Formation Evaluation of ‘J Field’, Niger Delta Using Well Log Data

Abstract

Wireline logs from three (3) wells, 1, 2 and 3 were used to quantitatively evaluate the ‘J field’ of the Niger Delta area. The wells had been evaluated using a combination of Gamma-ray log, Resistivity logs and Neutron – Density logs. Wireline log analysis was used in the reservoir evaluation of the ‘J field’; the hydrocarbon sands were delineated by the use of gamma ray, resistivity and density/neutron from which the reservoir prospectivity were determined. Well 1 has 4 reservoirs, well 2 has 4 reservoirs and well 3 has 4 reservoirs, the reservoirs are namely

(A, B, C, D) .This investigation helps to identify the lithologies and recognize the hydrocarbon bearing intervals as – well as to quantify the amount/type of hydrocarbon in the reservoirs contained in wells 1, 2, 3) for further exploration and exploitation in the ‘J field’ of the Niger Delta. The petrophysical properties of the reservoirs analyzed include: water saturation for wells 1, 2 and 3 ranging from (0.13– 0.26) %, (0.16 – 0.37) % and (0 – 0.41) %, porosity values; (18 –23) %, (14 – 20) % and (18 – 23) %, hydrocarbon saturation for the wells are; (0.74 – 0.86) %, (0.63 – 0.84) % and (0 – 0.59) % respectively. The net pay thickness for well 1 is 39.88 metres, well 2 is 53.4 metres and well 3 is 53.9 metres. The analysis of the wells depict the presence of hydrocarbons in well 1 and well 2, with only one reservoir (D) in well 3 indicating the presence of hydrocarbon.

Keywords: (Hydrocarbon, Well logs, Reservoir and Volumetric Analysis)

DOI: 10.7176/JEES/10-2-05

Publication date: February 29^th 2020