Reservoir Evaluation and Development ›› 2019, Vol. 9 ›› Issue (3): 66-72.

• Technology • Previous Articles     Next Articles

Present situation and further research direction of CO2 flooding injection-production technology and in China

Qian Weiming,Cao Liyuan,Hu Wendong,Zhang Jinhuan,Zhang Luman,Han Chao   

  1. Taizhou Oil Production Plant, East China Oil and Gas Company, SINOPEC, Taizhou, Jiangsu 225300, China
  • Received:2019-01-15 Online:2019-06-26 Published:2019-07-02


In view of the technical difficulties of CO2 flooding completion string, the research process and development situation of completion string of CO2 flooding injection-production well were systematically expounded. It was concluded that the sealing performance of the completion string of injection well and anti corrosion and gas proof performance of production well were the key technologies for the normal production of CO2 flooding injection-production well. The pilot test of CO2 flooding in domestic oilfield showed that the continuous optimization of packer and the gas tightness detection of tubing contributed to improve sealing of injection wells, and the technologies like CO2 corrosion inhibitor formulation, injection strengthening, tube controlling by gas lifting, downhole oil and gas separation were helpful to improve the pumping efficiency of the production wells. Meanwhile, in view of the technical problems faced by the injection and production wells on site, the further research direction of production by CO2 flooding injection and production technology was pointed out.

Key words: CO2 flooding, air tightness, anti corrosion and gas, matching technology

CLC Number: 

  • TE357