Enhancing Oil and Gas Recovery: The Strategic Implementation of the Field Z Gas Cap Blow Down (GCBD) Project for Sustained Production and EOR Support

Abstract The Field Z Gas Cap Blow Down (GCBD) project focuses on boosting oil production and securing a reliable gas supply for Field A's Enhanced Oil Recovery (EOR). By optimizing gas cap utilization with targeted well interventions—such as plug setting, perforation addition, and advanced sand control—the project ensures consistent gas injection rates and long-term field stability. This paper outlines field performance, process efficiency, and anticipated results, providing a comprehensive blueprint for sustainable production enhancement. The Field Z Gas Cap Blow Down (GCBD) project utilizes a structured approach to optimize gas cap utilization and support Field A's Enhanced Oil Recovery (EOR). The strategy includes well-specific interventions on Z-B01, Z-B02, and Z-B11, such as setting plugs for zonal isolation, adding perforations to enhance gas flow, and installing Erosion Resistant Thru-Tubing Sand Screens (ER-TTSS) for effective sand control. A thorough process adequacy analysis ensures the alignment of surface facilities with project objectives. These initiatives work in tandem to optimize gas production, maintain injection rates, and maximize oil recovery. The Field Z Gas Cap Blow Down (GCBD) project has yielded remarkable results, proving its effectiveness in optimizing resource utilization and supporting Field A's Enhanced Oil Recovery (EOR). Targeted interventions on wells Z-B01, Z-B02, and Z-B11 led to an immediate gas production increase of 18 MMscf/d, adding 24 Bscf in reserves and contributing an estimated 2.2 MMstb in additional oil recovery. Key accomplishments include successful zonal isolation, enhanced gas mobility through perforations, and sustained well integrity with Erosion Resistant Thru-Tubing Sand Screens (ER-TTSS), which addressed sand production challenges. The project also met infrastructure adequacy standards, ensuring alignment with the gas compressor's Turn Down Rate (TDR) of 21 MMscfd through 2029, ensuring stable gas injection for Field A. These efforts optimized gas cap productivity while prolonging field life and boosting profitability. In conclusion, the GCBD project represents a strategic approach to resource management, delivering significant gains in production, reservoir health, and operational sustainability. It highlights the value of innovative methods and thorough planning in advancing production enhancement strategies, setting a benchmark for similar projects in gas cap utilization and EOR support. This paper presents innovative methodologies for maximizing gas cap utilization through zonal isolation, perforation optimization, and Erosion Resistant Thru-Tubing Sand Screens (ER-TTSS). It includes a thorough process adequacy analysis designed for non-routine operations, providing valuable insights into addressing high-stress production challenges. Engineers will gain from detailed case studies, technological advancements, and risk mitigation strategies, offering practical, field-tested solutions to enhance reservoir performance and ensure sustainable resource management over the long term.