Maximizing Recovery from Marginal Reservoirs: A Full Cycle Development Approach Leveraging Best in Class Integrated Reservoir Management Practices

The field is an under saturated marginal oil reservoir with significant oil in place and has been producing since 2014. It has undergone an accelerated transition from green to brownfield with a notable increase in recovery factor (3%), while facing challenges such as pressure depletion and a high number of inactive strings. This paper presents the application of integrated reservoir management practices, focusing on reservoir health, dynamic monitoring, collaborative decision making, opportunity generation, target delivery, and digital dashboards to efficiently manage field maturation and enhance recovery across the The methodology applied a dynamic synthesis approach leveraging integrated reservoir management (IRM) workflows to assess field challenges and develop targeted solutions. This included field performance reviews, sector level dynamic synthesis, and well level analysis. Key efforts focused on production optimization, recovery factor improvement by sector, and production injection rebalancing. Reservoir monitoring ensured compliance with pressure coverage and saturation logging guidelines, addressing challenges in deep oil bearing zones with limited vertical wells. Mitigations involved logging while tripping LWT deployment during well interventions. Opportunity generation, value of information analysis, and IRM dashboard implementation enabled integrated, data driven reservoir management. The implementation of integrated reservoir management practices has led to significant improvements in field performance and reservoir health. Full alignment with the production mandate was achieved, delivering sustained output with a 30% recovery factor realized up to date. Water cut has been effectively maintained below 30%, and gas oil ratio (GOR) stability has been ensured. Reservoir pressure recovery has supported extended natural flow potential, enabled by optimized lower completion strategies and the implementation of hybrid artificial lift solutions. A notable reduction in inactive strings contributed to enhanced production efficiency and asset value. Dynamic synthesis and opportunity focused workflows facilitated the recovery of performance in previously underperforming areas, supporting full system optimization and production resilience. Reservoir health management achievements include full compliance with volumetric replacement ratio (VRR) targets and consistent delivery of recovery expectations. Through rigorous surveillance, targeted interventions, and digital integration via an IRM dashboard, the field successfully met both short term production assurance and long term technical rate targets. These results demonstrate the effectiveness of structured reservoir management workflows in overcoming marginal field challenges, maximizing resource recovery, and sustaining production throughout the maturation cycle. The utilization of best reservoir management practices optimized recovery, minimized well inactivity, and enabled proactive decision making with digital tools, driving significant value and ensuring sustained field performance.