Sequence Stratigraphy Evaluation of Meren Field Sediment Using Biostratigraphy and Paleobathymetry Approach

Cynthia B Nwadike; Samuel O Onyekuru; Sabinus I Ibeneme; Emelu C Okalla; Chukwuebuka F Dike

doi:10.56201/rjpst.vol.8.no5.2025.pg133.151

📄 Download Paper

Sequence Stratigraphy Evaluation of Meren Field Sediment Using Biostratigraphy and Paleobathymetry Approach

Cynthia B Nwadike, Samuel O Onyekuru, Sabinus I Ibeneme, Emelu C Okalla, Chukwuebuka F Dike

Abstract

Sequence Stratigraphy (SS) studies the relationship between rock matters or formation within a chronostratigraphic system, in which the rock’s sequence cyclic and basically composed of genetically tied layer units. In this study, well logs and biostratigraphic data were employed in the reconstruction of SS framework for Meren 01 and 02 Wells in the Meren Field offshore Niger Delta. A total of thirty (163) samples were examined for microfossils. Additionally, the samples were subjected to detailed description based on their respective lithology. The Gamma Ray (GR) log pattern and microfossil abundance and diversity were used to delineate the sequences to different kinds of system tracts. Accordingly, four depositional sequences were identified comprising of five Sequence Boundaries (SB). The key stratigraphic surfaces which were identified using index microfossils and higher GR count can be used for basin wide correlation. From the correlation chart, the MFS are associated with diversity of microfossils and high concentration of radioactive minerals that gave rise to high GR reading at this surface unlike the Sequence Boundary where fewer or no microfossils were identified with low GR readings. The dated stratigraphic surfaces corroborated with established shifts landward and basin ward according to established schemes. Giving the available data from biostratigraphy and GR log, the environment of deposition was inferred to trend from coastal deltaic to marine. The environments over which sediments of Meren-01 and 02 were deposited have been investigated through the integration of sedimentological, palynological and micropaleontological characteristics of these sediments

Keywords

Biostraigraphysequence stratigraphyWell logDepositional environmentMeren

References

[1] S.O. Onyekuru, E.C. Ibelegbu, J.C. Iwuagwu, A.G. Essien, C.Z. Akaolisa. Sequence Stratigraphic Analysis of “XB Field”, Central Swamp Depobelt, Niger Delta Basin, Southern Nigeria. International Journal of Geosciences, 2012, 3(01): 237. http://dx.doi.org/10.4236/ijg.2012.31027 [2] O.A. Olatunji. Sequence Stratigraphic Analysis of HB-001 and HD-001 Wells, Niger Delta Basin, Nigeria. Petroleum & Coal, 2023, 65(1): 209-221. https://www.vurup.sk/wpcontent/uploads/2023/02/PC-X_Olatunji_2022__51.pdf [3] S.O. Obaje. Seismic interpretation of Tomboy Field, offshore western Niger Delta, Nigeria. Intl. J. Sci. & Tech., 2013, 2(9): 648-660. [4] N.G. Obaje. Fairways and reservoir prospects of Pliocene-Recent sands in the shallow offshore Niger Delta, Nigeria. Journal of Mining and Geology, 2004, 40(2), 133 – 142. [5] O.A. Magbagbeola. Sequence Stratigraphy of Niger-Delta, Robertkiri Field, Onshore Nigeria. Master’ Thesis, Texas A&M University. 2005. [6] O.A. Magbagbeola and A.I. Olayinka. Sequence Stratigraphy of Niger Delta- A New Look at “Ake and Eta” Fields Onshore, Western Niger Delta. NAPE Bulletin, 2019, Vol 2(28):Pp 12-23. [7] C.E. Okpala, O.W. Osisanya, F.C. Ighrakpata, A.S. Saleh and T.A. Ibitoye. Sequence Stratigraphic Interpretation of XY-Field Onshore Niger Delta Basin Nigeria. JournalApplied Science Environment Management, 2021, Vol. 25(12): Pp 2001-2011. [8] S.O. Onyekuru, V.N. Chiokwe, I. Njoku, K.K. Nwozor, C.P. Chikezie and V.I. Fagorite. Sequence Stratigraphy and Reservoir Quality Assessment of “SOKA” Field, Coastal Swamp, Niger Delta Basin, Southern Nigeria. Petroleum and Coal. 2024, Vol. 66(1): 206- 222. [9] H. Doust and E. Omatsola. Niger Delta: American Association of Petroleum Geologists Memoir, 1989, 48: 201-238. [10] L.W. Tuttle, R.R Charpentier and M.E. Brownfield. The Niger Delta Petroleum System: Niger Delta Province, Nigeria, Cameroon, and Equatorial Guinea, Africa: U.S. Geological Survey World Energy Project, Open-File Report, 1999, 99-50-H. [11] K.C. Short and A.J. Stauble. Outline of Geology of Niger Delta: American Association of Petroleum Geologists Bulletin, 1967, v. 51: 761-779. [12] P. Stacher. Present understanding of the Niger Delta hydrocarbon habitat, in M.N. Oti, and G. Postma, eds., Geology of Deltas: Rotterdam, A.A. Balkema, 1995, p. 257-267 [13] P.R. Vail and J.R. Wornardt, J.R. Well log-seismic sequence stratigraphy, course notes behalf of Global Geotechnical & Mosunmolu limited, November 26–28th 1992, Lagos, Nigeria, 490 pp. [14] D. Stains. Principles of lithostratigraphic classification: Definition and application. American Journal of Science, 1985, 285(8), 763-784. [15] O.S. Adegoke, R.E. Chêne, M.A. Sowunmi, &M.B. Salami. Palynology and micropaleontology of the upper Senonian and Maastrichtian of SW Nigeria. Palaeogeography, Palaeoclimatology, Palaeoecology, 1976, 19(3), 169-188. [16] F.P.C.M. Van Morkhoven, F. P. C. M. Atlas of Paleogene Foraminifera. Elsevier. [17] J.W. Murray. Ecology and palaeoecology of benthic foraminifera. Longman Scientific & Technical, 1991.[18] O.A. Anyiam, J.N. Eradiri, A.W. Mode, C.G. Okeugo, I.C. Okwara& P.O. Ibemesi Sequence stratigraphic analysis and reservoir quality assessment of an onshore field, Central Swamp Depobelt, Niger Delta Basin, Nigeria. Arab. J. Geosci., 2019, 12(24): 1-19. [19] T.J.A. Reijers. Stratigraphy and sedimentology of the Niger Delta. Geologos, 2011,17(3): 133-162. [20] E.I. Akaerue, J.N. Nnakuba, J.G. Urang, E.D. Ebong, J.N. Eradiri, &A.N. Ubgaja. Electrosequence analysis and natural resources potential of a transitional environment in central swamp Depobelt, Niger Delta. Nigeria. J. Petrol. Explor. Prod. Technol, 2022,12: 2381- 2403. [21] B.D. Evamy, J. Haremboure, P. Kamerling, W.A. Knaap, F.A. Molloy and P.H. Rowlands. Hydrocarbon habitat of tertiary Niger delta. AAPG Bull., 1978; 62: 1–39. [22] M. Shepherd. Deltaic reservoirs, American Association of Petroleum Geologists Memoir 91. in M. Shepherd (ed), Oil Field Production Geology, 2009; 279–288. [23] O. Catuneanu, W.E. Galloway, C.G. Kendall, A.D. Miall, H.W. Posamentier, A. Strasser, and M.E. Tucker. Sequence Stratigraphy: Methodology and Nomenclenture. Gebruder Borntraeger, 2011, 44(3): 175-245

Sequence Stratigraphy Evaluation of Meren Field Sediment Using Biostratigraphy and Paleobathymetry Approach

Abstract

Keywords

References

More Articles from RESEARCH JOURNAL OF PURE SCIENCE AND TECHNOLOGY