Special Oil & Gas Reservoirs ›› 2021, Vol. 28 ›› Issue (6): 1-10.DOI: 10.3969/j.issn.1006-6535.2021.06.001

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Advances in the Application of CO2 Stimulation Technology

Zhang Yihe1, Sheng Jiaping1,2, Li Qingxia3, Song Ping3, Chen Yukun3, Qin Jianhua3   

  1. 1. Unconventional Oil and Gas Science and Technology Institute, China University of Petroleum (Beijing), Beijing 102249, China;
    2. Bob L. Herd Department of Petroleum Engineering, Texas Tech University, Lubbock TX 43111, USA;
    3. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China
  • Received:2020-11-30 Revised:2021-09-16 Online:2021-12-25 Published:2022-02-16

Abstract: CO2 stimulation technology is effective in enhanced oil recovery conventional and unconventional oil reservoirs. The advances in the application of CO2 stimulation technology was summarized from in-house laboratory investigation to application and practice in key fields, and the field tests with different technical routes were reviewed and analyzed. The application results indicated that with wide application range in different oil products and different reservoirs, CO2 stimulation technology achieved good results in the mines at home and abroad. The reservoirs will be developed with the technologies of CO2 composite stimulation, CO2 synergistic stimulation, and supercritical CO2 stimulation and nanoparticle-assisted CO2 stimulation in the future. Supercritical CO2 stimulation and nanoparticle-assisted CO2 stimulation are still under the laboratory experiment. Their practicability should be further studied and verified by field application. In the context of achieving the target of carbon neutralization by 2060, the application scale of CO2 stimulation technology will be further expanded. This study will also provide technical support for the promotion and application of CO2 stimulation technology.

Key words: CO2 huff and puff, composite huff and puff, synergistic huff and puff, enhanced oil recovery, CCUS

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