Abstract

Author:
Olufemi E., Oyanameh, Michael A., Ayuk, Tokunbo S., Fagbemigun, Wasiu O. Osisanya, Believe B., Onoghoro

Doi: 10.26480/gsrj.01.2024.06.13

This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

The oil and gas industry is continuously evolving, with a growing emphasis on digital transformation to enhance exploration and production processes. This paper presents a detailed study on the digitization of well correlation and petrophysical analysis in the “Okpella” Field, located in the prolific Niger Delta basin. The Okpella Field represents a significant hydrocarbon reservoir with complex geological and petrophysical characteristics, making it an ideal case study for the implementation of advanced digitization techniques. This research presents the results of log suit analysis from the “OKPELLA” field, Niger Delta. The study aimed at locating the hydrocarbon potential of lithological units encountered during the drilling of the “OKPELLA” field. The primary objectives of this research are to improve well correlation accuracy, optimize reservoir characterization, and enhance reservoir management in the Okpella Field. To achieve the general objective, suites of wire-line logs from the “OKPELLA” field were used for the research. Based on wire-line logs, two types of lithology were identified, which include sand and shale. Five sand bodies are marked as reservoirs, and they are denoted as R1, R2, R3, R4, and R5. The sand bodies were identified with their tops and bases at a depth interval of 4880 m to 6050 m. Computed petrophysical parameters for the five reservoir zones gave an average total porosity of 8% to 28%, with low permeability in the range of 0.56 D to 0.95 D. The high permeability indicates that the reservoir sand bodies are permeable. The fluid type defined in the reservoir zones is hydrocarbon, with a high saturation greater than 75%, which indicates that the proportion of void space occupied by hydrocarbon is high, consequently low water saturation and production. Summarily, the good porosity, high permeability, and low water saturation obtained via petrophysical analysis of the “OKPELLA” field indicate that the quality of hydrocarbon within the five (5) reservoirs found in the field of study is prolific and of commercial use.