煤层气L型水平井精准着陆技术研究

Research on precision landing technology of L-type horizontal well of coalbed methane

为提高煤层气L型水平井二开着陆准确度,在二开主井眼轨迹钻进至井斜70°时稳斜30m换小钻头施工小导眼,通过导眼揭穿的煤层数据结合精准着陆实时控制技术,来提高二开着陆准确度。最后通过实验验证:该方法在煤层气水平井精准着陆方面切实可行,提高了成井率和煤层钻遇率。

In order to improve the accuracy of double-opening and landing in the L-type coalbed methane horizontal well,when the track of the double-opening main well is drilled to the borehole inclination of 70°,a small guide hole is constructed by changing a small bit at a steady inclination of 30 meters.The accuracy of double-opening and landing is improved by combining the data of the coal seam exposed with the precision landing real-time control technology.Finally,it is verified by experiments that this method is feasible in precise landing of horizontal Wells of coalbed methane,and the well completion rate and coal seam drilling encounter rate are improved.