Enhance Tight Oil Reservoir Recovery Based on Co₂-Water Flooding as Environmentally Friendly Method: Case Study

Abstract

In most cases, a tight oil reservoir is characterized by a high capillary pressure, a complex interaction between oil and water, and the absence of a consistent Oil-Water Contact (OWC) or pressure distribution. It is possible that the incorporation of carbon dioxide would be significant due to the fact that it has the capability of reducing the viscosity of crude oil following the injection of CO2 and increasing the sweep efficiency in porous media. Waterflood recovery, on the other hand, has emerged as the preeminent form of oil recovery due to a number of technological and economic factors. This approach is responsible for the vast majority of the oil that is produced around the world. Some of the potential challenges that may be ascribed to water injection include fluid incompatibility, reservoir heterogeneity, early breakthrough through thief zones, permeability deterioration caused by particles in suspension, and clay swelling. These are only some of the potential hurdles. The development of the Sa’di reservoir in the Halfaya oilfield was investigated in this study. The assumption that the reservoir is comprised of four wells provided the basis for the investigation. The Sa’di-B reservoir research has as its major purpose the prediction of future reservoir performance depending on a variety of production scenarios, as well as the selection of the reservoir development strategy that is both the most efficient and the most environmentally friendly. As a consequence of the findings, oil production starts to gradually decrease after five years of production, which is accompanied by an increase in water cut. This is because the reservoir is a type of tight reservoir, and the OWC starts to climb over its normal level. In order to solve this issue, it is recommended that the perforation locations be moved away from OWC. As a result, it is possible to reach the conclusion that the method of increasing crude oil production through the use of carbon dioxide flooding and water re-injection is among the most environmentally benign approaches.