.
IHS (2010) IHS Energy Group, 2003 [includes data current as of Decem¬ber 2003], International petroleum exploration and produc¬tion database: IHS Energy Group; database available from IHS Energy Group, 15 Inverness Way East, Englewood, CO 80112 U.S.A.
Asiedu, D.K., E. Hegner, A. Rocholl, and D. Atta-Peters, (2005) Provenance of late Ordovician to early Creta-ceous sedimentary rocks from Southern Ghana as inferred from Nd isotopes and trace elements: J. African Earth Sci., v. 41, p. 318-319.
Clifford, A.C. (1986) African oil—Past, present, and future, in Halbouty, M.T., ed., Future petroleum provinces of the world, Proceedings of the Wallace E. Pratt Memorial Con¬ference, Phoenix, December 1984: American Association of Petroleum Geologists Memoir 40,
Kjemperud, A., Agbesinyale, W., Agdestein, T., Gustafsson, C., and Yükler, A. (1992) Tectono-stratigraphic history of the Keta Basin, Ghana with emphasis on late erosional epi¬sodes, in R. Cumelle, (ed.), Geologie Africaine -1st Coloque de stratigraphie et de paleogeographie des basins sedimentaires ou est-Africans, 2nd Colloque Africain de Micropaleontologie, Libreville, Gabon, May 6 – 8, 1991: Elf Aquitaine Memoir 13, p. 55-69.
Seewald, J. S. (2003) Organic-inorganic interaction in petroleum-producing sedimentary basins. Nature 426, 327–333.
Ghana National Petroleum Corporation (2007) Hydrocarbon potential report of the Central (Saltpond) Sedimentary Basin, vol. 2, Saltpond Project Unit, Te-ma-Greater-Accra. Web accessed November 11, 2013. http://www.gnpcghana.com
Acres International Limited, unpublished report
Taylor, G. H., Teichmüller, M., Davis, A. (1998) Organic petrology: Berlin, Borntraeger, 704 pp.
Ghoria, K. A. R. (1998) Petroleum Source-Rock Potential and Thermal Maturity of the Officer Basin [J]. Geological Survey of Western Australia. 1, pp. 52-53.
Walters, C. C. (2006) The Origin of Petroleum, in Practical Advances in Petroleum Processing, Volume 1, Springer Science and Business Media Inc, New York, pp. 79-97
Hunt, J. M. (1996) Petroleum Geochemistry and Geology, W. H. Freeman, San Francisco, 743pp.
Tissot, B.P. and Welte D. H. (1984) Petroleum Formation and Occurrence [M]. Springer Verlag, New York, ISBN 9783642878152, 702pp.
Barker, C. (1996) Thermal Modelling of Petroleum Generation: Theory and Applications [M] Elsevier, New York, 1996, 512pp.
Peters, K. E. (1986) Guidelines for evaluating petroleum source rock using programmed analysis [J] The American Association of Petroleum Geologists Bulletin. 70, pp. 318-329.
Dow, W. G. (1977) Kerogen studies and geological interpretations: Journal of Geochemical Exploration, v. 7, p. 77– 99, doi:10.1016/0375-6742(77)90077-2.
Waples, D. W., H. Kamata, and M. Suizu. (1992) The art of maturity modeling: Part 1. Finding a satisfactory geological model: AAPG Bulletin, v. 76, p. 31–46.