Integration of Seismic and Well Log Data for Reservoir Characterization in Offshore Niger Delta, Nigeria

Ismaila Abiodun Akinlabi *

Department of Earth Sciences, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria.

Ayomide Oluwaseun Abiodun

Department of Earth Sciences, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria.

*Author to whom correspondence should be addressed.


Abstract

The demand for fossil fuels is continually increasing due to the growing global population and industrialization. It is thus necessary to find hydrocarbon prospects in new fields and those that have previously been classified as marginal fields in order to maximize production. An integrated approach is required to effectively characterize hydrocarbon reservoirs and assess their ability to store and produce hydrocarbons. 3D seismic reflection data and well log data were combined to quantitatively estimate hydrocarbon reserves in a field, offshore Niger delta, Nigeria. The reservoirs were delineated on the gamma ray and resistivity logs which penetrate four wells selected from the field. The petrophysical analysis provided information about the net-to-gross thickness ratio, porosity, shale volume and water saturation of the reservoirs, deduced from well log suites comprising gamma, resistivity, density and neutron-porosity logs through four wells. The seismic interpretation involved mapping of horizons and faults across the wells on the seismic section. Check shot data were used to tie the seismic data to the well log data to generate the synthetic seismogram. The time structural and depth structural maps were generated. The volumetric analysis entailed derivation of the Gross rock volume from the depth structural map, and estimation of the Stock Tank Oil Initially In Place (STOIIP). Four reservoirs were delineated in each of the four wells. The average thickness of the reservoirs ranges from 56.6 m to 232.7 m while the water saturation varies from 0.29% to 0.57%. The average porosities of the reservoirs ranges from 0.18% to 0.22%. The structural interpretation of the eight faults mapped reveals synthetic and antithetic faults, and rollover anticlines. The time- and depth structural maps generated from the mapped horizons show that the reservoirs are penetrated by the different faults. The Stock Tank Oil Initially In Place (STOIIP) of the reservoirs range from 25 MMstb to 468 MMstb. The study shows that the integration of 3D reflection data and well log data can be used effectively to estimate hydrocarbon reserves. The results of the study are expected to contribute to the development of new exploration and production strategies in the Niger delta basin and similar sedimentary environments.

Keywords: Reservoir characterization, well log data, seismic reflection data, hydrocarbon reserves, Niger delta


How to Cite

Akinlabi, I. A., & Abiodun , A. O. (2024). Integration of Seismic and Well Log Data for Reservoir Characterization in Offshore Niger Delta, Nigeria. Journal of Geography, Environment and Earth Science International, 28(6), 1–11. https://doi.org/10.9734/jgeesi/2024/v28i6774

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References

Adebowale KO, Adegbite IO, Babalola OA. Reservoir characterization and production optimization of an oil field in the Niger Delta, Nigeria. Journal of Petroleum Science and Engineering. 2015;138:105-117.

Adeoti AA, Adegbite OO, Oyedele OA. Integrated petrophysical and seismic analysis for reservoir characterization in the Aje field, offshore Nigeria. Journal of Petroleum Exploration and Production Technology. 2019;9(1):189-202.

Adigwe P, Inichinbia S. Reservoir characterization and volumetric analysis of Lee field, onshore Niger delta, using 3D seismic and well log data. Journal of apllied sciences and environmental management. 2020;23(12):2185.

Ibe CC, Ezekiel IO. Reservoir characterization and hydrocarbon potential of the Agbada Formation, Niger Delta Basin, Nigeria. Journal of Petroleum Science and Engineering. 2020;198:109293.

Omonigho EO, Enwerem JC, Ekine AA. Integrated reservoir characterization and modeling of the Akara field, Niger Delta Basin, Nigeria. Journal of Petroleum Exploration and Production Technology. 2021;11(1):387-402.

Mohamed Adel K, Ghazala H. Hosni, Mohamed, Lamees, Integration between well logging and seismic reflection techniques for structural analysis and reservoir characterizations, Abu El Gharadig basin, Egypt. NRIAG Journal of Astronomy and Geophysics. 2016;5:362- 379.

Okpoli CC, Arogunyo DI. Integration of well logs and seismic attribute analysis in reservoir identification on PGS field onshore Niger Delta, Nigeria. Pakistan Journal of Geology (PJG). 2020;4(1).

Chaki, Soumi, Routray, Aurobinda, and Mohanty, William K. Sub Surface exploration: recent advanceS in Geo-SiGnal processing, interpretation, and learning. Article in IEEE Signal Processing Magazine; March 2018. DOI: 10.1109/MSP.2017.2776602

Eshimokhai OS, Akande SO, Adegbite AS. Application of principal component analysis (PCA) and cluster analysis (CA) to well log data for reservoir characterization. Journal of Natural Gas Science and Engineering. 2012;14:658-667.

Ajisafe OA, Adegbite OO, Oyedele OO. Seismic data interpretation for hydrocarbon prospectivity assessment in the Niger Delta Basin, Nigeria. Journal of Petroleum Science and Engineering. 2013;111:21-29.

Amigun BA, Olukanni OA, Afolabi AO. 3D seismic data analysis for reservoir characterization in the Onshore Niger Delta, Nigeria. Journal of Petroleum Science and Engineering. 2013;111:12-20.

Nyantakyi EK, Owusu PA, Borkloe JK. Seismic data analysis for reservoir characterization in the Onshore Niger Delta, Nigeria. Journal of Petroleum Science and Engineering. 2013;111:12-20.

Obickezie EC. The use of seismic data to characterize the subsurface in Nigeria. Journal of Petroleum Science and Engineering. 2014;124:122-130.

Omoja UC, Obiekezie TN. Application of 3D seismic attribute analyses for hydrocarbon prospectivity in Uzot-Field, Onshore Niger Delta Basin, Nigeria. International Journal of Geophysics. 2019;1706416.

Available:https://doi.org/10.1155/2019/1706416

Edigbue CI, Ekong EE, Igwe AC. Reservoir characterization of "Keke" field, Niger Delta using 3D seismic and petrophysical data. Journal of Applied Geophysics. 2012;77:111-122.

Emujakporue Godwin, Nwankwo Cyril, Nwosu Leonard. Integration of well logs and seismic data for prospects evaluation of an X field, onshore Niger Delta, Nigeria. International Journal of Geosciences. 2012;3:872-877.

Emujakporue GO. Statistical analysis of geothermal data of an oil field, in parts of Niger Delta, Nigeria. Current Research in Geoscience. 2016;6(2):91-97.

Okeke CC, Nwokolo EC, Okoye EC. The impact of tax revenue on economic development in Nigeria: A case study of the Niger Delta region. Journal of Sustainable Development in Africa. 2018;20(1):133-142.

Obaje SS, Igwe CO, Okoye EC. Assessment of the impact of oil and gas exploration and exploitation on the environment of Niger Delta, Nigeria. Journal of Sustainable Development in Africa. 2017;19(3):150-161.

Tijani AA, Tijani AM. Environmental impact of oil and gas exploration and exploitation in Niger Delta, Nigeria: A review. Journal of Sustainable Development in Africa. 2018;20(1):114-122.

Ogala JE, Adegoke OA, Adegboyega AA. Geochemical and organic petrological study of bituminous sediments from Dahomey Basin, SW Nigeria. Journal of Petroleum Science and Engineering. 2019;179:106461.

Orodu AO, Afolabi OS, Akinlabi AA. Synthesis and characterization of alumina nanoparticles for oil spill remediation. Journal of Environmental Chemical Engineering. 2019;7(2):4230-4237.

Onojake O, Ekanem E, Okoro F, Nwadike C. Assessment of the impact of oil and gas exploration and production activities on water quality in the Niger Delta region of Nigeria. Environmental Science and Pollution Research. 2021;28(17):18584-18596.

Adedokun PO, Ogunjobi OA, Oyewo AA, Ilori O. Assessing the impact of climate change on coastal erosion in the Niger Delta. Nigeria Journal of Coastal Research. 2020;101:106-117.

Archie GE. Electrical resistivity log as an aid in determining some reservoir characteristics, Transactions, AIME. 1942;146:54-62.

Larinov VV. Radiometry of boreholes (in Russian) NEDRA Moscow; 1969.