Publications

Oil displacement experiments with water driven miscible CO2 slug flooding were conducted using core flood apparatus. The objectives of the research were to determine the CO2 slug sizes which correspond to the maximum oil recovery if used for continuous CO2 displacement processes and to study the effect of CO2 slug size variation on oil recovery.The reservoir core model used was a 43 cm length of 5.12 cm diameter cylindrical artificial core with 30% porosity and 1237 mD permeability. The displacement processes were done under a miscible condition for DS-01 oil sample at 2500 psi displacement pressure and 167 0F temperature with 10%, 20%, 30% PV CO2 slug sizes driven by formation water and finally 100% PV or continuous CO2 flooding. The displacement was done horizontally at the rate of displacement in porous media of 3.24 cm/hour and injection continued up to 1.2 PV cumulative fluid injected.Based on the experiment results, we observe that oil recovery at horizontal core displacement for the corresponding CO2 slug sizes are 75.12%, 82.28%, 84.68% and 87.10% of initial oil in place. The optimum CO2 slug size for DS-01 oil sample is 32% PV.