The gathering and processing technology for CO₂ flooding produced fluid is a key issue closely related to the technical feasibility for recovery enhancement by CO₂. An optimization and transformation program for ground engineering for CO₂ flooding pilot test in Yaoxi block of Yaoyintai oilfield has been developed based on analysis of properties of the produced fluid and associated gas, adaptability for the gathering system, existing system improvement and processing for associated gas. This paper suggested that to minimize engineering investment and improve economic benefit of the project, it is a priority to analyze the adaptability of existing systems and access the feasibility using existing facilities in CO₂ flooding pilot test at existing oilfields.

CO₂ flooding  /  produced fluid  /  oil-water mixed transfer  /  Yaoxi block