Reservoir Characterization for Co2 Sequestration and Co2-Enhanced Oil Recovery Techniques in Maje Field, Offshore Niger-Delta, Nigeria.

Abstract

ABSTRACT The oil and gas industry is a significant contributor to carbon dioxide (CO2) emissions, which have a major impact on climate change. Geoscientists in the industry play a crucial role in mitigating climate change by identifying and evaluating potential CO2 storage sites, monitoring CO2 behavior after injection, and exploring CO2 enhanced oil recovery (EOR) techniques. CO2 -EOR involves injecting CO2 into depleted oil reservoirs to increase oil production. Reservoir characterization using well log and seismic data analysis helps determine storage capacity, containment, and injectivity of reservoirs for CO2 sequestration and EOR. In this study, two sand reservoirs (RES 1 and RES 2) were analyzed, with RES 2 being considered more suitable for CO2 sequestration and CO2 -EOR. The estimated storage capacity of the study area was approximately 40 million metric tons (MT). Assessments of fault sealing capacity and reservoir properties were conducted to validate storage potential. Further investigations and analysis by experts in different fields are necessary. The interpretation of seismic and well log data aids in generating geological and structural models, which provide necessary information for designing injection and production wells and analyzing the compatibility of CO2 -EOR techniques with the reservoir. Direct Air Capture and Rejection (DACR) technology is also highlighted as a beneficial carbon capture solution for developing countries like Nigeria, as it can help reduce carbon emissions from oil and gas operations while enhancing oil recovery in characterized reservoirs.