3D seismic interpretation and prospect identification of the dembe field offshore, Niger delta, Nigeria

  • Authors

    • Nnaemeka C. C Nnamdi Azikiwe University, Awka
    • Anakwuba E. K Nnamdi Azikiwe University, Awka
    • Onwuagba F. C Nnamdi Azikiwe University, Awka
    • Nechi V. O Nnamdi Azikiwe University, Awka
    • Igwebudu C. N Nnamdi Azikiwe University, Awka
    • Ezenwa E. E Nnamdi Azikiwe University, Awka
    • Orabueze V. C Nnamdi Azikiwe University, Awka
    • Nebechukwu F. O. Nnamdi Azikiwe University, Awka
    • Okafor A. C Nnamdi Azikiwe University, Awka
    2022-02-02
    https://doi.org/10.14419/ijag.v10i1.31884
  • 3d Seismic, Lead, Normal Fault, Niger Delta, Prospect.

  • 3D seismic interpretation and prospect evaluation has been carried out in a hydrocarbon bearing field, standard method of seismic interpretation which includes fault interpretation, well-seismic tie, and horizon mapping were carried out with the aid of seismic attributes such as variance edge and root mean square attributes. Well-seismic-tie established a reasonable tie and indicated that the identified reservoirs were of low impedance as the top of this reservoirs coincided with the troughs. TWT vs Depth plot showed a linear trend which aided in creating a velocity model for the time-depth conversion. Fault mapping revealed that the area was divided into 8 blocks by regionally extensive faults associated with several minor faults which are normal and listric in geometry. Petrophysical analysis showed that the reservoirs has an average porosity of 0.24, water saturation of 0.35, and net-to-gross of 0.78 which are favourable reservoir conditions. A lead Dembe-3, and 2 prospects Dembe-1 and Dembe-2 were identified. Volumetric estimation shows that the prospects boasts of a combined petroleum reserve of about 134 MMSTB of recoverable oil and about 167 BCF of recoverable gas. The results from this study show that, away from currently producing zones of the Dembe field, additional lead and prospects exist which could be further explored to optimize hydrocarbon production in the field.

     

     

  • References

    1. [1] Burke, K., Dessauvagie, T.F.G. and Whiteman, A.J. (1972). Geological history of the Benue valley and adjacent areas. In Dessauvagie, T.F.G. and Whiteman, A.J., (Eds.), African Geology, Ibadan University Press, Ibadan, p. 187- 205.

      [2] Chukwueke, C. C. (1997). Factors Controlling Hydrocarbon Distribution in the Central Swamp Depobelt of the Niger Delta. Nigerian Association of Petroleum Explorationists Bulletin Memoir 48, pp 201-328.

      [3] Doust, H., and Omatsola, E., (1990). Niger Delta, in, Edwards, J.D., and Sangogrossi, P.A., eds., Divergent/passive Margin Basins, AAPG Memoir 48: Tulsa, American Association of Petroleum Geologists, pp. 239-248. https://doi.org/10.1306/M48508C4.

      [4] Evamy, B.D., Haremboure, J., Kamerling, P., Knaap, W.A., Molloy, F.A. and Rowlands, P.H. (1978). Hydrocarbon habitat of Tertiary Niger Delta. AAPG Bulletin, vol. 62, pp. 1-39. https://doi.org/10.1306/C1EA47ED-16C9-11D7-8645000102C1865D.

      [5] Hospers, J., (1965). Gravity Field and Structure of the Niger Delta, Nigeria, West Africa. Geological Society of America Bulletin 76 (4), 407-422. https://doi.org/10.1130/0016-7606(1965)76[407:GFASOT]2.0.CO;2.

      [6] Kaplan, A., Lusser C., Norton I., (1994). Tectonic Map of the World. American Association of Petroleum Geologists, 60, 230-237.

      [7] Klett, T, R., Ahlbrandt, T. S., Schmoker, J. W., and Dolton, J. L., (1997). Ranking of the World’s Oil and Gas Provinces by Known Petroleum Volumes. U.S. Geological Survey Open-file Report-97-463, CD-ROM. pp. 56-58. https://doi.org/10.3133/ofr97463.

      [8] Knox, G., Omatsola M. E., (1989). Development of the Cenozoic Niger Delta in Terms of the Escalator Regression Model. Proceedings, Coastal Lowlands and Geomorphology, Kon. Neederl. Geol. Mijnb. Genootschap, pp181-202. https://doi.org/10.1007/978-94-017-1064-0_12.

      [9] Kulke, H., (1995). Nigeria, in Kulke, H., ed, Regional Petroleum Geology of the World. Part II: Africa, America, Australia and Antarctica: Berlin, Gebruder Borntraeger, pp143-172.

      [10] Lawrence S. R., Munday S., Bray R. (2002). Regional Geology and Geophysics of the Eastern Gulf of Guinea (Niger Delta to Rio Muni). The Leading Edge 21(11), 1112-1117. https://doi.org/10.1190/1.1523752.

      [11] Nwachukwu, J. I. and Chukwurah, P. I. (1986). Organic matter of Agbada Formation, Niger Delta, Nigeria: American Association of Petroleum Geologists Bulletin, Volume 70, pp 48-55. https://doi.org/10.1306/94885624-1704-11D7-8645000102C1865D.

      [12] Nwajide, C.S., (2013). Geology of Nigeria’s Sedimentary Basins. CSS Bookshop Limited, Lagos. 556pp.

      [13] Oluwatoyin, O., Olatunji, O.A., and Bankole S. A., (2013). 3D seismic structural interpretation of part of ALOO-field, southwestern Niger Delta, Nigeria: IOSR Journal of Applied Geology and Geophysics, vol. 1, pp. 29-35. https://doi.org/10.9790/0990-0112935.

      [14] Opara, A.I., Anyiam, U.O., Nduka, V., (2011). 3D seismic interpretation and structural analysis of Ossu oil field, Northern depobelt, Onshore Niger Delta, Nigeria: Pacific Journal of Science and Technology, vol. 12, no. 1, pp. 502-509. https://doi.org/10.1190/1.3513087.

      [15] Short, K.C. and Stauble, A. J., (1967), Outline of Geology of the Niger Delta. AAPG Bull., vol. 51 pp. 761-779. https://doi.org/10.1306/5D25C0CF-16C1-11D7-8645000102C1865D.

      [16] Whiteman A.J., (1982). Nigeria: Its Petroleum Geology, Resources and Potential. Graham and Trotman, London. 394p. https://doi.org/10.1007/978-94-009-7361-9.

      [17] Wright, J.B., Hastings, D.A., Jones, W.B., and Williams, H.R., (1985). Geology and Mineral Resources of West Africa. George Allen and Unwin, London, 187p.

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  • How to Cite

    C. C, N., E. K, A., F. C, O., V. O, N., C. N, I., E. E, E., V. C, O., F. O., N., & A. C, O. (2022). 3D seismic interpretation and prospect identification of the dembe field offshore, Niger delta, Nigeria. International Journal of Advanced Geosciences, 10(1), 1-11. https://doi.org/10.14419/ijag.v10i1.31884