Reservoir Characterization using Petrophysical Evaluation of W-Field, Onshore Niger Delta
Asian Journal of Physical and Chemical Sciences, Volume 11, Issue 2,
Reservoir characterization of W-field, onshore Niger Delta was carried out using petrophysical evaluation of well logs. Three reservoir sand intervals (A, B, C) were identified and correlated across four wells (W1, W2, W3, W4) in W-field using the gamma ray, while the fluid identification of each reservoir was achieved using the resistivity log. The reservoir C interval was selected and utilized for petrophysical interpretation was penetrated at depths 11741-11945ft, 11933-12173ft, 11658-11847ft and 11926-12095ft across all wells respectively.The average values of gross thickness, volume of shale, effective porosity, total porosity, permeability, water saturation and hydrocarbon saturation of the delineated reservoir sand are 200.5ft for gross thickness, 18% for shale volume, 21% for effective porosity, 26% for total porosity, 1071.74mD for permeability, and 28% for water saturation and 77% for hydrocarbon saturation. Petrophysical evaluation revealed that porosity and permeability are very good to excellent in the field. The reservoir is classed as clean sands based on the high net to gross ratio (>70%) and the low shale volumes (<30%). Consequently, the low value of shale volume, low value water saturation, high value of hydrocarbon saturation and the good porosity and permeability properties of the reservoir of interest suggest economical and commercial quality and viability of the wells within this field.
- Reservoir characterization
- petrophysical evaluation
- fluid identification
- hydrocarbon saturation
How to Cite
Jong SL. Reservoir Properties Determination using fuzzy logic and neural networks from well data in offshore Korea, J. Petroleum Sci. Eng. 2005;49: 182-192.
Ezekwe JN, Filler SL. “Modelling Deepwater Reservoirs,” paper SPE 95066 presented at the 2005 SPE Annual Technical Conference and Exhibition held in Dallas, Texas, U.S.A. 2005;9:12.
Adagunodo TA, Bayowa OG, Alatise OE, Oshonaiye AO, Adewoyin OO , Opadele VO. Characterization of reservoirs and depositional study of J-P field, shallow offshore of Niger Delta Basin, Nigeria. Scientific African. 2022;15:1-10.
Aigbadon GO, Babatunde GO, Aminu MB, Nanfa CA, Christopher SD. Depositional environments and reservoir evaluation of otuma oil field, Niger - Delta basin, Nigeria. European Journal of Environment and Earth Sciences. 2021;2(6):53-57.
Aigbadon GO, Akpunonu, EO, Agunloye SO, Ocheli A, Akakaru, CO. Depositional Environment and facies analysis of Useni-1, Niger Delta Basin, using well logs, core data. International Journal of Advanced Geosciences, 2019;7(1):58-66.
Ogbe OB, Orajaka IP, Osokpor J, Omeru T, Okunuwadje SE. Interaction between sea-level changes and depositional tectonics: implications for hydrocarbon prospectivity in the western coastal swamp depobelt, Niger Delta Basin, Nigeria. AAPG Bull. 2020;104:477–505.
Ogbe OB. Sequence stratigraphic controls on reservoir characterization and architectural analysis: a case study of Tovo field, coastal swamp depobelt, Niger Delta Basin, Nigeria. Mar. Petrol. Geol. 2020; 121:104579.
Anyiam UO, Uzuegbu E. 3D seismic attribute-assisted stratigraphic framework and depositional setting characterization of frontier Miocene to Pliocene aged Agbada Formation reservoirs, deep offshore Niger Delta Basin. Mar. Petrol. Geol. 2020;122: 104636.
Esegbue O, Jones D, Bergen P, Kolonic S. Quantitative diamondoid analysis indicates oil cosourcing from a deep petroleum system onshore Niger Delta Basin. AAPG Bulletin. 2020;104:1231-1259.
Xiao Y, Wang H. A new insight on sedimentary facies of the Miocene to Pliocene Agbada Formation, offshore Niger Delta Basin, Nigeria. Journal of African Earth Sciences. 2023;200:1-14.
The Shell Petroleum Development Company of Nigeria Limited, SPDC. Environmental Impact Assessment of the 20’’x 37 km Kolo Creek-Rumuekpe Trunkline Replacement Project; 2004.
Turtle MLW, Charpentier RR, Brownfield ME. The Niger Delta petroleum system: Niger Delta Province, Nigeria, Cameroun, and Equatorial Guinea, Africa. U.S.G.S. Open file Report. 1999;50–54.
Adeoti LA, Kolade A. Afinotan I. Fluid prediction using AVO analysis and forward modelling of deep reservoirs in Faith field, Niger Delta, Nigeria. Arabian Journal of Geosciences. 2014;8(6):4057–4074.
Momta P. Geobody architecture and petroleum potential of the yowi field, offshore eastern Niger delta, Nigeria. Am. J. Geosci; 2015. Available:https://doi.org/10.3844/ ajgsp2015
Su YS, Zhang GY, Wang T, et al.The gravity-slide tectonics in the Niger Delta. Chin. J. Geol. 2019;54(2):411–422.
Su YS, Chen ZK, Li YJ. The faults and shale tectonics in the southeastern flank of the Niger Delta large scale gravity gliding tectonics. Chin. J. Geol. (Scientia Geologica Sinica). 2020;55(2): 615–625.
Whiteman A. Nigeria: its petroleum geology, resources, and potential: London, Graham, Trotman. 1982;394.
Kulke H. Regional petroleum geology of the world. Part II: Africa, America, Australia and Antarctica. Berlin, Gebrüder Borntraeger. 1995;143-172.
Hosper J. The geology of the Niger Delta Area, in the geology of the East Atlantic continental margin. Great Britain, Institute of Geological Science, Report. 1965;70 (16):121-141.
Kaplan L. Fundamentals of geology. 3-d seismic horizons and inversions. The leading Edge. 1997;15:1090.
Ekweozor CM, Daukoru EM. Petroleum source bed evaluation of tertiary Niger Delta. American Association of Petroleum Geologists Bulletin. 1984;70: 48-55.
Short KC, Stauble AJ. Outline of geology of Niger Delta. Am. Assoc. Petr. Geol. Bull. 1967;51(5):761–779.
Avbovbo AA. Tertiary lithostratigraphy of the Niger Delta. American Association of Petroleum Geologists Bulletin. 1978;62(2): 295-306.
Weber KJ, Daukoru EM. Petroleum geology of the Niger Delta. Ninth World Petroleum Congress. Tokyo. 1975;2:202–221.
Stacher P. Present understanding of the Niger Delta hydrocarbon habitat, in Tuttle; Tertiary Niger Delta, Petroleum System, Niger Delta Province, USGS Open-file report 99-50-H; 1995
Evamy BD, Haremboure J, Knaap P, Molloy FA, Rowlands PH. Hydrocarbon habitat of tertiary Niger Delta. American association of petroleum geologist. Bulletin. 1978;62:1–39.
Doust H, Omatsola E. Niger Delta, in J.D. Edwards, and P.A. Santogrossi, Divergent/passive margin basins: American Association of Petroleum Geologists Memoir. 1990;48:201–238.
Weber KJ, Daukoru EM, Mandl G, Pilaar WF, Lehner F. The role of faults in hydrocarbon migration and trapping in Nigerian growth fault structures: Offshore technology Conference 10, Paper OTC 3356. 1975;2643– 2653.
Reijers TJ. Selected Chapters on Geology. SPDC Corporate Reprographic Service, Warri, Nigeria. 1996;194.
Olayiwola MA., Bamford KM. Depositional environment and reservoir characterization of the deep offshore upper Miocene to early Pliocene Agbada Formation, Niger delta, Nigeria.J. Afr. Earth Sci. 2019; 159:103578.
Asquith G, Gibson D. Basic well log analysis series. 1982;2(3):12-18.
Larionov VV. Borehole radiometry, national electric drag racing association, Moscow, Soviet Union; 1969
Toby D. Well logging and formation evaluation burlington: Gulf Professional Publishing (Elsevier) USA; 2005.
Owolabi OO, Longjohn TF, Aijenka JA. An empirical expression for permeability in unconsolidated sands of the eastern Niger delta.Journal of Petroleum Geology. 1994; 17(1):111-116.
Asquith G, Krygowski D. Basic well log analysis: American association of petroleum geologist. Methods in Exploration. 2004;16:31-35.
Rider MH. Geological interpretation of well logs. Blakie, Glasgow, and London-John Wiley and Sons, New York; 1986.
Adagunodo TA, Sunmonu LA, Adabanija MA. Reservoir characterization and seal integrity of Jemir Field in Niger Delta. Nigeria. J. Afr. Earth Sci. 2017;129:779- 791.
Bayowa OG, Adagunodo TA, Oyedara II. Reservoir classification and petrophysical evaluation of “BAO” Field Niger Delta Petrol Coal. 2019;61(5):1112–1119.
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