Qian Weiming, Cao Liyuan, Hu Wendong, et al. Present situation and further research direction of CO2 flooding injection-production technology and in China[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(3): 66-72.
Qian Weiming, Cao Liyuan, Hu Wendong, et al. Present situation and further research direction of CO2 flooding injection-production technology and in China[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(3): 66-72. DOI: 10.13809/j.cnki.cn32-1825/te.2019.03.013.
the research process and development situation of completion string of CO
2
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 CO
2
flooding injection-production well. The pilot test of CO
2
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 CO
2
corrosion in
hibitor 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 CO
2
flooding injection and production technology was pointed out.