BLACK OIL RESERVOIR

This study investigates how optimising injection parameters can improve oil recovery performance in black oil reservoirs using enhanced oil recovery (EOR) techniques. Using CMG's IMEX and STARS simulators, this research examined the influence of injection rate and pressure variations on reservoir recovery efficiency. Three EOR techniques were examined: waterflooding, polymer flooding, and steam injection. Multiple simulation scenarios were conducted on a three-dimensional reservoir model to determine the optimal parameter combinations for maximising oil production. Analysis revealed that injection rate and pressure significantly influenced overall recovery efficiency. While waterflooding outperformed primary depletion methods, polymer flooding yielded the best results in terms of recovery factor and total oil produced, primarily by enhancing sweep efficiency and minimising water production. Steam injection improved recovery by reducing oil viscosity via heat transfer, though it ranked second to polymer flooding under the modeled conditions. Based on the simulation results, polymer flooding emerged as the most effective method for the studied reservoir conditions, indicating strong applicability for Niger Delta black oil reservoirs.