• 2020-03-10
• Akinmoye, O., Ayuk, M.A.
• Volume 1, Issue 2

Abstract

A suite of wireline logs from three wells was utilized for lithology and reservoir quality evaluation in a field in Niger Delta. Lithology interpretation was done using gamma ray and resistivity logs responses. Also, well log correlation was achieved from similarity of log signatures across reservoir and non-reservoir zones. Petrophysical properties of the reservoir rocks were carried out using standard equations. The general stratigraphy is alternation of sand and shale layers which is typical of Niger delta. The sands are dirty and characterized by shale intercalations. The reservoir sands in all the wells are located at the depth interval of 8326 ft to 10596 ft. Three fluid types were identified namely gas, oil and water. Gas-water contact (GWC) occurs at the depth of 8322 ft and 9176 ft for well 1 and well 2 respectively for reservoir R1. The gas-oil contact and the oil-water contact occur at depth 9860 ft and 9911 ft respectively for R3. Computation of reservoir parameters such as net to gross, volume of shale, porosity and hydrocarbon saturation was done using standard equations. The reservoir properties have average effective porosity of 28, volume of shale of 12, net to gross sand 78, hydrocarbon saturation 66 and permeability 21. The petrophysical properties shows that all the reservoirs are of good quality and can be of commercial quantity.

Download PDF