{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:46:50Z","timestamp":1791334010071,"version":"4.3.1"},"reference-count":27,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2025,4,22]],"date-time":"2025-04-22T00:00:00Z","timestamp":1745280000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Gels"],"abstract":"<jats:p>Lost circulation has become one of the important problems restricting the speed and efficiency of oil and gas drilling and production. To address severe drilling fluid losses in high-temperature fractured formations during deep\/ultra-deep well drilling, this study developed a high-temperature and high-strength gelled resin gel plugging system through optimized resin matrix selection, latent curing agent, flow regulator, filling material, etc. Comparative analysis of five thermosetting resins revealed urea-formaldehyde resin as the optimal matrix, demonstrating complete curing at 100\u2013140 \u00b0C with a compressive strength of 9.3 MPa. An organosilicon crosslsinker-enabled water-soluble urea-formaldehyde resin achieved controlled solubility and flow\u2013cure balance under elevated temperatures. Orthogonal experiments identified that a 10% latent curing agent increased compressive strength to 6.26 MPa while precisely regulating curing time to 2\u20132.5 h. Incorporating 0.5% rheological modifier imparted shear-thinning and static-thickening behaviors, synergizing pumpability with formation retention. The optimal formula (25% urea-formaldehyde resin, 10% latent curing agent, 10% high-fluid-loss filler, 0.5% rheological modifier) exhibited superior thermal stability (initial decomposition temperature 241 \u00b0C) and mechanical integrity (bearing pressure 13.95 MPa in 7 mm wedge-shaped fractures at 140 \u00b0C). Microstructural characterization confirmed interlocking crystalline layers through ether-bond crosslinking, providing critical insights for high-temperature wellbore stabilization.<\/jats:p>","DOI":"10.3390\/gels11050310","type":"journal-article","created":{"date-parts":[[2025,4,22]],"date-time":"2025-04-22T20:11:48Z","timestamp":1745352708000},"page":"310","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Preparation and Physicochemical Properties of High-Temperature-Resistant Polymer Gel Resin Composite Plugging Material"],"prefix":"10.3390","volume":"11","author":[{"given":"Tao","family":"Wang","sequence":"first","affiliation":[{"name":"School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China"},{"name":"Tarim Oilfield Branch, Korla 841000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weian","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinzhi","family":"Zhu","sequence":"additional","affiliation":[{"name":"Tarim Oilfield Branch, Korla 841000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengli","family":"Li","sequence":"additional","affiliation":[{"name":"Tarim Oilfield Branch, Korla 841000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guochuan","family":"Qin","sequence":"additional","affiliation":[{"name":"Tarim Oilfield Branch, Korla 841000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haiying","family":"Lu","sequence":"additional","affiliation":[{"name":"Tarim Oilfield Branch, Korla 841000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,22]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"Progress and challenges of drilling and completion technologies for deep, ultra-deep and horizontal wells of CNPC","volume":"28","author":"Wang","year":"2023","journal-title":"China Pet. 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