塔里木盆地油气地质调查新乌地1井钻探工艺技术

新乌地1井地处塔里木盆地西北缘乌什西构造带,断裂发育,且缺乏邻井参考资料,区域地质调查程度较浅,所钻遇地层复杂,漏失、破碎、缩径等现象时常发生,给钻探施工带来巨大挑战。针对该井井身结构设计缺乏依据、地层极端复杂、事故处理难度大等问题,研发应用了超前裸眼钻进、深厚覆盖层堵漏、井内事故处理和复杂地层冲洗液护壁等多项关键技术,解决了上述各项难题,降低了施工成本,形成了一套适宜于塔里木盆地西南与东南坳陷区复杂地层的小口径油气调查井钻探技术体系,为今后该地区同类钻探施工提供借鉴。

Drilling technology of well Xinwudi1 in oil and gas geological survey of Tarim Basin

Well Xinwudi1 is located in Wushixi tectonic belt on the northwestern margin of Tarim Basin. The fault was well developed, and the reference materials from adjacent wells were lacking. The regional geological survey is not thorough and the formation is extremely complex, with leakage, fragmentation and diameter reduction, which brings great challenges to drilling construction. In order to solve the problems, such as the lack of basis for well structure design, the extremely complex formation and the difficulty of handling accidents, several key technologies such as super-pilot open hole drilling, deep overburden plugging, serious in-well accident handling and complex formation drilling fluid retaining wall have been applied. These technologies have helped reduce the construction cost. The drilling technology system has been developed and is suitable for the small-diameter oil and gas survey well with complex strata in the southwestern and southeastern depression of Tarim Basin. It will provide reference for similar drilling construction in this area in the future.