摘要
常规堵漏材料通常较难兼顾可形变和高承压的结构特质,因此粒级匹配和承压堵漏效果较差。现有形状记忆堵漏材料虽然可在激活温度下形变,实现裂缝自适应封堵,但存在激活温度低、承压强度不足等问题,难以应对深层地质条件下严苛的温压环境。针对这些问题,以环氧树脂单体(E51)、固化剂三乙烯四胺(TETA)与聚醚胺(DP)、丙烯酸酯共聚物微球(PM)为原料,研制了具备激活温度高、形状记忆性能好的发泡树脂材料(SMFM),评价了SMFM的承压堵漏性能和强化固壁效果。结果表明,在E51、TETA、DP、PM质量比为0.05∶0.02∶0.02∶1.00的条件下制备的SMFM具有较好的回复性能,回复率为92.9%,玻璃化转变温度为97℃,回复温度为130℃。堵漏剂配方为基浆+5%SMFM时,承压能力可达10.3MPa,对天然裂缝性漏失具有良好的堵漏效果。SMFM通过形状的变化,能自适应匹配裂缝宽度进入裂缝,达到激活温度后,由片状材料或椭圆微球膨胀为块状材料或圆形微球,在裂缝中迅速发生架桥,膨胀承压、填充封堵,协同形成致密封堵层,减少地下漏失,强化井壁。利用高激活温度形状记忆发泡材料配制的堵漏液可应用于高温深井裂缝性漏失堵漏。
Conventional plugging materials are often difficult to balance the structural characteristics of deformability and high pressure,resulting in poor particle size matching and pressure sealing effect.Although existing shape memory plugging materials can deform at activation temperature and achieve adaptive sealing of cracks,they have problems such as low activation temperature and insufficient compressive strength,making it difficult to cope with harsh temperature and pressure environments in deep geological conditions.In response to these issues,a foaming resin material(SMFM)with high activation temperature and good shape memory performance was developed by using epoxy resin monomer(E51),curing agent triethylenetetramine(TETA)and polyetheramine(DP),and acrylic copolymer microspheres(PM)as raw materials.The pressure plugging performance and wall strengthening effect of SMFM were systematically evaluated.The results showed that when the mass ratio of E51,TETA,DP and PM was 0.05∶0.02∶0.02∶1.00,SMFM had good response performance,with a response rate of 92.9%.The glass transition temperature was 97℃,and then the recovery temperature was 130℃.Furthermore,the pressure bearing capacity could reach 10.3 MPa when the formula of plugging agent was made up of base paste and 5%SMFM,which had a good sealing effect on natural crack leakage.SMFM could adaptively match the crack width into the crack by changing its shape.After reaching activation temperature,it expanded from sheet materials or elliptical microspheres into block materials or circular microspheres,rapidly bridging in the crack,expanding under pressure,filling and sealing,and synergistically forming a sealing layer to reduce underground leakage and strengthen the wellbore.The plugging fluid formulated with high activation temperature shape memory foam material could be applied to high-temperature deep well crack leakage sealing.
作者
刘振东
李海斌
孙腾飞
刘莲英
吕建仁
LIU Zhendong;LI Haibin;SUN Tengfei;LIU Lianying;LYU Jianren(College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,P R of China;Drilling Fluid Technology Service Center,Sinopec Shengli Petroleum Engineering Company,Ltd.,Dongying,Shandong 257000,P R of China;School of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,P R of China)
出处
《油田化学》
北大核心
2025年第3期388-392,共5页
Oilfield Chemistry
基金
中国石化股份有限公司研究项目“钻井液用合成基础油及体系研究与应用”(项目编号P23115)。
关键词
形状记忆聚合物
发泡树脂
环氧树脂
堵漏
高激活温度
shape memory polymer
foam resin
epoxy resin
plugging
high activation temperature
作者简介
刘振东(1979-),男,高级工程师,中国石油大学(华东)化学工程与技术专业在读博士研究生(2017-),从事钻井液技术研发及推广工作,通信地址:257078山东省东营市德州路369号钻井液技术服务中心,E-mail:lzd7908@sina.com。
