Petrophysical Analysis of XYZ Field, South-East, Niger Delta Using Well Logs
Harry A. Thomas
Akwa Ibom State University
Nsikan J. Etukudo
Tejumade A. Owoeye


Petrophysical, Wireline, Exploration, Reservoirs, Hydrocarbons, Petrel Software


The Niger Delta is a prolific oil province within the West African subcontinent. Exploration activities have been concentrated in the onshore part of this basin but as the delta becomes better understood exploration influences are gradually being shifted to the offshore. This study essentially helps understand the physical properties of the reservoir units of the XYZ field in Niger Delta Basin. PETREL Software and suites of seven geophysical well log data and pressure data obtained from an active oil company in Nigeria, recorded at various locations within the XYZ field, Niger Delta basin was used for this work. The petrophysical analysis was carried out on seven wells using geophysical wireline logs and pressure data to evaluate the reservoir potentials of the XYZ field in the south east Niger Delta. The main petrophysical parameters include; estimation of volume of shale, net to gross, porosity, fluid identification, water saturation and net pay thickness. The Wireline logs employed in this work include Gamma Ray, Density, Neutron log and Resistivity log. Two reservoirs designated P0.5 and P1 were delineated and correlated across wells in the field using the gamma ray logs and resistivity logs. The following procedures were followed for the data analysis; Well data import, Well Normalization, well log Analysis and correlation, Identification of reservoirs, differentiation of hydrocarbon and non-hydrocarbon bearing zones and Petrophysical Analysis. The analysis revealed that the reservoir sand bodies have good reservoir characteristics as shown by their petrophysical properties with an average porosity ranging from 0.30-0.36, average water saturation ranging from 0.08-0.3. The net/gross of the reservoirs is between 0.06-0.6. Wells B1, A5X, A4X, A8X(P0.5) reservoir are oil and gas bearing, well A4X(P1) reservoir is gas bearing, well A8X(P1) reservoir is oil bearing and well B1(P1) reservoir is a wet sand. The petrophysical properties of reservoirs in XYZ field suggest a good reservoir quality which is satisfactory for further exploration and production.



Adeoye, T.O., Enikanselu, P., 2009. Reservoir mapping and volumetric analysis using Seismic and Well Data. Ozean Journal of Applied Sciences 2 (4), 66-67.

Adewoye, O., Amigun, J.O., Okwoli, E., Cyril, A.G., 2013. Petrophysical and structural analysis of Maiti Field, Niger Delta, using well logs and 3-D seismic data. Petroleum & Coa l4 (55), 302-310.

Avbovbo, A.A., 1978. Tertiary lithostratigraphy of Niger Delta: American Association of Petroleum Geologists Bulletin 62, 295- 300.

Corredor, F., Shaw, J.H., Bilotti, F., 2005. Structural styles in the deep-water fold and thrust belts of the Niger Delta. American Association of Petroleum Geologists Bulletin (AAPG) 89 (6), 753-780.

Doust, H., Omatsola, E. 1990. Niger Delta, in Divergent/passive Margin Basins, Edwards J.D. and Santogrossi P.A. eds., AAPG Memoir 48: Tulsa, American Association of Petroleum Geologists, 239-248.

Evamy, B.D., Haremboure, J., Kamerling, P., Knaap, W.A., Molloy, F.A., Rowlands, P.H., 1978. Hydrocarbon habitat of Tertiary Niger Delta. American Association of Petroleum Geologists Bulletin 62, 277-298.

Harry, T.A., Etuk, S.E., Inyang N., Austin, O., 2018. Geomechanical evaluation of reservoirs in the coastal swamp, Niger delta region of Nigeria. International Journal of Advanced Geosciences 6 (2), 165-172.

Harry, T.A., Akata, N., 2019a. Reservoir Geological Study of Etema Field, SE Niger Delta, Nigeria. International Journal of Science and Research 10 (12), 1169-1177.

Harry, T.A., Akata, N., 2019b. Evaluation of Shale Volume and Effective Porosity from Wire Line Logs in 'Watty' Field, Niger Delta, Nigeria; International Journal of Science and Research 10 (12), 1150-1157.

Nwachukwu, J.I., Oluwole, A.F., Asubiojo, O.I., Filby, R.H., McGrimm, C.A., Fitzgerald, S., 1995. A geochemical evaluation of Niger Delta crude oils, in, Oti, M.N., & Postma, G., Ends., Geology of Deltas: Rotterdam, A.A. Balkema, 287-300.

Rider. M., 1986. The Geological Interpretation of Well Logs. Blackie, Glasgow, 151-165.

Schlumberger, 1985. Well Evaluation Conference Nigeria. Schlumberger International, Houston, Texas, 15-153.

Short, K.C., Stäuble, A.J., 1965. Outline of geology of Niger Delta. American Association of Petroleum Geologists Bulletin 51, 761-779.

Stacher, P., 1995. Present understanding of the Niger Delta hydrocarbon habitat in, Oti, M.N., & Postma, G., Eds., Geology of Deltas: Rotterdam, A.A. Balkema, 257-267.
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