Trap Analysis of "Covenant” Field in Niger Delta, Nigeria

Authors

  • T. A. Adagunodo Department of Physics, Covenant University, Ota, Ogun State
  • L. A. Sunmonu Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso
  • O. T. Kayode Department of Physics, Covenant University, Ota, Ogun State
  • I. A. Ojoawo Department of Physics, University of Ibadan, Ibadan

DOI:

https://doi.org/10.26713/jims.v9i2.730

Keywords:

Trap, Fault, Seismic data, Well log data, Shale gouge ratio, Reservoirs, "Covenant” field

Abstract

The tendency to identify leaking zones is essential tool in trap assessment. Faults play an important role in creation of hydrocarbon traps. For volumetric analysis of a field to be meaningful, it is essential to analyze the faults contributing to the accumulation of hydrocarbons in a trap. These faults may be sealing or act as conduit to fluid flow. Analysis of trap is therefore carried out with the aim to reduce the uncertainties associated with hydrocarbon exploration and exploitation in Niger-Delta using "Covenant” field as a case study. The aim of the study is achieved using three dimensional seismic and well log data. Three reservoirs were mapped on the field while the fault supporting the identified trap was analyzed via throw, shale volume, shale gouge ratio, and hydrocarbon column heights attributes. The volume of shale model shows the presence of shale and sandstone formations in the fault plane. The fault-horizon's intersection (throw) model reveals that the horizons were not too deviated from where the maximum fault's displacement was noticed. The estimated shale gouge ratio of the fault on the analyzed trap reveals that the shallow sand horizon is supported by moderate sealing plane while that of mid and deep sand horizons are supported by proper sealing fault plane. The hydrocarbon column height model reveals a column height of 120m supports the shallow sand horizon while column heights \(> 180\) m support the mid and deep sand horizons respectively. It was inferred that despite the three horizons are supported by sealing fault zone, leakage still occurs at shallow sand horizon which correspond to a moderately sealed plane from SGR.

Downloads

Download data is not yet available.

References

T.A. Adagunodo and L.A. Sunmonu, Earthquake: a terrifying of all natural phenomena, Journal of Advances in Biological and Basic Research 1 (1) (2015), 4 – 11.

T.A. Adagunodo, L.A. Sunmonu and M.A. Adabanija, Reservoir characterization and seal integrity of Jemir field in Niger Delta, Nigeria, Journal of African Earth Sciences 129 (2017), 779 – 791.

T.A. Adagunodo, L.A. Sunmonu, M.A. Adabanija, O.P. Oladejo and A.A. Adeniji, Analysis of fault zones for reservoir modeling in Taa Field, Niger Delta, Nigeria, Petroleum and Coal 59 (3) (2017b), 378 – 388.

T.C. Ajisafe and B.D. Ako, 3-D seismic attributes for reservoir characterization of "Y” field Niger Delta, Nigeria, IOSR Journal of Applied Geology and Geophysics 1 (2) (2013), 23 – 31.

U.S. Allan, Model for hydrocarbon migration and entrapment within faulted structures, American Association of Petroleum Geologists Bulletin 73 (1989), 803 – 811.

P. Bretan, Trap analysis: an automated approach for deriving column height predictions in faultbounded traps, Petroleum Geoscience, doi:10.1144/10.44petgeo2016-022 (2016).

J. Caldwell, A. Chowdhury, P. Van Bemmel, F. Engelmark, L. Sonneland, N.S. Neidell, Exploring for Stratigraphic Traps, Winter 1997, Oilfield Review, 48 – 53 (1997).

J.E. Ejedawe, Patterns of incidence of oil reserves in Niger Delta Basin, AAPG Bulletin 65 (1981), 1574 – 1585.

S.R. Freeman, S.D. Harris and R.J. Knipe, Integrating structural uncertainty into reservoir simulation, Search and Discovery article #40595 (2010), Adapted from oral presentation at AAPG convention, New Orleans, Louisiana, April 11-14, 2010.

A.D. Irving, E. Chavanne, V. Faure, P. Buffet and E. Barber, An uncertainty modelling workflow for structurally compartmentalized reservoirs, Geological Society, London, Special Publications 347, 283 – 299 (2010).

Landmark Graphics Corporation, Discovery TM Halliburton, GeoGraphix Project Explorer, Version 5000.0.0.0 (2008).

R. Rider, The Geological Interpretation of Well Logs, Chapter 7, 2nd ed., Whittles Publishing, pp. 67 – 90, Caithness Scotland (2000).

T.R. Sahoo, R. Tuser, S. Nayak, S. Sankar, S. Senapati and Y.N. Singh, Fault seal analysis: a method to reduce uncertainty in hydrocarbon exploration, Case study: northern part of Cambay Basin, 8th Biennial International Conference and Exposition on Petroleum Geophysics, 1 – 9 (2010).

H.H. Soleng, J.C. Rivenaes, J. Gjerde, K. Hollund and L. Holden, Structural uncertainty modelling and the representation of faults as staircases, 9th European Conference of the Mathematics of oil Recovery – Cannes, France (30 August 30-September 2, 2004) (2004).

L.A. Sunmonu, M.A. Adabanija, T.A. Adagunodo and A.A. Adeniji, Reservoir characterization and by-passed pay analysis of Philus Field in Niger Delta, Nigeria, International Journal of Advanced Geosciences 4 (2) (2016), 28 – 41.

P. Weimer and R.M. Slatt, Petroleum traps in deepwater settings, 2004 Distinguished Instructor Short Course Series, No. 7, doi:10.1190/1.9781560801955.ch9 (2004).

G. Yielding, Trapping of Bouyant Fluid in Fault-Bound Structures, Geological Society of London, 421, doi:10.1144/SP421.3 (2015).

G. Yielding, B. Freeman and D.T. Needham, Quantitative fault seal prediction, American Association of Petroleum Geologists Bulletin 81 (1997), 897 – 917.

G. Yielding, Shale Gouge Ratio-Calibration by Geohistory, in A.G. Koestler and R. Hunsdale, Hydrocarbon Seal Quantification, Norwegian Petroleum Society Special Publication, 11, 109 – 125 (2002).

H. Doust and E. Omatsola, Niger delta, in: J.D. Edwards and P.A. Santogrossi (eds.), Divergent/Passive Margin Basins, AAPG Memoir 48, Tulsa, American Association of Petroleum Geologists (1990), 239 – 248.

Badleys Geoscience Limited, Reference Manual, Trap Tester 7, pp 4.1 – 4.12.

Downloads

Published

2017-08-30
CITATION

How to Cite

Adagunodo, T. A., Sunmonu, L. A., Kayode, O. T., & Ojoawo, I. A. (2017). Trap Analysis of "Covenant” Field in Niger Delta, Nigeria. Journal of Informatics and Mathematical Sciences, 9(2), 257–271. https://doi.org/10.26713/jims.v9i2.730

Issue

Vol. 9 No. 2 (2017)

Section

Research Articles

License

Authors who publish with this journal agree to the following terms:
  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a CCAL that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  • Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.