1887

Abstract

Summary

The focus of this paper is a cluster of prospects (Prospect-N, Prospect-S and Prospect-W) in the offshore Niger Delta. Two commercial fields with multiple reservoirs and one dry well have been drilled in the study area. The amplitude anomalies were identified in each prospect but similar amplitude anomaly was also located where the dry well was drilled. The reservoir rock at the regional scale and the trap were identified as the major risks for these prospects. The main objectives of this study were to understand the regional reservoir presence and effectiveness, the nature of seismic amplitude anomalies and reduction of the trap risk.

The geological model was used to understand the regional reservoir presence and effectiveness. The 3D seismic interpretation and fault seal analysis helped reduce the uncertainty around the structure and the trap. The Extended Elastic Impedance was used to further dig into the relationship between lithology, fluid and amplitude anomalies. The integration of various geoscience disciplines and data types resulted in substantial reduction in overall prospect risk. The study concluded that Prospect-N has the lowest overall risk and presents a promising location for the next exploration well in the block.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201900726
2019-06-03
2020-03-28
Loading full text...

Full text loading...

References

  1. Allan, U.S.
    [1989] Model for Hydrocarbon Migration and Entrapment within Faulted Structures. American Association of Petroleum Geologists Bulletin, 73(7): 803–811.
  2. Dabeer, S., Ngala, U. and Offor, E.
    [2018] The influence of shale ridges on reservoir development and implications for exploration-A case study from onshore Niger Delta, Nigeria. The 17th HGS-PESGB Conference on Africa E&P (Abstract)
  3. Evamy, B.D., Haremboure, J., Kamerling, P., Knaap, W.A., Molloy, F.A. and Rowlands, P.H.
    [1978] Hydrocarbon habitat of Tertiary Niger Delta. American Association of Petroleum Geologists Bulletin, 62, 1–39.
  4. Frankl, E.J. & Cordry, E.A.
    [1967] The Niger delta oil province: recent developments onshore and offshore. World Petroleum Congress, Mexico City, 195–209.
  5. Knipe, R.J.
    [1997] Juxtaposition and seal diagrams to help analyze fault seals in hydrocarbon reservoirs. American Association of Petroleum Geologists Bulletin, 81(2): 187–195.
  6. Michele L.W.Tuttle, Ronald R.Charpentier and Michael E.Brownfield
    , [1999] The Niger Delta Petroleum System: Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africa. USGS Open-File Report99–50-H, 58.
    [Google Scholar]
  7. Short, K.C. and Stäuble, A. J.
    [1967] Outline of Geology of Niger Delta. American Association of Petroleum Geologists Bulletin, 51, 761–779.
    [Google Scholar]
  8. Whitcombe, D.N., Connolly, P. A., Reagan, R. L. and Redshaw, T. C.
    [2002] Extended elastic impedance for fluid and lithology prediction: GEOPHYSICS, Soc. of Expl. Geophys., 67, 63–67.
    [Google Scholar]
  9. Yielding, G., Freeman, B. and Needham, D.T.
    [1997] Quantitative fault seal prediction. American Association of Petroleum Geologists Bulletin, 81(6): 897–917.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900726
Loading
/content/papers/10.3997/2214-4609.201900726
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error