{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T05:08:10Z","timestamp":1788930490270,"version":"build-2803163510"},"reference-count":21,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:00:00Z","timestamp":1788220800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Severe steam channeling in heterogeneous heavy oil reservoirs severely restricts thermal recovery efficiency, as conventional conformance control materials cannot simultaneously achieve long-term high-temperature resistance and deep reservoir penetration. This work develops a high-temperature-resistant epoxy-based liquid microsphere system for deep profile control in heavy oil steam flooding. A triple thermal-stabilization strategy is constructed: imide chain extension to enhance backbone rigidity, benzoxazine-phthalonitrile grafting to form dense triazine crosslinked networks, and KH-550-functionalized nano-silica for synergistic reinforcement. FT-IR and 1H NMR verify the successful incorporation of rigid imide and triazine structures. TGA confirms the optimal formulation exhibits less than 5% mass loss at 350 \u00b0C. Multi-segment sand-packed tube tests demonstrate favorable deep migration capacity with inter-stage pressure ratios below 4 across 5000\u201315,000 \u00d7 10\u22123 \u03bcm2 permeability, and the cured network retains over 95% plugging efficiency after 350 \u00b0C steam scouring. Dual-tube heterogeneous flooding delivers 12.05% incremental oil recovery, outperforming rigid inorganic particles. This system provides a high-performance candidate for deep steam channeling mitigation in heavy oil thermal recovery.<\/jats:p>","DOI":"10.3390\/polym18172133","type":"journal-article","created":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T15:08:43Z","timestamp":1788275323000},"page":"2133","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synthesis and Migration-Plugging Performance of a Novel High-Temperature Resistant Epoxy-Based Profile Control Agent for Heavy Oil Steam Flooding"],"prefix":"10.3390","volume":"18","author":[{"given":"Jinxiang","family":"Liu","sequence":"first","affiliation":[{"name":"Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xianpei","family":"Yin","sequence":"additional","affiliation":[{"name":"Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yifei","family":"Gao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiangguo","family":"Lu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongwen","family":"Zhang","sequence":"additional","affiliation":[{"name":"CNOOC Key Laboratory of Offshore Heavy Oil Thermal Recovery, Tianjin 300452, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongyu","family":"Wang","sequence":"additional","affiliation":[{"name":"CNOOC Key Laboratory of Offshore Heavy Oil Thermal Recovery, Tianjin 300452, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiuxia","family":"Wang","sequence":"additional","affiliation":[{"name":"CNOOC Key Laboratory of Offshore Heavy Oil Thermal Recovery, Tianjin 300452, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Liu","sequence":"additional","affiliation":[{"name":"CNOOC Key Laboratory of Offshore Heavy Oil Thermal Recovery, Tianjin 300452, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"130123","DOI":"10.1016\/j.fuel.2023.130123","article-title":"An Innovative Fracture Plugging Evaluation Method for Drill-in Fluid Loss Control and Formation Damage Prevention in Deep Fractured Tight Reservoirs","volume":"358","author":"Xu","year":"2024","journal-title":"Fuel"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"545","DOI":"10.1080\/12269328.2025.2566838","article-title":"Micromechanical Interaction of Inorganic Solid Particles with Astratigraphic Rocks and Their Transport Mechanism within Porous Media","volume":"29","author":"Zhang","year":"2026","journal-title":"Geosyst. 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