Integration of Well Logs and Seismic Attribute Analysis in Reservoir Identification on PGS Field Onshore Niger Delta, Nigeria

C. C. Okpoli 1  and D. I Arogunyo 1
  • 1 Department of Earth Sciences, Faculty of Science, Akungba-Akoko, Nigeria

Abstract

Integrated well dataset and seismics delineated the PGS field onshore Niger Delta for reservoir identification. Gamma ray, resistivity, Neutron and density Logs identified four lithologies: sandstone, shaly sandstone, shaly sand and shale. They consist of sand-shale intercalation with the traces of shale sometimes found within the sand Formation. Petrophysical parameters of the reservoirs showed varying degree of lower density, low gamma ray, high porosity and resistivity response with prolific hydrocarbon reservoir G due to its shale volume and the clean sand mapped as a probable hydrocarbon reservoir. 3D seismic data located both seismic scale and sub-seismic scale structural and stratigraphic elements. Risk reduction in dry hole drilling due fault missing in conventional seismic attribute analysis and interpretation, have to be integrated into the Oil companies standard practice.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] T.J.A. Reijers, S.W. Petters, and C.S. Nwajide, “The Niger Delta Basin”, in Selley, R.C., ed., African Basins--Sedimentary Basin of the World 3: Amsterdam”, Elsevier Science, pp. 151-172, 1997.

  • [2] Thomas., “Niger delta oil production, reserves, field sizes assessed”, Oil & Gas Journal, Pp. 101-103, 1995.

  • [3] L.S. Smith-Rouch, K.E. Meisling, P.E. Hennings, and J.M. Armentrout, “Tectono-stratigraphic computer experiments—Nigeria example”, American Association of Petroleum Geologists Bulletin Abstracts, 1996.

  • [4] R.C. Haack, P. Sundararaman, and J. Dahl, “Niger Delta petroleum System”, in, Extended Abstracts, AAPG/ABGP Hedberg Research Symposium”, Petroleum Systems of the South Atlantic Margin, November 16-19, Rio de Janeiro, Brazil, 1997.

  • [5] T.R. Klett, T.S. Ahlbrandt, J.W. Schmokerand, and J.L. Dolton, “Ranking of the world’s oil and gas provinces by known petroleum volumes”, U.S. Geological Survey Open-file Report-97, Pp. 463, 1997.

  • [6] K.C. Short, and A.J. Stäuble, “Outline of geology of Niger Delta”, American Association of Petroleum Geologists Bulletin, Vol. 51, Pp. 761-779, 1965.

  • [7] A.A. Avbovbo, “Tertiary lithostratigraphy of Niger Delta”, American Association of Petroleum Geologists Bulletin, Vol. 62, Pp. 295-300, 1978.

  • [8] H. Doust, and E. Omatsola, “Niger Delta”, in, Edwards, J. D., and Santogrossi, P.A., eds., Divergent/passive Margin Basins”, AAPG Memoir 48: Tulsa, American Association of Petroleum Geologists, Pp. 239-248, 1990.

  • [9] C.M. Ekweozor, and N.V. Okoye, “Petroleum source-bed evaluation of Tertiary Niger Delta”, American Association of Petroleum Geologists Bulletin, Vol. 64, Pp. 1251-1259, 1980.

  • [10] J.J. Nwachukwu, and P.I. Chukwurah, “Organic matter of Agbada Formation, Niger Delta, Nigeria”, American Association of Petroleum Geologists Bulletin, Vol. 70, Pp. 48-55, 1986.

  • [11] P.M. Shannon, and N. Naylor, “Petroleum Basin Studies London”, Graham and Trotman Limited, Pp. 153-169, 1989.

  • [12] B.D. Evamy, J. Haremboure, P. Kamerling, W.A. Knaap, F.A. Molloy, and P.H. Rowlands, “Hydrocarbon habitat of Tertiary Niger Delta”, American Association of Petroleum Geologists Bulletin, Vol. 62, Pp. 277-298, 1978.

  • [13] P. Stacher, “Present understanding of the Niger Delta hydrocarbon habitat.”, Oti, M.N., and Postma, G., eds., Geology of Deltas: Rotterdam, A.A. Balkema, Pp. 257-267, 1995.

  • [14] J.E. Ejedawe, S.J.L., Coker, D.O. Lambert-Aikhionbare, K.B. Alofe, F.O. Adoh, “Evolution of oil-generative window and oil and gas occurrence in Tertiary Niger Delta Basin”, American Association of Petroleum Geologists, 68, Pp. 1744-1751, 1984.

  • [15] F.T. Beka, and M.N. Oti, “The distal offshore Niger Delta: frontier prospects of a mature petroleum province”, Oti, M.N., and Postma, G., eds., Geology of Deltas: Rotterdam, A.A. Balkema, Pp. 237-241, 1995.

  • [16] J.M. Hunt, “Generation and migration of petroleum from abnormally pressured fluid compartments”, American Association of Petroleum Geologists Bulletin, Vol. 74, Pp. 1-12, 1990.

  • [17] L.B. Magoon, and W.G. Dow, “The petroleum System, in, Magoon, L.B., and Dow, W.G., eds., The Petroleum System--from Source to trap”, AAPG Memoir 60: Tulsa, American Association of Petroleum Geologists, Pp. 3-24, 1994.

  • [18] D.O. Lambert-Aikhionbare, and A.C. Ibe, “Petroleum source-bed evaluation of the Tertiary Niger Delta: discussion”, American Association of Petroleum Geologists Bulletin, Vol. 68, Pp. 387-394, 1984.

OPEN ACCESS

Journal + Issues

Search