An operator has designed a demonstration project for carbon dioxide (CO2) enhanced oil recovery (EOR) and has implemented it in one of its fields. The main objectives of the demonstration project are estimation of sequestered CO2, determination of incremental oil recovery, and evaluating the risks and uncertainties involved, including migration of CO2 within the reservoir and operational concerns. It is estimated that approximately 40% of the injected CO2 will be sequestered permanently in the reservoir.
Conceptual Road Map and Screening Studies. Given the relatively light nature of crude oils and generally high reservoir pressures in Saudi Arabia, CO2 injection is a viable recovery method, especially in flooded reservoirs. An initial screening highlighted several good candidates for CO2 injection. A mature, waterflooded part of a large oil field with a carbonate reservoir was selected as a candidate for CO2 injection. Further studies were conducted for the candidate reservoir that included laboratory, feasibility, and detailed reservoir-simulation studies. This reservoir has been flooded for decades in a peripheral water-injection mode, and considerable reservoir and production data were available....
First CO2-Enhanced-Oil-Recovery Demonstration Project in Saudi Arabia
01 July 2017