致密低压气藏纳米微乳液防水锁剂研究与应用  

Research and Application of Nano-microemulsion Waterproof Locking Agent for Dense Low-pressure Gas Reservoirs

作　　者：陈志豪 孙文安 陈海涌[4] 苏国辉[4] 胡名家 赵众从[1,2] CHEN Zhi-hao;SUN Wen-an;CHEN Hai-yong;SU Guo-hu;HU Ming-jia;ZHAO Zhong-cong(School of Petroleum Engineering,Yangtze University,Wuhan Hubei 430100,China;Leak Resistance&Sealing Technology Research Department National Engineering Laboratory of Petroleum Drilling Technology,Key Laboratory of Drilling and Production Engineering for Oil and Gas,Wuhan Hubei 430100,China;Hubei Feilihua Quartz Glass Co.,Ltd.,Jingzhou Hubei 434001,China;Engineering Technology Management Department of PetroChina Changqing Oil Field Branch,Xi'an Shaanxi 710018,China;Xi'an Changqing Chemical Group Co.,Ltd.,PetroChina Changqing Oil Field Branch Company,Xi'an Shaanxi 710018,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430100 [2]油气钻井技术国家工程实验室防漏堵漏研究室,油气钻采工程湖北省重点实验室,湖北武汉430100 [3]湖北菲利华石英玻璃股份有限公司,湖北荆州43400 [4]中国石油长庆油田分公司工程技术管理部,陕西西安710018 [5]中国石油长庆油田分公司西安长庆化工集团有限公司,陕西西安710018

出　　处：《当代化工》2023年第9期2158-2162,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金面上项目,调频调幅水力振荡强化酸液解堵特性与调控机制(项目编号:52174017)。

摘　　要：针对低渗储层易受到水锁伤害的问题,合成了一种含氟纳米微乳液防水锁剂M916。相较于传统防水锁剂,M916具有小尺寸和核壳结构特征。该结构能够降低M916在近井地带的吸附,实现深部防水锁。实验结果表明:M916的尺寸约为20nm,可通过纳米级孔喉,改善岩石表面润湿性,达到中性润湿,能同时降低水锁对支撑裂缝及储层基质的伤害。此外,M916与一体化压裂液的配伍性良好,在一体化压裂液中添加0.3%纳米微乳液防水锁剂,施工后见气返排率最低,见气时间最短,试气产量最高,体现了良好的应用前景。A fluorine-containing nanoemulsion waterproof locking agent M916 was synthesized to address the vulnerability of low-permeability reservoirs to water locking injury,which had small size and core-shell structure compared with conventional waterproof locking agents.This structure can reduce the adsorption of M916 in the near-well zone and realize deep waterproof locking.Experimental results showed that M916 with the size of about 20 nm could improve rock surface wettability and achieve neutral wettability through nanoscale pore throats,which could simultaneously reduce the damage of water lock to the supporting fracture and reservoir matrix.In addition,M916 had good compatibility with the integrated fracturing fluid,and the addition of 0.3%nano-microemulsion water locking agent to the integrated fracturing fluid had the lowest gas rejection rate,the shortest time to see gas,and the highest test gas production after construction,reflecting a good application prospect.

关 键 词：纳米微乳液 防水锁 核壳结构 小尺寸 

分 类 号：TE39[石油与天然气工程—油气田开发工程]