由于我国煤层气储层具有渗透率低、压力低的特点,直井煤层控制面积小,产量低,钻单支水平井不利于后期的排水降压作业,所以现在煤层气开发多采用羽状水平井,羽状水平井需要工艺井与排采井之间的连通。两井连通需要对两井距离、方位偏差、新的靶点坐标、南北坐标、东西坐标等进行精确测量,找出新的靶点,然后对定向井进行定向指导,确保成功连通。%Due to the CBM reservoir with the characteristics of low permeability and pressure in our country, direct well coal has small control area as well as low yield. Single-branch horizontal well is not conductive to drainage and pressure lowering in the later period. Therefore, multi-branch horizontal wells which need con- nection between technology wells and drainage wells are widely used in CBM development. It requires accurate measurement of distance, azimuth deviation, new target coordinates and geographic coordinates when connect- ing two wells. After the new target is set, guidance should be for directional wells to ensure successful connec- tivity.
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