塔里木山前构造克深7井盐间高压盐水处理技术  

High Pressure Salt Water Treatment Technology of Well Keshen7 in Foothill Structural Zone of Tarim

作　　者：尹达[1] 叶艳[2] 李磊[1] 梁红军[1] 王平全[3] 

机构地区：[1]塔里木油田分公司 [2]中国石油大学(北京) [3]西南石油大学

出　　处：《钻井液与完井液》2012年第5期6-8,95,共3页Drilling Fluid & Completion Fluid

摘　　要：克深7井井深为8 023 m,盐层埋深为7 211 m,采用高密度全油基钻井液钻开盐层,钻至井深7 764 m处钻遇盐间高压盐水层,压井液密度达2.55 g/cm3,在实施压井作业过程中发生了严重漏失。在采用专用油基钻井液配套堵漏材料和桥塞堵漏未成功后,采用了水基堵漏浆与油基钻井液混合的沉淀隔离新工艺,在堵漏材料中引入了国外高强度承压材料,将其与膨胀效果好的核桃壳等材料复配使用,堵漏成功。应用结果表明,常规的桥浆堵漏和油基钻井液配套的堵漏材料均不能应对克深7井这种异常复杂地层,沉淀隔离新工艺配合适当比例的多种堵漏材料,对处理高压盐水层压井及井漏等复杂情况实用可行。The well Keshen7 is a deep exploration well located in foothill structural zone,with the salt bed formation depth of 7,211 m.In this well,the high density whole oil base drilling fluid system is used to drill through salt bed formation,it is encountered high pressure salt water in depth of 7,764 m,and the density of kill fluid is 2.55 g/cm 3,however,a severe lost circulation occurs while killing well.In this situation,a kind of deposit isolation lost circulation control technology is applied that is cooperated with water-based lost circulation control mud and oil-based drilling fluid.The application shows that single normal LCM used either in water or oil based drilling fluid can not deal with the complex formations in well Keshen7,however,the deposit isolation lost circulation control technology can be used here successfully.

关 键 词：地下井喷 井漏 压井 高压盐水层 沉淀隔离堵漏 高密度油基钻井液 水基堵漏浆 山前地区 

分 类 号：TE282[石油与天然气工程—油气井工程]