跟管钻进在大口径页岩气井浅部复杂地层中的应用 ——以黔水地1井导管段为例

Application of simultaneous casing drilling to large bore shale gas well drilling in shallow complex formation: A case of conductor drilling for the Qianshuidi-1 well

摘要:

桂中-南盘江地区的浅部地层裂隙、溶洞发育，破碎带多，井漏、井垮严重，泥浆护壁钻进成孔难度较大。针对该类地层，首次将跟管钻进技术引入大口径页岩气井钻探——黔水地1井导管段钻探，有效地解决了该井导管段的成孔难等问题。并通过系统总结该技术在黔水地1井工程施工中的实际应用情况，为今后类似工程提供了宝贵经验和建议。

Abstract:

There are a lot of fractures， karst caves and fractures in the shallow strata in the Guizhong-Nanpanjiang region， thus causing serious lost circulation and borehole wall collapse. It was difficult for hole drilling with conventional mud protection. The simultaneous casing drilling process has been applied to large diameter shale gas well drilling for the first time， which effectively solved the drilling problem with the conductor hole. The practical application of the process in the Qianshuidi-1 well is systematically summarized and can serve as valuable reference for similar projects in the future．