连续管逐簇喷射环空压裂工艺现场应用  

Field Application of Annulus Fracturing Process for Each Cluster of Coiled Tubing

作　　者：谢鹏 向刚 卢秀德[1] 宋丹[1] 刘佳林 XIE Peng;XIANG Gang;LU Xiude;SONG Dan;LIU Jialin(Downhole Service Company,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Chengdu 610213,China)

机构地区：[1]川庆钻探工程有限公司井下作业公司,成都610213

出　　处：《焊管》2021年第1期19-24,共6页Welded Pipe and Tube

基　　金：国家科技重大专项“储层改造关键技术及装备课题6:深层连续管作业技术与装备——子课题5:页岩气/致密油连续管储层改造配套作业技术”(项目编号2016ZX05023006-005)。

摘　　要：针对四川盆地页岩气井常规压裂改造井筒易变形而无法使用电缆桥塞分段压裂、施工工序复杂、施工周期长等问题,采用了一种连续油管喷砂射孔逐簇环空加砂压裂的新工艺,简述了该工艺技术的原理和特点,并详细阐述了其在页岩气井的应用情况,分析了现场施工风险。指出该工艺施工效率高,避免了桥塞的使用,降低了成本,减少了套管变形带来的施工风险,但现场应用时会出现连续油管被砂埋、挤毁和刺穿等一系列施工风险。最后针对施工风险提出了相关指导建议。Due to casing easily deformed in conventional fracturing which lead to difficult to apply segmented fracturing of cable bridge plug,complicated procedure and long work period in shale gas wells in the Sichuan Basin,the technology of abrasive perforating with coiled tubing and annulus fracturing for each cluster was employed.The principle and characteristics of this technology are described,and its application in shale gas wells is described in detail,and the site construction risk is analyzed.It is pointed out that this technology has high construction efficiency,avoids the use of bridge plug,reduces the cost and reduces the construction risk caused by casing deformation.However,a series of construction risks such as sand burying and puncture of coiled tubing will occur when the technology is applied in the field.Finally,relevant guidance and suggestions are put forward for the construction risk.

关 键 词：连续油管 喷砂射孔 环空压裂 页岩气 风险分析 

分 类 号：TE355[石油与天然气工程—油气田开发工程]