Volume 51 Issue 5
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ZHAO Huan, LI Wei, TANG Pengfei, et al. Study on the distribution law of near-wellbore in-situ stress and casing load under fracturing conditions [J]. Petroleum Drilling Techniques，2023, 51(5)：106-111. DOI: 10.11911/syztjs.2023092
Citation: ZHAO Huan, LI Wei, TANG Pengfei, et al. Study on the distribution law of near-wellbore in-situ stress and casing load under fracturing conditions [J]. Petroleum Drilling Techniques，2023, 51(5)：106-111. DOI: 10.11911/syztjs.2023092
shu

Study on the Distribution Law of Near-Wellbore in-situ Stress and Casing Load under Fracturing Conditions

  • 1.

    School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China

  • 2.

    National Engineering Research Center of Oil & Gas Drilling and Completion Technology, Daqing, Heilongjiang, 163318, China

  • 3.

    Oil Production Engineering Research Institute, PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjing, 163453, China

  • 4.

    Sinopec Xinjiang Xinchun Petroleum Development Co., Ltd., Dongying, Shandong, 257000, China

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  • Received Date: May 07, 2023
  • Revised Date: August 28, 2023
  • Available Online: September 07, 2023
    Graphical Abstract
    • Abstract

  • In order to study the casing damage mechanism and the influencing factors of casing load under hydraulic fracturing conditions, rock mechanics tests were carried out, and a multi-field coupled finite element analysis model of casing, cement sheathe, formation, and fracture was established. Distribution law and influencing factors of near-wellbore in-situ stress and casing load under hydraulic fracturing propagation were analyzed. The results showed that the natural fractures in the reservoir caused the non-uniform propagation of hydraulic fractures, and the casing was subjected to a non-uniform load. The in-situ stress difference increased and the elastic modulus decreased while the near-wellbore in-situ stress and casing load increased. The influence of the natural fracture number and the distribution pattern of natural fractures on the near-wellbore in-situ stress and casing load were complicated. The research results provide a theoretical basis for optimizing the cementing design and fracturing design of shale reservoirs and reducing casing damage.

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