塔里木盆地柯坪地区新苏地1井冲洗液护壁堵漏工艺

Wall protection and leak-plugging with drilling fluid for Well Xinsudi-1 in Keping Area of Tarim Basin

摘要:

塔里木盆地柯坪地区地质调查井钻探工程项目新苏地1井，位于塔里木盆地阿瓦提凹陷沙井子构造带上，该构造带地层倾角大、胶结性差、破碎严重，井壁稳定性差。钻遇地层岩性主要为泥岩、砂岩、泥质粉砂岩、灰岩、白云岩、含泥云岩、石英片岩等，存在多处垮塌和漏失井段。现场采用聚合物防塌冲洗液体系，较好地解决了地层破碎、坍塌掉块等复杂问题，该体系具有抑制性强、胶结性好，在整井的施工中取得了较好的护壁堵漏应用效果，保证了项目的顺利实施。

Abstract:

The geological survey drilling project in the Keping area of the Tarim Basin-Well Xinsudi1 is located on the Shajingzi tectonic belt of the Awati depression in the Tarim Basin. The structural belt is featured of a large inclination, poor cementation, serious breakage and the stability of the borehole wall is poor. The lithology encountered during drilling was mainly mudstone, sandstone, argillaceous siltstone, limestone, dolomite, mud-bearing dolomitic rock, quartz schist and so on. There were many collapses and circulation loss. Use of the polymer anti-collapse drilling fluid system on the site has solved the complex problems such as broken formation, collapse, falling stones. The system provided strong inhibition and good cementation, and achieved good performance in borehole wall protection leakage plugging, ensuring successful implementation of the project.