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Production performance of oil shale in-situ conversion with multilateral wells

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  • Song, Xianzhi
  • Zhang, Chengkai
  • Shi, Yu
  • Li, Gensheng

Abstract

A novel method using multilateral wells to perform oil shale in-situ conversion process is proposed in this paper. This method constructs radial branches in upper and lower oil shale formation as injection and production wells. Hot fluids are injected from the injection wells, and pyrolyzed oil and gas are extracted by production wells. In this study, a 3D transient model coupling fluid flow, heat transfer and chemical process is established and implemented on COMSOL Multiphysics platform to investigate the oil shale in-situ conversion process. The temperature field, production characteristics and energy performance are characterized. Sensitivity of oil shale properties and operational parameters are analyzed. Influences of multilateral-well arrangements are studied. The simulation results indicate that the products are strongly dependent to oil shale temperature. The specific heat capacity, injection fluid temperature and injection mass flow rate can significantly influence production performance, while thermal conductivity has negligible effect. Multilateral wells with 5 branches, 60° branch angle and 40 m branch length show the best production performance among the computational cases. This study provides comprehensive insights and suggestions for the application of multilateral wells in oil shale in-situ conversion process.

Suggested Citation

  • Song, Xianzhi & Zhang, Chengkai & Shi, Yu & Li, Gensheng, 2019. "Production performance of oil shale in-situ conversion with multilateral wells," Energy, Elsevier, vol. 189(C).
  • Handle: RePEc:eee:energy:v:189:y:2019:i:c:s0360544219318407
    DOI: 10.1016/j.energy.2019.116145
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    5. Xu, HengYu & Yu, Hao & Fan, JingCun & Xia, Jun & Liu, He & Wu, HengAn, 2022. "Formation mechanism and structural characteristic of pore-networks in shale kerogen during in-situ conversion process," Energy, Elsevier, vol. 242(C).
    6. Shi, Yu & Zhang, Yulong & Song, Xianzhi & Cui, Qiliang & Lei, Zhihong & Song, Guofeng, 2023. "Injection energy utilization efficiency and production performance of oil shale in-situ exploitation," Energy, Elsevier, vol. 263(PB).
    7. Hao Wang & Xiaogang Li & Jingyi Zhu & Zhaozhong Yang & Jie Zhou & Liangping Yi, 2022. "Numerical Simulation of Oil Shale Pyrolysis under Microwave Irradiation Based on a Three-Dimensional Porous Medium Multiphysics Field Model," Energies, MDPI, vol. 15(9), pages 1-20, April.
    8. Huang, HanWei & Yu, Hao & Xu, WenLong & Lyu, ChengSi & Micheal, Marembo & Xu, HengYu & Liu, He & Wu, HengAn, 2023. "A coupled thermo-hydro-mechanical-chemical model for production performance of oil shale reservoirs during in-situ conversion process," Energy, Elsevier, vol. 268(C).
    9. Damian Janiga & Daniel Podsobiński & Paweł Wojnarowski & Jerzy Stopa, 2020. "End-Point Model for Optimization of Multilateral Well Placement in Hydrocarbon Field Developments," Energies, MDPI, vol. 13(15), pages 1-24, July.
    10. Juan Jin & Weidong Jiang & Jiandong Liu & Junfeng Shi & Xiaowen Zhang & Wei Cheng & Ziniu Yu & Weixi Chen & Tingfu Ye, 2023. "Numerical Analysis of In Situ Conversion Process of Oil Shale Formation Based on Thermo-Hydro-Chemical Coupled Modelling," Energies, MDPI, vol. 16(5), pages 1-17, February.
    11. Hui, Gang & Chen, Zhangxin & Wang, Youjing & Zhang, Dongmei & Gu, Fei, 2023. "An integrated machine learning-based approach to identifying controlling factors of unconventional shale productivity," Energy, Elsevier, vol. 266(C).
    12. Gang Hui & Fei Gu & Junqi Gan & Erfan Saber & Li Liu, 2023. "An Integrated Approach to Reservoir Characterization for Evaluating Shale Productivity of Duvernary Shale: Insights from Multiple Linear Regression," Energies, MDPI, vol. 16(4), pages 1-18, February.
    13. Yang, Qinchuan & Guo, Wei & Xu, Shaotao & Zhu, Chaofan, 2023. "The autothermic pyrolysis in-situ conversion process for oil shale recovery: Effect of gas injection parameters," Energy, Elsevier, vol. 283(C).
    14. Hao Wang & Jianzheng Su & Jingyi Zhu & Zhaozhong Yang & Xianglong Meng & Xiaogang Li & Jie Zhou & Liangping Yi, 2022. "Numerical Simulation of Oil Shale Retorting Optimization under In Situ Microwave Heating Considering Electromagnetics, Heat Transfer, and Chemical Reactions Coupling," Energies, MDPI, vol. 15(16), pages 1-14, August.

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