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Simulation Study of Allied In-Situ Injection and Production for Enhancing Shale Oil Recovery and CO 2 Emission Control

Author

Listed:
  • Haiyang Yu

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China)

  • Songchao Qi

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China)

  • Zhewei Chen

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China)

  • Shiqing Cheng

    (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China)

  • Qichao Xie

    (Research Institute of Exploration and Development, Petro China Changqing Oilfield Company, Xi’an 710018, China)

  • Xuefeng Qu

    (Research Institute of Exploration and Development, Petro China Changqing Oilfield Company, Xi’an 710018, China)

Abstract

The global greenhouse effect makes carbon dioxide (CO 2 ) emission reduction an important task for the world, however, CO 2 can be used as injected fluid to develop shale oil reservoirs. Conventional water injection and gas injection methods cannot achieve desired development results for shale oil reservoirs. Poor injection capacity exists in water injection development, while the time of gas breakthrough is early and gas channeling is serious for gas injection development. These problems will lead to insufficient formation energy supplement, rapid energy depletion, and low ultimate recovery. Gas injection huff and puff (huff-n-puff), as another improved method, is applied to develop shale oil reservoirs. However, the shortcomings of huff-n-puff are the low sweep efficiency and poor performance for the late development of oilfields. Therefore, this paper adopts firstly the method of Allied In-Situ Injection and Production (AIIP) combined with CO 2 huff-n-puff to develop shale oil reservoirs. Based on the data of Shengli Oilfield, a dual-porosity and dual-permeability model in reservoir-scale is established. Compared with traditional CO 2 huff-n-puff and depletion method, the cumulative oil production of AIIP combined with CO 2 huff-n-puff increases by 13,077 and 17,450 m 3 respectively, indicating that this method has a good application prospect. Sensitivity analyses are further conducted, including injection volume, injection rate, soaking time, fracture half-length, and fracture spacing. The results indicate that injection volume, not injection rate, is the important factor affecting the performance. With the increment of fracture half-length and the decrement of fracture spacing, the cumulative oil production of the single well increases, but the incremental rate slows down gradually. With the increment of soaking time, cumulative oil production increases first and then decreases. These parameters have a relatively suitable value, which makes the performance better. This new method can not only enhance shale oil recovery, but also can be used for CO 2 emission control.

Suggested Citation

  • Haiyang Yu & Songchao Qi & Zhewei Chen & Shiqing Cheng & Qichao Xie & Xuefeng Qu, 2019. "Simulation Study of Allied In-Situ Injection and Production for Enhancing Shale Oil Recovery and CO 2 Emission Control," Energies, MDPI, vol. 12(20), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3961-:d:277903
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    References listed on IDEAS

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    1. Yu, Haiyang & Rui, Zhenhua & Chen, Zhewei & Lu, Xin & Yang, Zhonglin & Liu, Junhui & Qu, Xuefeng & Patil, Shirish & Ling, Kegang & Lu, Jun, 2019. "Feasibility study of improved unconventional reservoir performance with carbonated water and surfactant," Energy, Elsevier, vol. 182(C), pages 135-147.
    2. Fanhui Zeng & Fan Peng & Jianchun Guo & Jianhua Xiang & Qingrong Wang & Jiangang Zhen, 2018. "A Transient Productivity Model of Fractured Wells in Shale Reservoirs Based on the Succession Pseudo-Steady State Method," Energies, MDPI, vol. 11(9), pages 1-16, September.
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    Cited by:

    1. Jianhong Zhu & Junbin Chen & Xiaoming Wang & Lingyi Fan & Xiangrong Nie, 2021. "Experimental Investigation on the Characteristic Mobilization and Remaining Oil Distribution under CO 2 Huff-n-Puff of Chang 7 Continental Shale Oil," Energies, MDPI, vol. 14(10), pages 1-18, May.
    2. Ganggang Hou & Xiaoli Ma & Wenyue Zhao & Pengxiang Diwu & Tongjing Liu & Jirui Hou, 2021. "Synergistic Modes and Enhanced Oil Recovery Mechanism of CO 2 Synergistic Huff and Puff," Energies, MDPI, vol. 14(12), pages 1-30, June.

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