川渝地区浅表层破碎带漏垮塌治理技术及应用  

Application of Cement Slurry to Solve Mud Lossfor Shallow Fracture Zone in Sichuan and Chongqing

作　　者：肖京男 初永涛 丁士东 周仕明 张晋凯 XIAO Jingnan;CHU Yongtao;DING Shidong;ZHOU Shiming;ZHANG Jinkai(SINOPEC Research Institute of Petroleum Engineer Co.,Ltd.,Beijing 102200,China)

机构地区：[1]中石化石油工程技术研究院有限公司,北京102200

出　　处：《科技和产业》2023年第9期204-209,共6页Science Technology and Industry

摘　　要：川渝地区浅表层破碎带溶洞发育,漏垮塌并存导致无法正常钻进,严重影响机械钻速,成为区域拦路虎。针对传统水泥塞密度高、滞留性差与溶洞漏失量大、难以填充的难题,利用泡沫密度低与压缩膨胀特性,开发超低密度泡沫水泥浆快干封堵体系,密度范围为0.7~1.0 g/cm~3,候凝时间短,24 h封堵强度高于2 MPa。建立氮气泡沫挤注封堵溶洞工艺方法,不仅提高了溶洞填充效果,而且起到了固结井壁的作用。现场应用5口井,封堵成功率为100%,一次性解决了漏、垮、塌并存的重大技术难题,一开钻完井周期缩短了72%,保证了后续优快钻进,为浅表层破碎带漏垮塌治理及同平台随钻堵漏提供了技术借鉴。Karst caves in the shallow fracture zone in Sichuan and Chongqing are developed.The problem of leakage and collapse is widespread,which seriously affects the ROP.In view of the problems that the traditional cement plug is difficult to stay and the karst cave is difficult to plug,an ultra low density foam cement slurry quick drying plugging system has been developed,with a density range of 0.7~1.0 g/cm 3,the thickening time is adjustable,and the 24 h plugging strength is higher than 2 MPa.The technology of nitrogen foam plugging has been successfully applied in five wells,and the plugging success rate was 100%.It not only improves the filling effect of Karst cave,but also consolidates the well wall.The major technical problems of leakage,collapse and collapse were solved at one time.The surface drilling period was shortened by 72%,ensuring the follow-up excellent and fast drilling,and providing a technical reference for the treatment of leakage and collapse in the shallow fracture zone.

关 键 词：喀斯特 漏失 钻井堵漏 泡沫水泥浆 

分 类 号：TE256[石油与天然气工程—油气井工程]