适用于新疆沙排9组地层抗高温新型离子液体抑制剂及抑制机理  

Investigation of High-Temperature Resistant Ionic Liquid Inhibitors for Xinjiang ShapaiGroup 9 and Their Inhibition Mechanism

作　　者：高世峰 屈沅治 黄宏军 任晗 贾海东 刘敬平 贾寒[2] GAO Shifeng;QU Yuanzhi;HUANG Hongjun;REN Han;JIA Haidong;LIU jingping;JIA Han(CNPC Engineering Technology R&D Company Limited,Beijing 102206;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580)

机构地区：[1]中国石油集团工程技术研究院有限公司,北京102206 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《钻井液与完井液》2025年第1期66-73,共8页Drilling Fluid & Completion Fluid

基　　金：中国石油集团关键核心技术攻关项目“抗温240℃以上的环保井筒工作液新材料”(2020A-3913);中国石油集团前瞻性基础性战略性技术攻关课题“准噶尔和柴达木盆地复杂地层垮塌机理及强抑制封堵材料研发”(2021DJ4407);中国石油天然气集团公司直属院所基础科学研究和战略储备技术研究基金项目“聚合物类钻井液处理剂抗温抗盐机理与关键材料研发”(2021DQ03-15)。

摘　　要：借助X射线衍射、红外光谱、扫描电子显微镜和水接触角从多角度探明了新疆沙排9组储层岩性对井壁稳定的影响,并对3种典型离子液体(MOA、CP-DES、MM6)进行了抑制性能评价、抑制机理研究和应用效果分析。该组岩石黏土矿物含量高,且表面含有大量羟基,遇水极易膨胀。在3种离子液体抑制剂处理的岩样中,最低的线性膨胀率(21.2%),最高的滚动回收率(63.1%,180℃)以及钻井液体系良好的应用效果,表明共熔物类离子液体(CP-DES)最适宜作为新疆沙排9组地层的抑制剂。进一步研究发现,CP-DES能够通过氢键与黏土表面形成强相互作用,并进入黏土层间阻碍水的入侵。同时阳离子基团压缩黏土颗粒周围的扩散双电层,减弱颗粒间的静电排斥力,进而抑制了黏土矿物的水化膨胀。The effect of reservoir lithology on the stability of the wellbore in Xinjiang Shapai Group 9 was investigated from multiple perspectives via X-ray diffraction,infrared spectroscopy,scanning electron microscopy,and water contact angle.The inhibition performance,inhibition mechanism,and application of three typical ionic liquids(MOA,CP-DES,MM6)were evaluated.The rocks in this group have a high content of clay minerals and contain a large number of hydroxyl groups on their surfaces,which are highly susceptible to swelling with water.Among the samples treated by three ionic liquid inhibitors,the lowest linear swelling rate(21.2%),the highest hot-rolling recovery(63.1%,180℃),and the excellent application results of drilling fluid system indicate that deep eutectic solvent ionic liquid(CP-DES)is the most suitable inhibitor for the Xinjiang Shapai Group 9.Further studies revealed that CP-DES could form strong interactions with the clay surface through hydrogen bonding and enter the clay interlayer to hinder the intrusion of water.Meanwhile,the cationic groups could compress the electric double layer on the clay surfaces and weaken the electrostatic repulsion between the particles,which consequently inhibited the hydration swelling of the clay.

关 键 词：离子液体 页岩抑制剂 岩性分析 分子间相互作用 

分 类 号：TE254.4[石油与天然气工程—油气井工程]