沁水地区煤层气水平对接多分支井钻井工艺研究

针对沁水地区煤层气储层的地质特点及水平对接多分支井的施工技术难点，结合2012ZX-SP-01井组的钻井方案，介绍了排采井和工程井的井身结构、井眼轨迹优化、悬空侧钻，以及运用方位伽马判断钻头与煤层相对位置等关键技术。实钻井眼轨迹及后期排采效果表明，采用这一系列技术，能够保证水平对接多分支井的顺利实施，形成了较为成熟的煤层气水平对接多分支井钻井工艺，并取得了良好的排采效果。

Study on CBM Horizontally Butted Multi-branch Well Drilling Technology in Qinshui Block

According to the geological characteristics of CBM reservoir in Qinshui region and the technical difficulties in horizontally butted multi-branch wells construction, and combined with the drilling scheme of 2012 ZX-SP-01 well group, this paper introduces the key technologies about the well bore structure of drainage well and engineering well, wellbore trajectory optimization and suspended sidetracking, as well as the determination of the bit position and azimuth to coalbed using azimuth gamma. The real drilling trajectory and the late drainage effects show that by this series of technologies, the successful horizontally butted multi-branch wells construction can be ensured to form mature drilling technology of CBM horizontally butted multi-branch wells for good results.