Reservoir Evaluation and Development ›› 2019, Vol. 9 ›› Issue (3): 41-46.

• Field Application • Previous Articles     Next Articles

Technology and application of CO2 flooding in ultra-low permeability beach-bar sand reservoir

Cao Xulong,Lyu Guangzhong,Wang Jie,Zhang Dong   

  1. Shengli Oilfield Company, SINOPEC, Dongying, Shandong 257015, China
  • Received:2018-12-21 Online:2019-06-26 Published:2019-07-02


To solve the problems of difficult miscibility and low sweep coefficient in CO2 flooding of ultra-low permeability beach-bar sand reservoir, theories and methods such as geology, seepage mechanics and reservoir engineering and by the combined methods of physical modeling and mathematical simulation are used to formulate the evaluation standard of CO2 flooding, clarify the EOR mechanism of CO2 flooding, form the optimum design technique adapted for the well pattern of CO2 flooding, and optimize the policy limitation of CO2 flooding in the demonstration zone Gao 89-1 block. It is indicated that the technology has been applied effectively. Up to now, over 2.8×10 5 t of CO2 have successfully been injected into the reservoir, and the cumulative oil increment is 6.5×10 4 t, and 2.6×10 5 t of CO2 have been stored in CO2 flooding and storage demonstration zone.

Key words: ultra-low permeability, CO2 flooding, CO2 emissions, optimal design, enhance oil recovery

CLC Number: 

  • TE357