en.Wedoany.com Reported - On April 11, Wedoany learned from CNOOC that China's first offshore carbon capture, utilization, and storage (CCUS) technology demonstration project for enhanced gas recovery—the Dongfang 1-1 Gas Field CCUS Project—has officially begun construction. Upon full operation, it is projected to sequester over one million tons of carbon dioxide annually in subsea formations.

The full name of the carbon injection for enhanced gas recovery technology is Carbon Dioxide Enhanced Gas Recovery (CO2-EGR). This technology "turns waste into treasure" by capturing and purifying the carbon dioxide produced during natural gas extraction. The captured CO2 is then pressurized and re-injected into gas-bearing formations. This process not only achieves sequestration but also serves as a driving force to extract otherwise difficult-to-recover natural gas.

The newly launched offshore CCUS demonstration project plans to construct two new jacket platforms and lay a subsea pipeline, which will connect to the existing production facilities of the Dongfang 1-1 Gas Field.

Yu Fasong, Offshore Carbon Injection for Enhanced Gas Recovery Project Manager, CNOOC Hainan Company: Relying on this new project, we will relocate the decarbonization processing segment, originally planned for an onshore treatment plant, to the offshore platform, achieving "source carbon reduction" for offshore natural gas extraction. Compared to traditional processes, the decarbonization technology adopted in this project offers advantages such as high equipment integration, low energy consumption, and higher recovery of hydrocarbon components.

The Dongfang 1-1 Gas Field is China's first independently developed offshore gas field and also the first offshore carbon-rich gas field developed in China. Since its completion and commissioning in 2003, it has cumulatively produced over 50 billion cubic meters of natural gas.

Yu Fasong, Offshore Carbon Injection for Enhanced Gas Recovery Project Manager, CNOOC Hainan Company: Upon the project's full operation, it is expected to inject up to approximately 1.2 million tons of carbon dioxide into the formation annually. This is of significant importance for enhancing marine energy and resource development capabilities and supporting the nation's "dual carbon" goals.

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