Reservoir Study Analysis Using Petrophysical Properties of Reservoir Rocks of an Offshore Field in Niger Delta Basin
Asian Journal of Geological Research,
Page 11-30
Abstract
A qualitative and quantitative reservoir study of an offshore field (BAK field), was carried out using the analyses of the petrophysical properties of the reservoir rocks in the field for proper planning and optimum production development of the field. Five wells data from the field were utilized for the study and from the analyses of these wells, three reservoir intervals were identified through quantitative interpretation, while reservoir correlation was performed to identify the lithostratigraphic sand unit within the well formations, with the top and base markers distinguishing the respective reservoirs mapped within the wells, the sand bodies of the reservoirs were found to be heterogeneous and continuous. The three reservoir intervals identified were named: BAK_1, BAK_2, and BAK_3 reservoirs respectively, the reservoir sedimentology revealed that the reservoirs were predominantly sands with intercalated shale within the formations. The results of petrophysical analysis revealed that the Net-to-Gross (N/G) values within the identified reservoir were 83%, 86%, and 85% for BAK_1, BAK_2, and BAK_3 reservoirs respectively, while the total porosity and effective porosity were found to be 28%, 27%, 28% and 24%, 24%,18% for BAK_1, BAK_2 and BAK_3 respectively. The permeability values were found to 2279.558 mD, 2178.738 mD, and 2760.678 mD while the water saturation estimated was 45%, 48%, and 48% for BAK_1, BAK_2, and BAK_3 reservoirs respectively. From the results of reservoir study of petrophysical properties, the reservoir can be said to have a low shale volume, excellent porosity, high permeability and low average water saturation. The field can thus be classified as a good candidate for development and optimum production of hydrocarbon.
Keywords:
- Quantitative analysis
- qualitative
- petrophysical
- lithostratigraphic
- heterogeneity
- optimum
- sedimentology
How to Cite
Sofolabo, A. O., & Ude, M. O. (2022). Reservoir Study Analysis Using Petrophysical Properties of Reservoir Rocks of an Offshore Field in Niger Delta Basin. Asian Journal of Geological Research, 5(1), 11-30. Retrieved from https://journalajoger.com/index.php/AJOGER/article/view/30149
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Adiela UP, Itiowe K, Emudianughe J. Seismic and petrophysical attributes of reservoirs in “Ebi” oil field, Niger Delta. International Journal of Science Inventions Today. 2016;5(3):273-282.
Obiekezie TN, Bassey EE. Petrophysical analysis and volumetric estimation of Otu feld, Niger Delta Nigeria, using 3D seismic and well log data. Physical Science International Journal. 2015;6(1):54–65.
Cannon AG. Petrophysics: A pratctical Guide, Wiley Blackwell. 2015;1- 224
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Avbovbo AA. Tertiary lithostratigraphy of Niger Delta. American Association of Petroleum Geologists Bulletin, Tulsa, Oklahoma. 1978;96–200.
Klett TR, Ahlbrat TS, Schmoker JW, Dolton JL. Ranking of the world‘s oil & gas provinces by known petroleum volumes. U.S. Geological Survey Open-file Report CD-ROM. 1997;97-463.
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Orife JM, Avbovbo AA. Stratigraphic and unconformity traps in the Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1982;65:251-265.
Corredor F, Shaw JH, Bilotti F. Structural styles in the deep-water fold and thrust belts of the Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 2005;89:753–780.
Short KC, Stauble AJ. Outline of geology of Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1967;51:761–779.
Weber KJ, Daukoru E. Petroleum Geology of the Niger Delta. Ninth World Petroleum Congress Proceedings. 1975;2:209–221.
Weber KJ. Hydrocarbon distribution patterns in Nigerian growth fault structures controlled by structural style & Stratigraphy. Journal of Petroleum Science and Engineering. 1987;1:91-104.
Nwachukwu JI, Chukwurah PI. Organic Matter of Agbada Formation, Niger Delta, Nigeria. American Association of Petroleum Geologist Bulletin. 1986;70:48-55.
Stacher P. Present understanding of the Niger delta hydrocarbon habitat: Geology of Deltas. AA Balkema, Rotterdam. 1995; 257–267.
Ejedawe JE, Coker SJL, Lambert-Aikhionbare DO, Alofe KB, Adoh, FO. Evolution of Oil Generating Window and Gas. American Association of Petroleum Geologist (AAPG) Bulletin. 1984;68:1744-1751.
Beka FT, Oti MN. The distal offshore Niger Delta: frontier prospects of a mature petroleum province, in, Oti, M.N., & Postma G, (eds).,Geology of Deltas. Rotterdam, A.A. Balkema,. 1995;237-241.
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Adeoti L, Ayolabi EA, James PL. An Integrated Approach to Volume of Shale Analysis: Niger Delta Example, Orire Field. World Applied Sciences Journal. 2009; 7(4):448-452.
Adiela UP. Reservoir and Petrophysical studies of Kora Well Onshore, Niger Delta Field, Nigeria. International Journal of Innovative Research in Science, Engineering and Technology. 2018;7(11).
Archie GE. The electrical resistivity log as an aid in determining some reservoir characteristics. Journal of Petroleum Technology. 1942;5:54-62.
Burke K. Longshore drift, submarine canyons, & submarine fans in Development of Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1972;56:1975-1983.
Edohor EH, Ayomide BO. Petrophysical evaluation of h-field, onshore Niger Delta Sedimentary Basin, Nigeria. Asian Journal of Geological Research. 2020;3(2):1-16.
Eke IJ. Petrophysical evaluation of hydrocarbon bearing sands in “MANIN” marginal field, Onshore Niger Delta. Journal of Applied Geology and Geophysics (IOSR-JAGG). 2020;8(3):2.
Ekweozor CM, Okoye NV. Petroleum source-bed evaluation of Tertiary Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1980;64:1251-1259.
Eze MO, Mode AW, Anyiam AO. Recognition and evaluation of low resistivity pay-zones: A case study of “Amo-Field” in the Tertiary Niger Delta Basin, Nigeria. The Pacific Journal of Science and Technology. 2016;17(1):21-32
Hilchie DW. Applied openhole log interpretation. D.W. Hilchie, Inc.: Golden, CO. 1978;1-161.
Hunt JM. Generation & migration of petroleum from abnormally pressured fluid compartments. American Association of Petroleum Geologists Bulletin. 1990;74:1-12.
Ideozu UR, Ehilegbu MN, Okujagu DC. Petrophysical analysis of Egbu Field, Offshore Niger Delta, Nigeria, Using Well Log, Core Data and Pearson’s Matrices. Journal of Mining and Geology. 2020; 56(2):329-346.
Kulke H. Nigeria, in, Kulke, H., ed., Regional Petroleum Geology of the World. Part II. frica, America, Australia and Antarctica: Berlin, GebrüderBorntraeger, Germany. 1995;143-172.
Larionov V. Borehole radiometry: Moscow, U.S.S.R., Nedra. 1969;34-45.
Ogidi AO, Ekhalialu OM, Okon EE. Petrophysical Evaluation of Otebe Field, Onshore Niger Delta, Nigeria. International Journal of Research and Innovation in Applied Science. 2018;3(11).
Oyeyemi KD, Olowokere MT, Aizebeokha AP. Hydrocarbon resource evaluation using combined petrophysical analysis and seismically derived reservoir characteri-zation, offshore Niger Delta. Journal of Petroluem Exploration and Production Technology. 2017;3:35-48
Paul SS, Okwueze EE, Udo KI. Petrophysical Analysis of Well Logs for the Estimation of Oil Reserves in Southern Niger Delta. International Journal of Advanced Geosciences. 2018;6(1):140-145.
Peters EJ. Petrophysics. Department of Petroleum and Geosystems Engineering, The University of Texas at Austin. 2001;1-184.
Saleh MB, Babajika MI, Terrang SU. Geology and Petrophysical Analysis of Oredo Oil Field in Niger Delta Basin, Southern Nigeria. International Journal of Science and Research. 2018;301-306.
Sanuade OA, Akanji AO, Olaojo AA, Oyeyemi KD. Seismic interpretation and petrophysical evaluation of SH field, Niger Delta. Journal of Petroluem Exploration and Production Technology. 2017;2:1-21.
Schlumberger. Log interpretation, principles, and application. Schlumberger wireline and testing. Texas, USA. 1985; 21-89.
Victor CN, Ezenwaka KC, Ede TA. Evaluation of hydrocarbon reserves using integrated petrophysical analysis and seismic interpretation: A case study of TIM field at southwestern offshore Niger Delta oil Province, Nigeria. Egyptian Journal of Petroleum. 2019;28:273 -280.
Evamy BD, Haremboure J, Kamerling P, Knaap WA, Molloy FA, Rowlands PH. Hydrocarbon habitat of Tertiary Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1978;62:277-298.
Adiela UP, Itiowe K, Emudianughe J. Seismic and petrophysical attributes of reservoirs in “Ebi” oil field, Niger Delta. International Journal of Science Inventions Today. 2016;5(3):273-282.
Obiekezie TN, Bassey EE. Petrophysical analysis and volumetric estimation of Otu feld, Niger Delta Nigeria, using 3D seismic and well log data. Physical Science International Journal. 2015;6(1):54–65.
Cannon AG. Petrophysics: A pratctical Guide, Wiley Blackwell. 2015;1- 224
Ekine AS, Iyabe P. Petrophysical characterization of the Kwale field reservoir sands (OML 60) from wire-line logs, Niger Delta, Nigeria. Journal of Applied Science and Environmental Management. 2009; 13(4):81–85.
Avbovbo AA. Tertiary lithostratigraphy of Niger Delta. American Association of Petroleum Geologists Bulletin, Tulsa, Oklahoma. 1978;96–200.
Klett TR, Ahlbrat TS, Schmoker JW, Dolton JL. Ranking of the world‘s oil & gas provinces by known petroleum volumes. U.S. Geological Survey Open-file Report CD-ROM. 1997;97-463.
Doust H, Omatsola E. Niger Delta. In: Edwards, J. D., and Santogrossi, P.A., eds., Divergent/passive Margin Basins. American Association of Petroleum Geo-logists (AAPG) Memoir. 1990;48:239-248.
Weber KJ. Sedimentological aspects of oil fields in Niger Delta. Geologize en Mingbouw. 1971;50:559-576.
Hospers J. Gravity field & structure of the Niger Delta, Nigeria, West Africa. Geological Society of American (AAPG) Bulletin. 1965;76:407-422.
Merki P. Structural Geology of the Cenozoic Niger Delta. Africa Geology, University of Ibadan Press. T.F.J. 1970;1- 268.
Ekweozor CM, Daukoru EM. Northern delta Depobelt portion of the Akata – Agbada Petroleum system, Niger Delta: In Magoon, L.B. and Dow, W.G. (Eds). The petroleum system from source to trap. American Association of Petroleum Geologists (AAPG) Memoir. 1994;4(6): 599–613.
Orife JM, Avbovbo AA. Stratigraphic and unconformity traps in the Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1982;65:251-265.
Corredor F, Shaw JH, Bilotti F. Structural styles in the deep-water fold and thrust belts of the Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 2005;89:753–780.
Short KC, Stauble AJ. Outline of geology of Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1967;51:761–779.
Weber KJ, Daukoru E. Petroleum Geology of the Niger Delta. Ninth World Petroleum Congress Proceedings. 1975;2:209–221.
Weber KJ. Hydrocarbon distribution patterns in Nigerian growth fault structures controlled by structural style & Stratigraphy. Journal of Petroleum Science and Engineering. 1987;1:91-104.
Nwachukwu JI, Chukwurah PI. Organic Matter of Agbada Formation, Niger Delta, Nigeria. American Association of Petroleum Geologist Bulletin. 1986;70:48-55.
Stacher P. Present understanding of the Niger delta hydrocarbon habitat: Geology of Deltas. AA Balkema, Rotterdam. 1995; 257–267.
Ejedawe JE, Coker SJL, Lambert-Aikhionbare DO, Alofe KB, Adoh, FO. Evolution of Oil Generating Window and Gas. American Association of Petroleum Geologist (AAPG) Bulletin. 1984;68:1744-1751.
Beka FT, Oti MN. The distal offshore Niger Delta: frontier prospects of a mature petroleum province, in, Oti, M.N., & Postma G, (eds).,Geology of Deltas. Rotterdam, A.A. Balkema,. 1995;237-241.
[23]. Tissot BP. Petroleum Formation and Occurrence. Berlin, Springer-Verlag. 1954; 1-518.
Adeoti L, Ayolabi EA, James PL. An Integrated Approach to Volume of Shale Analysis: Niger Delta Example, Orire Field. World Applied Sciences Journal. 2009; 7(4):448-452.
Adiela UP. Reservoir and Petrophysical studies of Kora Well Onshore, Niger Delta Field, Nigeria. International Journal of Innovative Research in Science, Engineering and Technology. 2018;7(11).
Archie GE. The electrical resistivity log as an aid in determining some reservoir characteristics. Journal of Petroleum Technology. 1942;5:54-62.
Burke K. Longshore drift, submarine canyons, & submarine fans in Development of Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1972;56:1975-1983.
Edohor EH, Ayomide BO. Petrophysical evaluation of h-field, onshore Niger Delta Sedimentary Basin, Nigeria. Asian Journal of Geological Research. 2020;3(2):1-16.
Eke IJ. Petrophysical evaluation of hydrocarbon bearing sands in “MANIN” marginal field, Onshore Niger Delta. Journal of Applied Geology and Geophysics (IOSR-JAGG). 2020;8(3):2.
Ekweozor CM, Okoye NV. Petroleum source-bed evaluation of Tertiary Niger Delta. American Association of Petroleum Geologists (AAPG) Bulletin. 1980;64:1251-1259.
Eze MO, Mode AW, Anyiam AO. Recognition and evaluation of low resistivity pay-zones: A case study of “Amo-Field” in the Tertiary Niger Delta Basin, Nigeria. The Pacific Journal of Science and Technology. 2016;17(1):21-32
Hilchie DW. Applied openhole log interpretation. D.W. Hilchie, Inc.: Golden, CO. 1978;1-161.
Hunt JM. Generation & migration of petroleum from abnormally pressured fluid compartments. American Association of Petroleum Geologists Bulletin. 1990;74:1-12.
Ideozu UR, Ehilegbu MN, Okujagu DC. Petrophysical analysis of Egbu Field, Offshore Niger Delta, Nigeria, Using Well Log, Core Data and Pearson’s Matrices. Journal of Mining and Geology. 2020; 56(2):329-346.
Kulke H. Nigeria, in, Kulke, H., ed., Regional Petroleum Geology of the World. Part II. frica, America, Australia and Antarctica: Berlin, GebrüderBorntraeger, Germany. 1995;143-172.
Larionov V. Borehole radiometry: Moscow, U.S.S.R., Nedra. 1969;34-45.
Ogidi AO, Ekhalialu OM, Okon EE. Petrophysical Evaluation of Otebe Field, Onshore Niger Delta, Nigeria. International Journal of Research and Innovation in Applied Science. 2018;3(11).
Oyeyemi KD, Olowokere MT, Aizebeokha AP. Hydrocarbon resource evaluation using combined petrophysical analysis and seismically derived reservoir characteri-zation, offshore Niger Delta. Journal of Petroluem Exploration and Production Technology. 2017;3:35-48
Paul SS, Okwueze EE, Udo KI. Petrophysical Analysis of Well Logs for the Estimation of Oil Reserves in Southern Niger Delta. International Journal of Advanced Geosciences. 2018;6(1):140-145.
Peters EJ. Petrophysics. Department of Petroleum and Geosystems Engineering, The University of Texas at Austin. 2001;1-184.
Saleh MB, Babajika MI, Terrang SU. Geology and Petrophysical Analysis of Oredo Oil Field in Niger Delta Basin, Southern Nigeria. International Journal of Science and Research. 2018;301-306.
Sanuade OA, Akanji AO, Olaojo AA, Oyeyemi KD. Seismic interpretation and petrophysical evaluation of SH field, Niger Delta. Journal of Petroluem Exploration and Production Technology. 2017;2:1-21.
Schlumberger. Log interpretation, principles, and application. Schlumberger wireline and testing. Texas, USA. 1985; 21-89.
Victor CN, Ezenwaka KC, Ede TA. Evaluation of hydrocarbon reserves using integrated petrophysical analysis and seismic interpretation: A case study of TIM field at southwestern offshore Niger Delta oil Province, Nigeria. Egyptian Journal of Petroleum. 2019;28:273 -280.
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