向斜煤层气井表层岩溶地层空气钻井技术适应性研究  

Research on the Adaptability of Air Drilling Technology in Ground Surface Karst Strata of Synclinal Coal Bed Methane Wells

作　　者：郑鹏宇 向刚 赵凌云 Zheng Pengyu;Xiang Gang;Zhao Lingyun(Key Laboratory for Unconventional Natural Gas Evaluation and Development in Complex Structural Areas of the Ministry of Natural Resources,Guizhou Guiyang 550009;Guizhou Provincial Oil and Gas Exploration and Development Engineering Research Institute,Guizhou Guiyang 550009)

机构地区：[1]自然资源部复杂构造区非常规天然气评价与开发重点实验室,贵州贵阳550009 [2]贵州省油气勘查开发工程研究院,贵州贵阳550009

出　　处：《山东煤炭科技》2023年第9期183-185,共3页Shandong Coal Science and Technology

基　　金：贵州省地质勘查基金项目“贵州龙潭组煤层气重点层段优选和高效勘查开发关键技术研究与示范”(208-9912-JBN-UTS0);贵州省地质勘查基金项目“毕节试验区煤层气资源调查评价与开发技术研究”(52000021MGQSE7S7K6PRP)。

摘　　要：针对贵州岩溶地层钻井过程容易恶性漏失问题,通过一开采用空气钻井技术,并用表层套管封堵漏失层位,降低二开钻进过程的漏失风险。通过丛式井组应用对比分析,岩溶地层一开采用空气钻井技术后,机械钻速比常规水力钻井技术有显著提升,减少煤层暴露时间,降低井径扩大率,有效保证固井质量。Aiming at the problem of malignant leakage during the drilling process in karst strata in Guizhou,the first spud adopts air drilling technology and uses surface casing to seal the lost layer,reducing the risk of leakage during the second spud drilling process.Through comparative analysis of the application of cluster well groups,it is found that after adopting air drilling technology in the karst strata first spud,the mechanical drilling speed significantly improves compared to conventional hydraulic drilling technology,reduces the exposure time of coal seams,reduces the expansion rate of wellbore diameter,and effectively ensures the quality of well cementation.

关 键 词：煤层气井 岩溶地层 地层漏失 空气钻井 

分 类 号：TE243[石油与天然气工程—油气井工程]