Seismic stratigraphic analysis for hydrocarbon exploration in the Beta Field, Coastal Swamp Depobelt, Niger Delta

• Autorzy: Adeleye Mutiu A. , Yekeen Kazeem O. , Amidu Sikiru A.

Identyfikatory

DOI

10.7494/geol.2020.46.4.259

• Języki publikacji: EN

Abstrakty

EN

Hydrocarbon exploration analysis from a seismic stratigraphic approach was carried out within the Beta Field, Coastal Swamp Depobelt, Niger Delta, to identify system tracts and sequence boundaries that could be associated with potential hydrocarbon accumulation. 3D seismic volume and data from four wells were analyzed. Depositional sequences, system tracts, sequence boundaries, and candidate maximum flooding surfaces were picked from logs, while reflection patterns and terminations were interpreted from seismic sections. Log shapes from gamma rays in combination with seismic facies analysis were interpreted in order to delineate lithology, depositional environments and depositional sequences. Seismic attributes were extracted and were draped on gridded surfaces from the interpreted seismic horizons. These were integrated with structure maps to obtain structural and stratigraphic trends, and possible presence of reservoir sand. Five depositional sequences and nine seismic facies were identified within the field. The depositional sequences were designated Sequences S1 to S5 based on the depth of the occurrences and stacking patterns. This study reveals a progression from fluvial depositional settings to the shelf. The main reservoirs identified are the sand units of the highstand and lowstand within three depositional sequences (S1, S4 and S5) although interbedded sands within the TST of S4 and S5 are also suspected of being potential reservoirs. The channel sand deposits within the study area are suspected to be hydrocarbon bearing as they occurred within the complex fault trapping system popular in the Niger Delta. The application of seismic stratigraphy, as shown in this study, serves to encourage exploration in the Niger Delta where it could be effectively employed for reducing risk in hydrocarbon exploration.

Słowa kluczowe

EN

seismic stratigraphy; system tracts; sequence boundary; depositional sequences; reservoir presence; Nigeria

PL

stratygrafia sejsmiczna; ciągi systemowe; granica sekwencji; sekwencje depozycji; Nigeria

• Wydawca: Wydawnictwa AGH
• Czasopismo: Geology, Geophysics and Environment
• Rocznik: 2020
• Tom: Vol. 46, no. 4
• Strony: 259--271
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr.

Twórcy

autor

Adeleye Mutiu A.

• University of Ibadan, Department of Geology; Ibadan, Nigeria

• https://orcid.org/0000-0002-6915-3043

autor

Yekeen Kazeem O.

• University of Ibadan, Department of Geology; Ibadan, Nigeria

autor

Amidu Sikiru A.

• Mobil Producing Nigeria Unltd, I Lekki-Expressway; Victoria Island, Lagos, Nigeria

Bibliografia

• Armentrout J.M. & Perkin B.F. (eds.), 1991. Sequence Stratigraphy as an Exploration Tool: Concepts and Practices in the Gulf Coast. 11th Annual Research Conference, SEPM Society for Sedimentary Geology.
• Brown L.F. & Fisher W.L., 1977. Seismic stratigraphic interpretation of depositional systems: Examples from Brazilian rift and pull-apart basins. [in:] Payton Ch.E. (ed.), Seismic Stratigraphy: Applications to Hydrocarbon Exploration, AAPG Memoir, 26, American Association of Petroleum Geologists, Tulsa, 213–248.
• Catuneanu O., 2006. Principles of Sequence Stratigraphy. Elsevier, Amsterdam, Netherland.
• Cawthra H.C., Frenzel P., Hahn A., Compton J.S., Gander L. & Zabel M., 2020. Seismic stratigraphy of the inner to mid Agulhas bank, South Africa. Quaternary Science Reviews, 235, 105979.
• Davies R.J., Cartwright J.A., Stewart S.A., Lappin M. & Underhill J.R. (eds.), 2004. 3D Seismic Technology: Application to the Exploration of Sedimentary Basins. Geological Society Memoir, 29, Geological Society of London.
• Cross T.A. & Lessenger M.A., 1988. Seismic Stratigraphy. Annual Review of Earth Planetary Sciences, 16, 319–354.
• Doust H., 1990. Petroleum Geology of the Niger Delta. [in:] Brooks J. (ed.), Classic Petroleum Provinces, Geological Society Special Publication, 50, Geological Society of London, 365.
• Doust H. & Omatsola E., 1990. Niger Delta. [in:] Edwards J.D. & Santogrossi P.A. (eds.), Divergent/Passive Margin Basins, AAPG Memoir, 48, American Association of Petroleum Geologists, Tulsa, 239–248.
• Ejedawe J.E., 1981. Patterns of incidence of oil reserves in Niger Delta Basin. American Association of Petroleum Geologists Bulletin, 65, 1574–1585.
• Ejedawe J.E., Coker S.J.L., Lambert-Aikhionbare D.O., Alofe K.B. & Adoh F.O., 1984. Evolution of oil-generative window and oil and gas occurrence in Tertiary Niger Delta Basin. American Association of Petroleum Geologists Bulletin, 68, 1744–1751.
• Ekweozor C.M. & Daukoru E.M., 1984. Petroleum source bed evaluation of Tertiary Niger Delta – reply. American Association of Petroleum Geologists Bulletin, 68, 390–394.
• Ekweozor C.M. & Daukoru E.M., 1994. Northern delta depobelt portion of the Akata-Agbada(!) petroleum system, Niger Delta, Nigeria. [in:] Magoon L.B. & Dow W.G. (eds.), The Petroleum System – From Source to Trap, AAPG Memoir, 60, American Association of Petroleum Geologists, Tulsa, 599–614.
• Ekweozor C.M., Okogun J.I., Ekong D.E.U. & Maxwell J.R., 1979. Preliminary organic geochemical studies of samples from the Niger Delta, Nigeria: Part 1, analysis of crude oils for triterpanes. Chemical Geology, 27, 11–28.
• Galloway W.E., 1975. Process framework for describing the morphologic and stratigraphic evolution of deltaic depositional systems. [in:] Broussard M.L. (ed.), Deltas: Models for Exploration, Houston Geological Society, 87–98.
• Galloway W.E., 1976. Sediments and stratigraphic framework of the Copper River fan-delta, Alaska. Journal of Sedimetary Petrology, 46, 726–737.
• Galloway W.E., 1998. Siliciclastic slope and base of slope depositional systems: Component facies, stratigraphic architecture, and classification. American Association of Petroleum Geologists Bulletin, 82, 569–595.
• Galloway W.E. & Hobday D.K., 1983. Terrigenous Clastic Depositional Systems. Springer Verlag, New York.
• Miall A.D., 1991. Stratigraphic sequences and their chronostratigraphic correlation. Journal of Sedimentary Petrology, 61, 497–505.
• Mitchum R.M., Jr., Vail P.R. & Sangree J.B., 1977. Seismic stratigraphy and global change of sea level, Part 6: Stratigraphic interpretation of seismic reflection patterns in depositional sequences. [in:] Payton Ch.E. (ed.), Seismic Stratigraphy: Applications to Hydrocarbon Exploration, AAPG Memoir, 26, American Association of Petroleum Geologists, Tulsa, 117–133.
• Murat R.C., 1972. Stratigraphy and paleogeography of the Cretaceous and Lower Tertiary in Southern Nigeria. [in:] Dessauvigie T.F.J. & Whiteman A.J. (eds.), African Geology, University of Ibadan Press, Ibadan, 635–648.
• Payton Ch.E., 1977. Seismic Stratigraphy: Application to Hydrocarbon Exploration. AAPG Memoir, 26, American Association of Petroleum Geologists, Tulsa.
• Paumard V., Bourget J., Durot B., Lacaze S., Payenberg T., George A.D. & Lang S., 2019. Full-volume 3D seismic interpretation methods: A new step towards high-resolution seismic stratigraphy. Interpretation, 7(2), B33–B47.
• Posamentier H.W. & George P.A., 1994. Siliciclastic Sequence Stratigraphy: Concepts and Application. AAPG Short Course, 10, SEPM Society for Sedimentary Geology.
• Ramsayer G.R., 1979. Seismic stratigraphy, a fundamental exploration tool. [in:] Offshore Technology Conference, 30 April–3 May, Houston, Texas, 101–109.
• Slatt R.M., 2013. Deepwater deposits and reservoirs. Development in Geosciences, 61, 475–552.
• Snedden J.W. & Sarg J.F., 2008. Seismic Stratigraphy – A Primer on Methodology. AAPG Search and Discovery Article, American Association of Petroleum Geologists, Tulsa.
• Van Wagoner J.C., Posamentier H.W., Mitchum R.M., Vail P.R., Sarg J.F., Loutit T.S. & Hardenbol J., 1988. An overview of the fundamentals of sequence stratigraphy and key Definitions. [in:] Wilgus C.K., Hastings B.S., Ross C.A., Posamentier H., Van Wagoner J.C., Kendall C.G.St.C. (eds.), Sea-Level Changes: An Integrated Approach, Society of Economic Paleontologists and Mineralogists Special Publication, 42, Society of Economic Paleontologists and Mineralogists, 39–45.
• Van Wagoner J.C., Mitchum R.M., Campion K.M. & Rahmanian V.D., 1990. Siliciclastic Sequence Stratigraphy in Well Logs, Cores, and Outcrops. AAPG Methods in Exploration Series, 7, American Association Petroleum Geologists, Tulsa.
• Veeken P.C.H., 2007. Seismic Stratigraphy, Basin Analysis and Reservoir Characterization. Handbook of Geophysical Exploration: Seismic Exploration, 37, Elsevier.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).