摘要
盖南1井在二开1595～3250m井段存在低压漏层,在二开3385～3395m井段钻遇高压气层,在同一井段存在严重上漏下喷的问题。该井三开环空间隙非常小、井段长、压耗大,要求钻井液的黏度和切力较低,但在3435～3442m、3650～3665m井段钻遇高压气层,为能悬浮重晶石要求钻井液的黏度和切力较高。在钻进过程中,通过随钻堵漏和静止承压堵漏提高地层承压能力及使用加重胶液维护钻井液的性能解决了二开井段严重上漏下喷的问题,通过降低膨润土含量以及提高聚合物的含量降低钻井液流动阻力的方法解决了三开存在的钻井液黏度和切力问题。
There existed a low-pressure leakage layer from 1,595 m to 3,250 m in Gainan Well 1. During drilling the middle of the third member of Dongying formation, the high-pressure gas formation was encountered from 3,385 m to 3,395 m (2nd section of drilling operation), from 3,435 m to 3,442 m (3rd section of drilling operation) and from 3,650 m to 3,665 m (3rd section of drilling operation). During the process of the 2nd section of drilling operation, the problems of lost circulation in the upper section and blowout in the lower section were solved by the method of plugging while drilling and static pressure-bearing plugging to enhance pressure-bearing ability of the formation. During the process of the 3rd section of drilling operation, the problem of viscous shearing of the drilling fluid were solved by the method of decreasing the clay content of the drilling fluid and increasing the polymer content to reduce the flow resistance of the drilling fluid.
出处
《钻井液与完井液》
CAS
2010年第4期93-94,共2页
Drilling Fluid & Completion Fluid
关键词
气侵
井漏
堵漏
钻井液
Gas kick
Lost circulation
Plugging
Drilling fluid
