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Home  >  Transactions of NAMP VOL 14

25. PETROPHYSICAL EVALUATION OF Z-WELL IN X-FIELD, NIGER DELTA BASIN, NIGERIA by E. J. Ighodaro1 and M. O. Eruotor Volume 14, (January - March, 2021 Issue)
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PETROPHYSICAL EVALUATION OF Z-WELL IN X-FIELD, NIGER DELTA BASIN, NIGERIA

E. J. Ighodaro1 and M. O. Eruotor2 

1Department of Geology and Petroleum Studies, College of Natural and Applied Sciences, Western Delta University, Oghara, Delta State, NIGERIA.

2Department of Physics with Electronics, College of Natural and Applied Sciences, Western Delta University, Oghara, Delta State, NIGERIA, 

Abstract

Z-well of X-field, Niger Delta Basin was evaluated using log suites including: Gamma Ray (GR)log, Resistivity log and Neutron – Density Cross-plot log to determine the lithology of the formation, hydrocarbon content and the hydrocarbon bearing reservoirs in the well. The Gamma Ray (GR) log was used to identify the lithology of the formation by measuring the natural radioactivity emanating from the formation; with sandstone having low natural radioactivity and shale having high radioactivity emanating from it. The Resistivity (R) log was used to measure the resistivity of the formation, which is the ability of the formation to resist or conduct electric current.  The Neutron – Density crossplot log was used to determine the possible hydrocarbon bearing zones and to ascertain whether it is gas, oil or water. The evaluation gave rise to alternating sandstone and shale lithologies, with reservoir zones of fluid content including twenty five (25) hydrocarbon bearing zones and thirteen (13) water bearing zones. 

Keywords: Petrophysical, Gamma Ray Log, Resistivity Log, Reservoir, Sand, Shale, Niger Delta

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