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Study of Downhole Shock Loads for Ultra-Deep Well Perforation and Optimization Measures

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  • Qiao Deng

    (College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping, Beijing 102249, China
    Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O’Hara St, Pittsburgh, PA 15261, USA)

  • Hui Zhang

    (College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping, Beijing 102249, China)

  • Jun Li

    (College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping, Beijing 102249, China)

  • Xuejun Hou

    (School of Petroleum Engineering, Chongqing University of Science & Technology, 20 East Road, University City, Shapingba District, Chongqing 401331, China)

  • Hao Wang

    (College of Petroleum Engineering, China University of Petroleum-Beijing, 18 Fuxue Road, Changping, Beijing 102249, China)

Abstract

Ultra-deep well perforation is an important direction for the development of unconventional oil and gas resources, the security with shock loads is a difficult technical problem. Firstly, the theoretical analysis of perforated string is carried out, the dynamics models of which are established in the directions of axial, radial and circumferential. Secondly, the process of perforating with hundreds of bullets is simulated by using the software of LS-DYNA (ANSYS, Inc, Pennsylvania, USA). The propagation attenuation model of shock loads is established, and a calculation model to predict shock loads at different positions of the tubing interval has been fitted by considering multiple factors. The dynamic response of perforated string is studied, and the vulnerable parts of which are found out. Thirdly, the optimization measures are put forward for ultra-deep well perforation by the design of shock adsorption and safety distance of the packer. Finally, the field case of an ultra-deep well shows that the research method in this paper is practical, and the optimization measures are reasonable and effective. This study can provide important guidance to reduce shock damage and improve security for ultra-deep well perforation.

Suggested Citation

  • Qiao Deng & Hui Zhang & Jun Li & Xuejun Hou & Hao Wang, 2019. "Study of Downhole Shock Loads for Ultra-Deep Well Perforation and Optimization Measures," Energies, MDPI, vol. 12(14), pages 1-23, July.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:14:p:2743-:d:249286
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    References listed on IDEAS

    as
    1. Qiu, Qingan & Cui, Lirong, 2019. "Optimal mission abort policy for systems subject to random shocks based on virtual age process," Reliability Engineering and System Safety, Elsevier, vol. 189(C), pages 11-20.
    2. Xingwei Zhen & Torgeir Moan & Zhen Gao & Yi Huang, 2018. "Risk Assessment and Reduction for an Innovative Subsurface Well Completion System," Energies, MDPI, vol. 11(5), pages 1-19, May.
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    Cited by:

    1. Reza Rezaee, 2022. "Editorial on Special Issues of Development of Unconventional Reservoirs," Energies, MDPI, vol. 15(7), pages 1-9, April.
    2. Qiao Deng & Hui Zhang & Jun Li & Xuejun Hou & Binxing Zhao, 2019. "Numerical Investigation of Downhole Perforation Pressure for a Deepwater Well," Energies, MDPI, vol. 12(19), pages 1-21, October.

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