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Numerical Investigation of Downhole Perforation Pressure for a Deepwater Well

Author

Listed:
  • Qiao Deng

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

  • Hui Zhang

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

  • Jun Li

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

  • Xuejun Hou

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

  • Binxing Zhao

    (School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China)

Abstract

During the production of deepwater wells, downhole perforation safety is one of the key technical problems. The perforation fluctuating pressure is an important factor in assessing the wellbore safety threat. Due to difficulty in describing the downhole perforation pressure by using the existing empirical correlations, a prediction model based on data fitting of a large number of numerical simulations has been proposed. Firstly, a numerical model is set up to obtain the dynamic data of downhole perforation, and the exponential attenuation model of perforation pressure in the wellbore is established. Secondly, a large number of numerical simulations have been carried out through orthogonal test design. The results reveal that the downhole perforation pressure is logarithmic to the total charge quantity, increases linearly to the wellbore initial pressure, shows an exponential relationship with downhole effective volume for perforation, and has a power relationship with the thickness of casing and cement as well as formation elastic modulus. Thirdly, the prediction of perforation peak pressure at different positions along the wellbore agrees well with the field measurement within a 10% error. Finally, the results of this study have been applied in the field case, and an optimization scheme for deepwater downhole perforation safety has been put forward.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3795-:d:274120
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    References listed on IDEAS

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    3. 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.
    4. Yan Xi & Jun Li & Gonghui Liu & Jianping Li & Jiwei Jiang, 2019. "Mechanisms and Influence of Casing Shear Deformation near the Casing Shoe, Based on MFC Surveys during Multistage Fracturing in Shale Gas Wells in Canada," Energies, MDPI, vol. 12(3), pages 1-22, January.
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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.

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