深井大尺寸套管固井技术在塔里木油田的应用

Application of large size casing cementing technology about deep wells in Tarim Oilfield

孙万兴 高飞 欧阳斌 刘振通 吴永超 张小建

SUN Wanxing GAO Fei OUYANG Bin LIU Zhentong WU Yongchao ZHANG Xiaojian

渤海钻探工程有限公司第一固井分公司，河北任丘　062550 渤海钻探工程有限公司钻井技术服务分公司，天津　300280 渤海钻探工程有限公司油气井测试分公司，河北廊坊　065000

NO.1 Cementing Company of Bohai Drilling Engineering Co. Ltd., CNPC, Renqiu 062550, China Drilling Technology & Service Branch of Bohai Drilling Engineering Co. Ltd., CNPC, Tianjin 300280, China Well Testing Branch of Bohai Drilling Engineering Co. Ltd., CNPC, Langfang 065000, China

克深2-1-14 井是塔里木盆地库车坳陷克拉苏构造带上的一口重点天然气开发井，完钻井深为5 541 m。该井地质结构复杂，第四系、新近系和古近系上段苏维依组为易吸水膨胀坍塌的泥岩段，同时存在砾石及砂岩层，为低压易漏地层。针对该地层特点和工程现状，二开采用?365.13 mm + ?339.7 mm 大尺寸组合套管，下至深度5 541 m，同时应用了低黏切先导钻井液、黏性加重隔离液和双凝水泥浆的体系，完成了该深井、大尺寸套管、大井眼环空的固井施工作业，施工后电测检验封固质量优。该井的成功经验可为今后同类型井的固井施工提供有益的借鉴。

Well KES2-1-14 is a key development well for natural gas located on Crassus belt of Kuqa depression of Tarim Basin and drilled well depth of 5 541 m. The well had complex geological structure. The Quaternary, Neogene and Paleogene section on Suweiyi Formation is a section of mudstone which is susceptive to swelling and collapse when contacted with water. There are also conglomerate and sandstone layers, which are low pressure leaking formations. In view of the formation characteristics and engineering Status, the ?365.13 mm + ?339.7 mm large size combination casing was used for 2nd spud and was run in to a depth of 5 541 m; Meanwhile, a low-viscosity lead drilling fluid, viscosity weighted spacer and separable setting cement slurry were used to finish cementing of large size casing in this deep well with large wellbore annulus. Electric log showed very good cementation quality. The casing setting depth in this well is 5 541 m, its bare weight is 617 t and cumulative injected and displaced volume is 1 167.6 m3, which are three new records in cement job at home.

10.13639/j.odpt.2015.05.014