Revolutionizing Production in High CO2 and High GOR Fields, Paving the Way to a Low Carbon World

Abstract The Subsea High-Pressure Separation, in this paper named as SHPS, is an innovative subsea separation technology designed to separate gas with high-CO2 content from the reservoir-produced fluid at the seabed. This technology operates under high-pressure conditions and utilizes centrifugal pumps to directly reinject the separated gas stream back into the reservoir. By removing the excess of gas with high CO2 content, the SHPS technology enables efficient separation and contributes to emissions intensity reduction, making it a promising system for carbon capture. The primary objective of the SHPS is to debottleneck the topside gas processing plant and extend the oil production plateau by reducing the Gas-Oil Ratio (GOR) of the oil stream that reaches the FPSO (Floating, Production, Storage and Offloading) facility. Additionally, the technology addresses challenges posed by high GOR, CO2 content, and productivity index (PI) in ultra-deep water offshore reservoirs, particularly in the Brazilian Pre-salt. This paper provides an overview of the rigorous qualification program developed for the SHPS technology, in accordance with API 17N and 17Q standards. The technological roadmap includes successful completion of experimental tests, early engagement with subsea companies, and a de-risking phase focused on pump design and testes with dense gas as well as dynamic simulations. The remaining phases involve the construction, integration, installation, and operational testing of the SHPS system in the challenging Pre-salt environment, ultimately leading to its qualification as a transformative innovation. Throughout the development of the SHPS, valuable insights have been gained, emphasizing the importance of a clear vision, engaged multidisciplinary project team, market validation, prototyping, testing, risk mitigation, scalability, and adaptability. In conclusion, the SHPS technology offers significant potential for enhancing offshore oil and gas operations. By effectively separating and reinjecting high CO2 content gas into the reservoir, SHPS optimizes production, reduces emissions intensity, and contributes to environmental sustainability. Its integration with carbon capture capabilities adds further value, making it a valuable asset in the industry’s pursuit of cleaner and more sustainable energy production. The collaboration with key players and adherence to industry standards position SHPS as a game-changer in revolutionizing oil and gas production in challenging offshore environments. Overall, SHPS represents a promising solution for the industry, addressing key challenges and contributing to a low-carbon future.