Volume 42 Issue 5
Sep.  2025
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LEI Shaofei, XIAO Chao, SONG Bitao, et al.Thermoplastic thermosensitive adhesive resin lost circulation material (LCM) and its adhension plugging mechanism[J]. Drilling Fluid & Completion Fluid，2025, 42（5）：609-616 doi: 10.12358/j.issn.1001-5620.2025.05.006
Citation: LEI Shaofei, XIAO Chao, SONG Bitao, et al.Thermoplastic thermosensitive adhesive resin lost circulation material (LCM) and its adhension plugging mechanism[J]. Drilling Fluid & Completion Fluid，2025, 42（5）：609-616 doi: 10.12358/j.issn.1001-5620.2025.05.006
shu

Thermoplastic thermosensitive adhesive resin lost circulation material (LCM) and its adhension plugging mechanism

doi: 10.12358/j.issn.1001-5620.2025.05.006
  • 1.

    SINOPEC Research Institute of Petroleum Engineering Co., Ltd., Beijing 102206

  • 2.

    State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 102206

  • Received Date: 2025-04-06
  • Rev Recd Date: 2025-05-12
  • Publish Date: 2025-09-30
    Abstract
  • Aiming at the problems such as low success rate of plugging and insufficient pressure bearing capacity of plugging layer caused by non-bonding force interaction between particles of conventional bridging materials, this paper developed a thermoplastic thermosensitive bonding resin plugging agent using acrylonitrile-styryl-butadiene copolymer as matrix resin and modified by blending maleic anhydride and petroleum resin. The properties of thermoplastic thermo-adhesive resin were characterized by infrared, thermogravimetric, DMA and high temperature and high pressure plugging instruments. The bonding mechanism of thermoplastic resin was analyzed. The results show that the plugging agent has good bonding and plugging performance at high temperature, and the pressure bearing capacity is as high as 8.2 MPa at 180℃. The thermosensitive adhesive resin is granular at room temperature and semi-molten solid after reaching the activation temperature. After entering the crack, it can self-adhesive plug through molecular chain diffusion and entanglement, so as to realize the thermosensitive, adaptive and efficient plugging function. Under high temperature conditions, thermoplastic resin thermosensitive adhesive resin can effectively improve the success rate of one-time plugging and pressure plugging ability, which provides a new theoretical and technical way to solve the problem of lost circulation during drilling.

     

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