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Study on CO 2 Huff-n-Puff Development Rule of Horizontal Wells in Heavy Oil Reservoir by Taking Liuguanzhuang Oilfield in Dagang as an Example

Author

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  • Zhenhua Xu

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China)

  • Lianwu Zhou

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Shuiping Ma

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Jianxun Qin

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Xiaodi Huang

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Bo Han

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Longqing Yang

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Yun Luo

    (The 2nd Oil Production Plant, Dagang Oilfield Company, PetroChina, Huanghua 061103, China)

  • Pengcheng Liu

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China)

Abstract

Heavy oil reservoirs are often characterized by high viscosity and poor mobility, which is more complex with the presence of bottom water. The conventional vertical well development method has low oil recovery efficiency and limited controlled reserves of a single well. In addition, water cut can increase dramatically when the edge-bottom water breaks through. Horizontal well and CO 2 huff-n-puff is an effective alternative development model for heavy oil reservoirs. This development method makes efficient use of CO 2 and accords with the “Carbon Capture, Utilization, and Storage (CCUS)”. The horizontal well can increase the drainage area. The dissolution of CO 2 improves the mobility of crude oil and increases formation energy. In this paper, we established numerical simulation models based on the Liuguanzhuang oilfield in Dagang. The characteristics and producing rules of the horizontal well and CO 2 huff-n-puff development in the heavy oil reservoir were studied. The results show that the production characteristics of horizontal well and CO 2 huff-n-puff were similar to Steam-Assisted Gravity Drainage (SAGD). CO 2 forms a viscosity reduction area above the horizontal well and the heavy oil flows into the wellbore due to gravity after viscosity reduction. The CO 2 huff-n-puff can effectively enhance the production area of horizontal wells compared with the depletion development. However, the improvement in the production area gradually decreased as CO 2 huff-n-puff cycles continued. There was a boundary of production area against the horizontal well, with the main production of heavy oil occurring at the upper and either end of the horizontal well. The CO 2 huff-n-puff has a restraining effect on the edge-bottom water, which is confirmed via the proposed theoretical model.

Suggested Citation

  • Zhenhua Xu & Lianwu Zhou & Shuiping Ma & Jianxun Qin & Xiaodi Huang & Bo Han & Longqing Yang & Yun Luo & Pengcheng Liu, 2023. "Study on CO 2 Huff-n-Puff Development Rule of Horizontal Wells in Heavy Oil Reservoir by Taking Liuguanzhuang Oilfield in Dagang as an Example," Energies, MDPI, vol. 16(11), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4258-:d:1153194
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    References listed on IDEAS

    as
    1. Zhengdong Lei & Yishan Liu & Rui Wang & Lei Li & Yuqi Liu & Yuanqing Zhang, 2022. "A Microfluidic Experiment on CO 2 Injection for Enhanced Oil Recovery in a Shale Oil Reservoir with High Temperature and Pressure," Energies, MDPI, vol. 15(24), pages 1-15, December.
    2. Zhou, Xiang & Li, Xiuluan & Shen, Dehuang & Shi, Lanxiang & Zhang, Zhien & Sun, Xinge & Jiang, Qi, 2022. "CO2 huff-n-puff process to enhance heavy oil recovery and CO2 storage: An integration study," Energy, Elsevier, vol. 239(PB).
    3. Zhou, Xiang & Yuan, Qingwang & Rui, Zhenhua & Wang, Hanyi & Feng, Jianwei & Zhang, Liehui & Zeng, Fanhua, 2019. "Feasibility study of CO2 huff 'n' puff process to enhance heavy oil recovery via long core experiments," Applied Energy, Elsevier, vol. 236(C), pages 526-539.
    4. Ren, Bo & Male, Frank & Duncan, Ian J., 2022. "Economic analysis of CCUS: Accelerated development for CO2 EOR and storage in residual oil zones under the context of 45Q tax credit," Applied Energy, Elsevier, vol. 321(C).
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