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Analysis of Coupled Wellbore Temperature and Pressure Calculation Model and Influence Factors under Multi-Pressure System in Deep-Water Drilling

Author

Listed:
  • Ruiyao Zhang

    (College of petroleum engineering, China University of Petroleum-Beijing, Beijing 102249, China)

  • Jun Li

    (College of petroleum engineering, China University of Petroleum-Beijing, Beijing 102249, China)

  • Gonghui Liu

    (College of petroleum engineering, China University of Petroleum-Beijing, Beijing 102249, China
    College of petroleum engineering, Beijing University of Technology, Beijing 100192, China)

  • Hongwei Yang

    (College of petroleum engineering, China University of Petroleum-Beijing, Beijing 102249, China)

  • Hailong Jiang

    (College of petroleum engineering, China University of Petroleum-Beijing, Beijing 102249, China)

Abstract

The purpose of this paper is to discuss the variation of wellbore temperature and bottom-hole pressure with key factors in the case of coupled temperature and pressure under multi-pressure system during deep-water drilling circulation. According to the law of energy conservation and momentum equation, the coupled temperature and pressure calculation model under multi-pressure system is developed by using the comprehensive convective heat transfer coefficient. The model is discretized and solved by finite difference method and Gauss Seidel iteration respectively. Then the calculation results of this paper are compared and verified with previous research models and field measured data. The results show that when the multi-pressure system is located in the middle formation, the temperature of the annulus corresponding to location of the system is the most affected, and the temperature of the other areas in annulus is hardly affected. However, when the multi-pressure system is located at the bottom hole, the annulus temperature is greatly affected from bottom hole to mudline. In addition, the thermo-physical parameters of the drilling fluid can be changed by overflow and leakage. When only overflow occurs, the annulus temperature increases the most, but the viscosity decreases the most. When only leakage occurs, the annulus temperature decreases the most and the viscosity increases the most. However, when the overflow rate is greater than the leakage rate, the mud density and bottom-hole pressure increase the most, and both increase the least when only leakage occurs. Meanwhile, bottom-hole pressure increases with the increase of pump rate but decreases with the increase of inlet temperature. The research results can provide theoretical guidance for safe drilling in complex formations such as multi-pressure systems.

Suggested Citation

  • Ruiyao Zhang & Jun Li & Gonghui Liu & Hongwei Yang & Hailong Jiang, 2019. "Analysis of Coupled Wellbore Temperature and Pressure Calculation Model and Influence Factors under Multi-Pressure System in Deep-Water Drilling," Energies, MDPI, vol. 12(18), pages 1-27, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:18:p:3533-:d:267339
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    References listed on IDEAS

    as
    1. Yang, Mou & Li, Xiaoxiao & Deng, Jianmin & Meng, Yingfeng & Li, Gao, 2015. "Prediction of wellbore and formation temperatures during circulation and shut-in stages under kick conditions," Energy, Elsevier, vol. 91(C), pages 1018-1029.
    2. Zhang, Zheng & Xiong, Youming & Gao, Yun & Liu, Liming & Wang, Menghao & Peng, Geng, 2018. "Wellbore temperature distribution during circulation stage when well-kick occurs in a continuous formation from the bottom-hole," Energy, Elsevier, vol. 164(C), pages 964-977.
    3. Yang, Hongwei & Li, Jun & Liu, Gonghui & Wang, Chao & Li, Mengbo & Jiang, Hailong, 2019. "Numerical analysis of transient wellbore thermal behavior in dynamic deepwater multi-gradient drilling," Energy, Elsevier, vol. 179(C), pages 138-153.
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    Cited by:

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    2. Mehrdad Massoudi, 2020. "Mathematical Modeling of Fluid Flow and Heat Transfer in Petroleum Industries and Geothermal Applications," Energies, MDPI, vol. 13(6), pages 1-4, March.
    3. Anna Wachowicz-Pyzik & Anna Sowiżdżał & Leszek Pająk & Paweł Ziółkowski & Janusz Badur, 2020. "Assessment of the Effective Variants Leading to Higher Efficiency for the Geothermal Doublet, Using Numerical Analysis‒Case Study from Poland (Szczecin Trough)," Energies, MDPI, vol. 13(9), pages 1-20, May.

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