摘要
元坝1井是部署在四川盆地川东北巴中低缓构造带元坝岩性圈闭的一口重点区域探井,设计井深6 920 m,实际完钻井深7 170 m,全井平均机械钻速2.0 m/h。针对该井地层古老、硬度大、研磨性强、可钻性差、机械钻速低、漏层多、漏失严重、海相和陆相地层安全窗口密度都较低,特别是在海相裂缝性气层喷漏共存等问题,通过深入研究分析,成功使用了空气钻井技术、气液转换技术、承压堵漏技术、抑制性聚磺封堵性防塌钻井液体系,优选了高效PDC钻头,配合螺杆、涡轮钻具钻进,大幅度提高了钻井速度,保证了工程质量,为元坝地区的勘探开发提供了技术保证。
Well Yuanba-1 is a key exploration well located in Sichuan Basin in northeastern Sichuan Palestinian gentle structure belt in Yuanba structure, its planned depth is 6 920 m and the actual finished depth is 7 170 m. The average penetration rate is 2.0 m/h. There exist a lot of technical challenges in drilling this formation, including deep buried depth, high hardness, strong abrasiveness, weak drillability, low penetrating speed, large number of thief zones, serious lost circulation, terrestrial and marine strata formation and low-density window security, particularly in the marine fractured gas layer, leakage and blowout co-existence, etc. The drilling speed and wellbore quality was improved significantly by using air drilling, gas-liquid conversion technique, mud loss control under pressure, anti-sloughing drilling fluid systems, high-performance PDC bit along with turbo drill, etc. It provides technical basis for developing Yuanba area.
出处
《石油钻探技术》
CAS
北大核心
2009年第2期94-99,共6页
Petroleum Drilling Techniques
关键词
气体钻井
钻头
钻井液
承压能力
元坝1井
gas drilling
bit
drilling fluid
resistance to pressure
Well Yuanba-1
