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Mechanism of Casing String Curvature Due to Displacement of Surface Strata

Author

Listed:
  • Maciej Dutkiewicz

    (Faculty of Civil and Environmental Engineering and Architecture, Bydgoszcz University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland)

  • Ivan Shatskyi

    (Laboratory of Modeling of Damping Systems, Pidstryhach-Institute for Applied Problems in Mechanics and Mathematics of the National Academy of Sciences of Ukraine, Mykytynetska Str. 3, 76002 Ivano-Frankivsk, Ukraine)

  • Oleh Martsynkiv

    (Department of Oil and Gas Well Drilling, Ivano-Frankivsk National Technical University of Oil and Gas, Karpatska Str. 15, 76019 Ivano-Frankivsk, Ukraine)

  • Eduard Kuzmenko

    (Department of Geoinformation Systems and Technologies, Ivano-Frankivsk National Technical University of Oil and Gas, Karpatska Str. 15, 76019 Ivano-Frankivsk, Ukraine)

Abstract

One of the main problems of well operation is the risk of uncontrolled leakage of hydrocarbons into the environment. This problem is especially relevant for the long-term operation of wells. The idea for this study was inspired by a real industrial problem that the authors of the article were involved in solving. At several operating gas wells, an abnormal slope of the production tree occurred, which raised the question of the safety of their further operation. An analysis of known studies and current regulatory documents did not allow us to assess the safety of using a gas well based on the measured kinematic parameters of production tree deviations. A mathematical model for the deformation of a package of casing strings when the surface layer of the rock is displaced is developed in the article. A boundary value problem is formulated for differential equations of pipe bending on an elastic foundation. Based on the results of solving this problem, an unambiguous relationship was established between the maximum bending stress in the surface pipe and the angle of inclination of the production tree. The quantitative characteristics of the connection depend on the geometric and mechanical properties of the pipes and on the thickness and mechanical parameters of the formations. It was established that the existing inclination of the production tree can be achieved due to the beginning of the plastic bending of the surface pipe under the slickenside, which does not exclude the exhaustion of the safety margin of the surface pipe and indicates the possible operation of the casing string in a pre-emergency state. In general, the obtained results develop analytical approaches to assessing the behavior of underground structures of a production well in unstable soil bodies.

Suggested Citation

  • Maciej Dutkiewicz & Ivan Shatskyi & Oleh Martsynkiv & Eduard Kuzmenko, 2022. "Mechanism of Casing String Curvature Due to Displacement of Surface Strata," Energies, MDPI, vol. 15(14), pages 1-12, July.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5031-:d:859516
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    References listed on IDEAS

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    1. Wanchun Zhao & Jing Ge & Ranjith Pathegama Gamage & Yuwei Li & Zhenlong Song & Tingting Wang, 2019. "Study of Deformation Law of Casing Local Lateral Collapse Based on the Principle of Virtual Work," Energies, MDPI, vol. 12(19), pages 1-23, September.
    2. Dongfeng Li & Fu Yu & Heng Fan & Rui Wang & Shangyu Yang & Xiangzhen Yan, 2021. "Casing Collapse Strength Analysis under Nonuniform Loading Using Experimental and Numerical Approach," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-12, September.
    3. Oleg Bazaluk & Orest Slabyi & Vasyl Vekeryk & Andrii Velychkovych & Liubomyr Ropyak & Vasyl Lozynskyi, 2021. "A Technology of Hydrocarbon Fluid Production Intensification by Productive Stratum Drainage Zone Reaming," Energies, MDPI, vol. 14(12), pages 1-15, June.
    4. Oleg Bazaluk & Andrii Velychkovych & Liubomyr Ropyak & Mykhailo Pashechko & Tetiana Pryhorovska & Vasyl Lozynskyi, 2021. "Influence of Heavy Weight Drill Pipe Material and Drill Bit Manufacturing Errors on Stress State of Steel Blades," Energies, MDPI, vol. 14(14), pages 1-15, July.
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    Cited by:

    1. Maciej Dutkiewicz & Andrii Velychkovych & Andriy Andrusyak & Ivan Petryk & Andrii Kychma, 2023. "Analytical Model of Interaction of an Oil Pipeline with a Support of an Overpass Built in a Mountainous Area," Energies, MDPI, vol. 16(11), pages 1-18, May.

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