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Enhancement of gas production from low-permeability hydrate by radially branched horizontal well: Shenhu Area, South China Sea

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  • Jin, Guangrong
  • Peng, Yingyu
  • Liu, Lihua
  • Su, Zheng
  • Liu, Jie
  • Li, Tingting
  • Wu, Daidai

Abstract

A high gas production rate is critical for commercial exploitation of hydrate. Most marine hydrates deposit in the silty or clay sediments with low permeability, and gas production rate is low. Herein, a novel deployment of well, radial three-branch horizontal well was numerically investigated to enhance the gas production. A 3D geological model was established based on field trial in the Shenhu Area of the South China Sea. The simulation showed similar gas and water production for single and multi-branch horizontal wells with same length of 250 m. The depth in which well deployed dramatically affects the gas and water production, and which increases with the length of multi-branch well. Meanwhile the ratio of free gas originally distributed in three-phase and gas layers also increases with the length, which is 50% for 1200 m well. The interference around the intersection of branches enhances temperature recovery and the dissociation of underlying hydrates. The standard energy return on investment analysis shows that the economic potential increases linearly with the length of multi-branch well and obviously depends on the content of initial free gas. However, the production balances investment confines only to tens or hundreds of days for all model scenarios.

Suggested Citation

  • Jin, Guangrong & Peng, Yingyu & Liu, Lihua & Su, Zheng & Liu, Jie & Li, Tingting & Wu, Daidai, 2022. "Enhancement of gas production from low-permeability hydrate by radially branched horizontal well: Shenhu Area, South China Sea," Energy, Elsevier, vol. 253(C).
  • Handle: RePEc:eee:energy:v:253:y:2022:i:c:s0360544222010325
    DOI: 10.1016/j.energy.2022.124129
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    1. Cao, Xinxin & Sun, Jiaxin & Qin, Fanfan & Ning, Fulong & Mao, Peixiao & Gu, Yuhang & Li, Yanlong & Zhang, Heen & Yu, Yanjiang & Wu, Nengyou, 2023. "Numerical analysis on gas production performance by using a multilateral well system at the first offshore hydrate production test site in the Shenhu area," Energy, Elsevier, vol. 270(C).
    2. Jin, Guangrong & Su, Zheng & Zhai, Haizhen & Feng, Chuangji & Liu, Jie & Peng, Yingyu & Liu, Lihua, 2023. "Enhancement of gas production from hydrate reservoir using a novel deployment of multilateral horizontal well," Energy, Elsevier, vol. 270(C).
    3. Mao, Peixiao & Wu, Nengyou & Wan, Yizhao & Hu, Gaowei & Wang, Xingxing, 2023. "Optimization of a multi-fractured multilateral well network in advantageous structural positions of ultralow-permeability hydrate reservoirs," Energy, Elsevier, vol. 268(C).
    4. Zhang, Yiqun & Zhang, Panpan & Hui, Chengyu & Tian, Shouceng & Zhang, Bo, 2023. "Numerical analysis of the geomechanical responses during natural gas hydrate production by multilateral wells," Energy, Elsevier, vol. 269(C).
    5. Jin, Guangrong & Liu, Jie & Su, Zheng & Feng, Chuangji & Cheng, Sanshan & Zhai, Haizhen & Liu, Lihua, 2024. "Gas production from a promising reservoir of the hydrate with associated and shallow gas layers in the low permeable sediments," Energy, Elsevier, vol. 295(C).
    6. Li, Xiao-Yan & Wang, Yi & Li, Xiao-Sen & Zhou, Shi-Dong & Liu, Yang & Lv, Xiao-Fang, 2024. "Study on the production of gas hydrates and underlying free gas by horizontal well under different directions of hydraulic fracturing," Energy, Elsevier, vol. 290(C).
    7. Ye, Hongyu & Chen, Daoyi & Yao, Yuanxin & Wu, Xuezhen & Li, Dayong & Zi, Mucong, 2024. "Exploration of production capacity-geomechanical evaluation and CO2 reinjection repair strategy in natural gas hydrate production by multilateral horizontal wells," Energy, Elsevier, vol. 296(C).
    8. Qian Wang & Hairong Lian & Wanjing Luo & Bailu Teng & Xinyu Fang & Gang Yao, 2022. "Radially Symmetrical Heat Hydrate Dissociation Model with a Density Difference," Energies, MDPI, vol. 15(22), pages 1-11, November.
    9. Wang, Feifei & Shen, Kaixiang & Zhang, Zhilei & Zhang, Di & Wang, Zhenqing & Wang, Zizhen, 2023. "Numerical simulation of natural gas hydrate development with radial horizontal wells based on thermo-hydro-chemistry coupling," Energy, Elsevier, vol. 272(C).
    10. Guo, Yang & Li, Shuxia & Qin, Xuwen & Lu, Cheng & Wu, Didi & Liu, Lu & Zhang, Ningtao, 2023. "Enhanced gas production from low-permeability hydrate reservoirs based on embedded discrete fracture models: Influence of branch parameters," Energy, Elsevier, vol. 282(C).
    11. Guo, Wei & Zhong, Xiuping & Chen, Chen & Zhang, Pengyu & Liu, Zhao & Wang, Yuan & Tu, Guigang, 2024. "Stimulation effect of network fracturing combined with sealing boundaries on the depressurization development of hydrate reservoir in China's offshore test site," Energy, Elsevier, vol. 302(C).
    12. Xue, Kunpeng & Liu, Yu & Yu, Tao & Yang, Lei & Zhao, Jiafei & Song, Yongchen, 2023. "Numerical simulation of gas hydrate production in shenhu area using depressurization: The effect of reservoir permeability heterogeneity," Energy, Elsevier, vol. 271(C).

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