Mature field oil production performance based on conventional field development plan(s) dating back to early 1970s and 1980s is challenged by the inability to fully maximize oil recovery over total field life. An enabling application that is being widely considered and implemented to some extent in more recent years to address the challenge above is to pursue enhanced oil recovery (EOR) through optimized completion design. This paper elaborates on several key completion design factors that were evaluated and implemented to enable EOR for two mature fields' offshore Malay basin (Field A and Field B); these key design factors included: Well completion design to maximize zonal production contribution through use of Inflow Control Devices (ICDs) or Interval Control Valves (ICVs) to improve sweep efficiencyFit for purpose well material selection for injectors and oil producers (OP) to last throughout the well lifeOpenhole completion with swell packers and standalone screens to maximize sandface contactApplication of chemical tracer technology to identify water breakthrough for any future zonal isolation plan, zonal contribution estimation and reduce need for wireline intervention to obtain production logging data

No abstract