煤层气大位移水平井关键性技术研究

Study on Key Technologies in CBM Extended Reach Horizontal Well

通过对煤层气大位移水平井钻井关键性技术进行研究,利用地质导向技术控制好二开轨迹和着陆点,为完成三开水平段打好基础。通过对水平段托压严重控制技术、水平段井壁稳定控制技术以及地质导向技术等的研究,确保水平段长、煤层钻遇率满足设计要求,进而解决煤层气大位移水平井钻井关键性技术难题。

Through the study on CBM extended reach horizontal well key technologies,using geosteering technology has controlled second spudding trajectory and landing point thus laid a solid foundation for third spudding horizontal segment.Through study on horizontal segment serious back-pressure control,horizontal segment wall stability control and geosteering technologies have ensured design requirements on horizontal segment length,coal seam intersection rate,thus solved CBM extended reach horizontal well drilling key technical hard nuts.