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Experimental Study of Oil Displacement and Gas Channeling during CO 2 Flooding in Ultra—Low Permeability Oil Reservoir

Author

Listed:
  • Feng Liu

    (School of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China)

  • Ping Yue

    (State Key Laboratory of Reservoir Geology and Development, Southwest Petroleum University, Chengdu 610500, China)

  • Qingli Wang

    (Changqing Oilfield Company, Petro China, Xi’an 710018, China)

  • Gaoming Yu

    (Changqing Oilfield Company, Petro China, Xi’an 710018, China)

  • Jiangtang Zhou

    (Changqing Oilfield Company, Petro China, Xi’an 710018, China)

  • Xiukun Wang

    (Institute of Unconventional Oil and Gas Science and Technology, China University of Petroleum (Beijing), Beijing 102249, China)

  • Quantang Fang

    (State Key Laboratory of Reservoir Geology and Development, Southwest Petroleum University, Chengdu 610500, China)

  • Xinxin Li

    (Changqing Engineering Design Co., Ltd., Petro China, Xi’an 710018, China)

Abstract

Aiming to solve the problems of poor CO 2 displacement efficiency and serious gas-channeling and low well-opening rates in ultra-low permeability reservoirs, we carry out CO 2 displacement experiments under different permeability reservoirs by using different development methods, water drive to gas drive procedures, and different fracture positions to clarify the effects of physical formation properties, injection methods, and fracture parameters on CO 2 displacement efficiency in C8 ultra-low permeability reservoirs. The experimental results show that the recovery degree of CO 2 miscible drive increases with an increase in permeability. When the gas–oil ratio is greater than 2000 m 3 /m 3 , serious gas channeling can be observed in both the miscible drive and immiscible drive. In addition, when the water drive is altered to be a gas drive, the water cut of 0.45 mD and 0.98 mD cores decreased, and the recovery degree increased by 13.4% and 16.57%, respectively. A long fracture length will deteriorate gas channeling and lower the CO 2 oil-displacement efficiency. However, the fracture location is found to have little impact on the recovery of CO 2 displacement.

Suggested Citation

  • Feng Liu & Ping Yue & Qingli Wang & Gaoming Yu & Jiangtang Zhou & Xiukun Wang & Quantang Fang & Xinxin Li, 2022. "Experimental Study of Oil Displacement and Gas Channeling during CO 2 Flooding in Ultra—Low Permeability Oil Reservoir," Energies, MDPI, vol. 15(14), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5119-:d:862305
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    Citations

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    Cited by:

    1. Wen Li & Hongwei Yu & Zhengming Yang & Jinlong Li & Xinliang Chen & Longfei Ma, 2022. "Experimental Study on the Sweep Law of CO 2 Miscible Flooding in Heterogeneous Reservoir in Jilin," Energies, MDPI, vol. 15(15), pages 1-14, August.
    2. Haishui Han & Xinglong Chen & Zemin Ji & Junshi Li & Weifeng Lv & Qun Zhang & Ming Gao & Hao Kang, 2022. "Experimental Characterization of Oil/Gas Interface Self-Adjustment in CO 2 -Assisted Gravity Drainage for Reverse Rhythm Reservoir," Energies, MDPI, vol. 15(16), pages 1-16, August.

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