EVALUATION OF THE PERFORMANCE OF WATER FLOODING IN A VERTICALLY STRATIFIED RESERVOIR.

ABSTRACT

In the context of oil reservoirs, water injection has been regarded as a natural progression following primary production, as a means of recovering additional oil from reservoirs whose oil production rate has declined to very low levels.. Consequently, waterflooding has emerged as a widely adopted practice in oil reservoirs, with the primary goal of increasing oil recovery. The success of enhanced oil recovery techniques is intricately linked to a profound understanding of reservoir characterization. Multi-layered oil reservoirs exhibit quite significant heterogeneity thereby posing unique challenges in accurate reservoir characterization. Therefore, comprehensive studies and predicting the performance of EOR techniques intended for such a reservoir system are key to aiding management decisions in the best available option for optimization or possibly averting the loss of substantial capital investment. This study seeks to unravel key insights that underpin the success of chemical flooding strategies in multi-layered reservoirs. Finite difference formulations are used in providing solutions to flow equations in a uniform reservoir of 2 significantly different layers. Presenting our reservoir in 3D, we assign ky1= ky2=ky3, whereas there is a major variation in kx1,kx2,kx3. The solutions are provided using a program written on Matrix Laboratory Application. The stability of our solutions is analyzed and results are discussed.