Petrophysics of the B-Reservoir in Eyram Field, Onshore Niger Delta

Abstract

Evaluation of Eyram field reservoir has been undertaken in this work for determination and distribution of petrophysical properties, fluid type and hydrocarbon contact within B-Horizon using log data. Eyram field is located in onshore area of the Niger Delta and it essentially contains oil and gas producing reservoirs. The field consists of the reservoirs of the Agbada Formation, Niger Delta, a succession of alternating deltaic sands and shale layers. Well log data from 21 wells of the field were studied to characterize the porosity, permeability and water saturation of the B-reservoir. The logs were environmentally corrected and normalized, volume of shale, permeability and porosities were calculated, water saturation were determined by Archie’s equation and dual water model, and net pay was calculated. Within the B-reservoir of the Eyram field, the average well has 103.94ft of net sandstone, having average porosity of 26%. Shale volume ranges from 2% to 31% with an average of 21%.The average permeability is 399mD, average water saturation is 48% while average hydrocarbon saturation is 52%. Porosity and permeability in the field is high on the average due to very good to excellent sand quality.