Abstract
Abstract Identification of an optimal field development plan is one of the most critical decisions for oil asset management. In the new norm of low oil prices, this assumes even more relevance for mature oilfields to maximize overall recovery. In greenfield developments and oilfields in early production life, the absence of a clear roadmap detailing their future development strategy can often lead to missed opportunities and sub-optimal recovery. To bridge this gap, Petroliam Nasional Berhad (PETRONAS) began identifying new improved oil recovery (IOR) opportunities in mature fields and started formulating an optimal development plan in greenfields. In 2019, PETRONAS embarked on implementing the Reservoir Performance Benchmarking (RPB) tool to evaluate reservoir recovery potential with waterflood. This paper will detail the Phase-II development of this data-analytics based tool which focuses on delivering a comprehensive roadmap, which includes other recovery mechanisms such as gas injection and reservoir under primary recovery. Phase-I of RPB tool (SPE-196443) had considered water injection as a key secondary recovery process to evaluate the benchmark recovery factor for an oil reservoir. As part of Phase-II development, this has been further enhanced to evaluate field recovery potential and provide the benchmark recovery factor for primary recovery and gas injection processes. For fields under primary recovery, a comparative assessment between volumetric depletion and varying aquifer/gas-cap drive is conducted to ascertain the recovery potential. Assessment for incremental secondary recovery gains considers both gas injection and water injection scenarios in the enhanced benchmarking methodology. In addition, the benchmarking calibration methodology has also focused on incorporating additional reservoir parameters specific to each of the recovery processes for overall estimation of the benchmark value. The benchmarking tool also identifies analogue reservoirs to enable replication of best development practices and optimization of the development strategy. With the deployment of this enhanced RPB tool, a comprehensive 5-year roadmap has been developed to improve Malaysian oilfields recovery. This has enabled PETRONAS to augment its resource funnel inventory, streamline its opportunity ranking and integrate project maturation tracking with existing digital platforms of its entire portfolio. This is a novel benchmarking tool to assess reservoir potential recovery factor for primary and secondary recovery processes (both water and gas injection) along with analogue identification for replication of best development practices
Published Version
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