环保性纳米硅酸镁锂/纤维素/明胶复合凝胶的制备及堵漏性能  

Preparation of Environmentally Friendly Nano Lithium Magnesium Silicate-Cellulose-Gelatin Composite Gel and Study on its Ability to Control Mud Losses

作　　者：范宇 唐宜家 夏连彬 王锐 黄桃 王建威 FAN Yu;TANG Yijia;XIA Lianbin;WANG Rui;HUANG Tao;WANG Jianwei(Engineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company,Chengdu,Sichuan 610031;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500)

机构地区：[1]中国石油西南油气田分公司工程技术研究院,成都610031 [2]西南石油大学化学化工学院,成都610500

出　　处：《钻井液与完井液》2025年第2期209-216,共8页Drilling Fluid & Completion Fluid

基　　金：中国石油西南油气田分公司科学研究与技术开发项目“深层页岩气防漏堵漏及提高地层承压能力技术研究”(20230302-18)。

摘　　要：在全球石油勘探开发都在严格推行环境保护法规的背景下,研制出一款环保且性能优秀的堵漏剂无疑是应对钻井漏层的高效解决方案。通过溶胶-凝胶法将纳米硅酸镁锂(nLMS)\羟丙基甲基纤维素(HPMC)\明胶(Gel)以固定的质量比例进行高温共混,nLMS粒子在高温下更均匀地分散在混合体系中,其高表面积促进了与Gel\HPMC基质地强黏附性,三者通过氢键与物理纠缠相互作用。利用nLMS和HPMC、Gel之间的物理化学作用,制备了具有高度交联网络结构的水凝胶,最后利用真空冷冻干燥技术,制备了纳米硅酸镁锂/纤维素/明胶复合凝胶(nLMS-HPMC-Gel)颗粒。通过红外分析,紫外分析,热重分析,X射线衍射,高端流变仪等手段对复合凝胶(nLMS-HPMC-Gel)进行表征,同时,对复合凝胶在水基钻井液中的流变性能,封堵性能,承压性能进行了测试。结果表明:nLMS-HPMC-Gel该种凝胶具有良好的降滤失性,堵漏性,承压性,互配性。In the context of the global oil exploration and development in the strict implementation of environmental protection regulations,the development of an environmentally friendly and excellent performance of the plugging agent is undoubtedly a highly effective solution to deal with the leakage of drilling wellsIn sol-gel reactions,nano-lithium magnesium silicate(nLMS),hydroxypropyl methyl cellulose(HPMC)and gelatin(Gel)are blended together in a fixed mass ratio.nLMS particles at high temperatures can disperse more evenly in the blend system,and their high specific area promotes their strong adhesion on the surfaces of the Gel\HPMC substrate,these three substances interact with each other through hydrogen bonds and physical entanglement.Through physical-chemical interaction between nLMS and HPMC as well as nLMS and Gel,a hydrogel with highly crosslinked network structure was developed.The hydrogel was then processed by vacuum freeze drying method to produce nLMSCellulose-Gelatin particles which were characterized by IR analysis,UV analysis,thermogravimetric analysis,XRD analysis and rheometer measurement.The nLMS-Cellulose-Gelatin particles were measured for their rheological property,plugging performance and pressure bearing capacity in drilling fluids.The results show that nLMS-Cellulose-Gelatin particles have good filtration control property,mud loss control capability,pressure bearing capacity and compatibility with other drilling fluid additives.

关 键 词：硅酸镁锂 羟丙基甲基纤维素 明胶 高温共混 凝胶 水基钻井液 防漏堵漏 

分 类 号：TE282[石油与天然气工程—油气井工程]