改性环氧树脂在抗腐蚀水泥浆中的应用  

Application of modified epoxy resin in corrosion resistant cement slurry

作　　者：邓林 马疆 刘德杰 魏瑞华 裴雪峰 宋会光 DENG Lin;MA Jiang;LIU De jie;WEI Rui hua;PEI Xue feng;SONG Hui guang(Engineering Technology Research Institute of CNPC Xibu Drilling Engineering Company Limited,Karamay Xinjiang 834000,China;Cementing Technology Research Center of CNPC Xibu Drilling Engineering Company Limited,Karamay Xinjiang 834000,China;Exploration Division of PetroChina Xinjiang Oilfield Company,Karamay Xinjiang 834000,China)

机构地区：[1]西部钻探工程技术研究院,新疆克拉玛依834000 [2]西部钻探固井公司,新疆克拉玛依834000 [3]新疆油田勘探事业部,新疆克拉玛依834000

出　　处：《内蒙古石油化工》2024年第3期25-28,共4页Inner Mongolia Petrochemical Industry

摘　　要：在CCUS井中,水泥石抗腐蚀能力和力学性能是确保水泥环密封完整性的关键。抗腐蚀水泥浆体系最常用的是胶乳等成膜堵孔类聚合物材料通过提高水泥石致密性,降低水泥石渗透率,进而降低提高CO_(2)的侵入阻力。但胶乳等材料会导致水泥石抗压强度较低的问题,不利于CCUS井前期压裂、后期的反复注采中保持水泥环长期完整性。本研究采用可固化树脂代替胶乳,起到降低扩散速率作用的同时,提高水泥石力学性能。利用脂肪醇聚氧乙烯醚对环氧树脂改性,优选2-乙基-4-甲基咪唑为固化剂,形成的树脂与固化剂体系可直接混入配浆水中,现场作业简便,且树脂的固化反应与水泥浆的稠化反应相互独立,树脂水泥浆复合体系的耐温能力强,130℃条件下流动性好、稠化时间可调,7d抗压强度最高达51.1MPa,杨氏模量低至4.97GPa。树脂固化体可有效提高水泥石致密性,降低水泥石渗透率,进而降低提高CO_(2)的侵入阻力,形成的树脂水泥浆复合体系具有良好的抗腐蚀性能。In CCUS Wells,the corrosion resistance and mechanical properties of cement stone are key to ensure the integrity of cement ring seal.The most commonly used anti-corrosion cement slurry system is film-forming and plugging polymer materials such as latex,which can improve the density of cement stone and reduce the permeability of cement stone,and thus reduce the intrusion resistance of increasing CO_(2).However,latex and other materials will lead to low compressive strength of the cement stone,which is not conducive to the long-term integrity of the cement ring during the early fracturing and later repeated injection and production of CCUS Wells.In this study,curable resin was used instead of latex to reduce the diffusion rate and improve the mechanical properties of cement.The epoxy resin was modified with fatty alcohol polyoxyethylene ether,and 2-ethyl-4-methylimidazole was selected as the curing agent.The resin and curing agent system formed could be directly mixed with the slurry water.The site operation was simple,and the curing reaction of the resin was independent of the thickening reaction of the cement slurry.The resin cement slurry composite system has strong temperature resistance,good fluidity at 130℃,adjustable thickening time,7d compressive strength up to 51.1MPa,and Young's modulus as low as 4.97GPa.The resin solidified body can effectively improve the compactness of cement stone,reduce the permeability of cement stone,and then reduce the intrusion resistance of CO_(2),and the formed resin cement slurry composite system has good corrosion resistance.

关 键 词：水泥石 改性树脂 固化剂 力学性能 抗腐蚀性能 

分 类 号：TE256.66[石油与天然气工程—油气井工程]