关键词: 偏心连通, 洞穴完井, 偏心验证, 水平对接井

Abstract: According to cave collapses and passes straight through When the horizontal well and the vertical well is connected,which will block the gas production channel and will affect subsequent operations such as sand bailer, lower pump and workover, etc. The cave is rules,and not easy to collapse with 6 blade forging and milling tools and zxq-145 reaming tool; Drilling time is strictly controlled before and after connection, in order to avoid the caving caused by the disturbance of coal seam caused by bottom hole pressure fluctuation and drill string vibration. By eccentric connected theory analysis, on the basis of construction practice, optimizing drilling parameters, calculating the offset, borehole trajectory control, which effectively eliminate instrument error;There is implemented A set of CBM Horizontally- Remote intersected Well in Panzhuang block by near-bit rotating electromagnetic ranging guidance technology. The distance between the wellheads of the two Wells is 764m, and the eccentric connection is realized at the depth of 1099.37m. This technology is the further improvement of the horizontal well communication technology of coalbed methane.