摘要
自愈合凝胶是一类受损后能自行愈合形成接近整体凝胶强度的智能材料。通过系统介绍基于疏水、氢键和静电作用的物理自愈合凝胶和基于亚胺键、酰腙键和Diels-Alder反应的动态化学键作用的化学自愈合凝胶的研究进展,结合钻井液应用实践以及不同类型自愈合凝胶材料自身特性,总结了自愈合凝胶材料在钻井液防漏、堵漏、固壁和降滤失领域的应用前景。自愈合凝胶材料可作为随钻防漏和堵漏剂,进入井下高渗基质和裂缝后聚集堆积,自行愈合形成整体高强度凝胶封堵漏失通道;作为固壁材料可通过氢键、静电和黏滞作用吸附聚集在井筒壁面,愈合后形成高强度凝胶固壁层,封堵孔隙和微裂缝,强化井壁稳定性;作为降滤失材料可与黏土、聚合物协同作用,愈合后在井壁形成一层致密的高强度滤饼,降低钻井液滤失量。自愈合凝胶材料在钻井液领域的研究和应用将促进钻井液技术的智能化。
Self-healing gel is a kind of smart material that can heal itself after being damaged and have the gel strength close to the overall level.This paper systematically introduces the progress in research of the physical self-healing gel based on hydrophobic interaction,hydrogen bond and ionic bond actions and the chemical self-healing gel based on dynamic action of the chemical bonds including imine bond and acylhydrazone bond as well as Diels-Alder reaction;in combination with the application of drilling fluid and the characteristics of different types of self-healing gel,it summarizes the application prospects of self-healing gel in the lost circulation prevention and control,wellbore strengthening and fluid loss reduction of drilling fluid.The self-healing gel can be used as the lost circulation prevention and control material while drilling.After entering the downhole high-permeability matrix and fractures,it will accumulate,and heal itself to form an integral high-strength gel to plug leakage channels.As a wellbore-strengthening material,it can be absorbed and accumulated on the wall of wellbore by hydrogen bond,static electricity and viscous effect.After healing,it forms a high-strength gel layer,which plugs pores and micro-cracks,and strengthens the stability of sidewall.As a material for controlling fluid loss,it can cooperate with clay and polymers.A dense high-strength filter cake is formed on the side wall to reduce the filtration loss of drilling fluid.The research and application of self-healing gel in the field of drilling fluid will promote the intelligentization of drilling fluid technology.
作者
孙金声
赵震
白英睿
吕开河
王金堂
王韧
王晨烨
戴立瑶
Sun Jinsheng;Zhao Zhen;Bai Yingrui;Lü Kaihe;Wang Jintang;Wang Ren;Wang Chenye;Dai Liyao(School of Petroleum Engineering,China Uniuersily of Petroleum,Shandong Qingdao 266580,China;CNPC Engineering Technology R&D Corn puny Limited,Beijing 102206,China;Southern Marine Science and Engineering Guangdong Laboratory,Guangdong Guangzhou 523936,China)
出处
《石油学报》
EI
CAS
CSCD
北大核心
2020年第12期1706-1718,共13页
Acta Petrolei Sinica
基金
国家自然科学基金重大项目课题(No.51991361)
国家自然科学基金面上项目(No.52074327)
国家自然科学基金石油化工联合基金(A类)重点基金项目(U1762212)
中国石油天然气集团公司重大工程技术现场试验项目(2020F-45)
南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0501)资助。
关键词
智能自愈合凝胶
愈合机理
防漏堵漏
化学固壁
降滤失
intelligent self-healing gel
healing mechanism
lost circulation prevention and control
wellbore strengthening by chemical action
fluid loss reduction
