Abstract
This study presents the log analysis results of a suite of conventional wireline logs including gamma ray, density, neutron, and resistivity from two wells in ‘Ictorian’ Field located in the Niger delta with the aim of evaluating hydrocarbon prospect of the field. Results obtained showed presence of hydrocarbon in eleven (11) reservoirs from well 1, and four (4) reservoirs from well 2. Well 1 and 2 both had hydrocarbon reservoir bearing gas. Well 1 had Gas Water contact at 2497m and 2964m, while well 2 had Gas water Contacts at 1739m and 2510m. Effective porosities had values ranging from 26-16% in well 1. In well 2, effective porosities had values ranging from 22-17%.The values obtained show that the analysed reservoirs have good permeability. The calculated values indicate that porosity, permeability values from the hydrocarbon bearing reservoirs are good enough for commercial accumulation in the Niger Delta. It is recommended that for field optimization mud logging data and core data analysis should be integrated as part of the evaluation exercise.Keywords: Reservoir, petrophysical properties, reservoir quality, wireline logs
Highlights
Formation Evaluation of studied wells: In the present study, the hydrocarbon bearing reservoirs was analysed from the resistivity log
The average porosity was estimated from the neutron density cross plot, the effective porosity was further deduced by introducing the shale volume percentage
Effective porosities were estimated and these effective porosities determine the permeability of the reservoirs
Summary
Formation Evaluation of studied wells: In the present study, the hydrocarbon bearing reservoirs was analysed from the resistivity log. This is the thickness of sand in the reservoir zone irrespective of whether it is clean, its permeability or its fluid saturation. This was done using the gamma ray log to get the sand and shale readings in API estimate the volume of shale in the reservoir as follows: GRlog − GRmin
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