CAJ | 학술논문

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5541 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5541 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。
극심2-1-14정시탑리목분지고차요함극랍소구조대상적일구중점천연기개발정，완찬정심위5541 m。해정지질결구복잡，제사계、신근계화고근계상단소유의조위역흡수팽창담탑적니암단，동시존재력석급사암층，위저압역루지층。침대해지층특점화공정현상，이개채용?365.13 mm +?339.7 mm대척촌조합투관，하지심도5541 m，동시응용료저점절선도찬정액、점성가중격리액화쌍응수니장적체계，완성료해심정、대척촌투관、대정안배공적고정시공작업，시공후전측검험봉고질량우。해정적성공경험가위금후동류형정적고정시공제공유익적차감。
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 engineeringStatus, 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 lfuid, viscosity weighted spacer and separable setting cement slurry were used to ifnish 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.