Petrophysical Analysis of Reservoirs in Well-Y, Coastal Swamp Depobelt, Niger Delta Basin, Nigeria

Abstract

The present study presents the interpretation of well log data obtained from a well-Y drilled on the coastal swamp depobelt of Niger Delta Basin, Nigeria. The petrophysical analysis of the well-Y identified four (4) hydrocarbon-bearing reservoirs namely RES-A, RES-C, RES-D, and RES-E. The net sand thickness of the identified reservoirs varies from 12.69ft in RES-D sand to 103.45ft in RES-E sand. The effective porosity values of the reservoirs range from 0.18 in RES-D to 0.2 in RES-A and RES-C reservoirs, while NTG values range from 0.51 in RES-D to 1.0 in RES-A and RES-C reservoirs. The values of water saturation computed range from 22% in RES-E to 80% in RES-C sand. The porosities of the identified reservoir sands are very good for hydrocarbon production, also the reservoirs have good to very good permeability values. The water saturation values of RES-III and RES-IV are 25% and 22% respectively, which indicate high hydrocarbon saturation. The generated petrophysical parameters from the well log data analyses indicate that reservoir RES-IV is the thickest, and has the highest hydrocarbon saturation. Reservoirs RES-D and RES-E would be more prolific than others because of their thicknesses and saturation of hydrocarbon.