Multi-scale characterizations of thermosensitive adhesive resin embedded with bridging materials: Toward forming stable plugging in fractured formations
Abstract
Lost circulation in fractured formations remains a persistent challenge in drilling operations, causing substantial economic losses and increased operational risk. Conventional granular bridging packs are mechanically fragile and can be destabilized by pressure fluctuations, limiting one-trip plugging efficiency. This study incorporates a thermosensitive adhesive resin into bridging assemblies to enhance plug integrity by promoting interparticle adhesion and particle-wall coupling after thermal activation. Oscillatory temperature-sweep rheometry is used to quantify the temperature-dependent viscoelastic response of resinparticle composites. A wedge-shaped fracture analogue with photoelastic visualization is used to monitor force chain development and uniformity during progressive loading. Discrete element method simulations in Particle Flow Code, using a linear parallelbond contact model, resolve mesoscale load-transfer pathways and isolate the contribution of adhesive interactions. Results indicate that thermosensitive adhesive resin increases assembly coherence, promotes a stable load-bearing skeleton, and suppresses stress localization that typically precedes plugging failure. The strengthening trend is governed by particle rigidity and surface characteristics, yielding consistent load-transfer patterns across experiments and simulations. These findings demonstrate that thermally activated adhesion can transform unconsolidated granular packs into mechanically stable plugging zones, providing a mechanistic basis for designing high-stability lost circulation control systems in fractured formations.
Document Type: Original article
Cited as: Lang, Y., Bai, Y., Sun, J., Li, H., Yang, J., Lv, K. Multi-scale characterizations of thermosensitive adhesive resin embedded with bridging materials: Toward forming stable plugging in fractured formations. Advances in Geo-Energy Research, 2026, 19(2): 166-181. https://doi.org/10.46690/ager.2026.02.05
DOI:
https://doi.org/10.46690/ager.2026.02.05Keywords:
Thermosensitive adhesive resin, bridging material, interaction mechanism, discrete element simulation, fracture plugging, lost circulation controlReferences
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Copyright (c) 2026 Youming Lang, Yingrui Bai, Jinsheng Sun, Huazhou Li, Jingbin Yang, Kaihe Lv
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