关键词: 煤层气, 仿树形水平井, 造穴, 连通, 固壁

Abstract: CBM imitation tree horizontal well is a new type of horizontal wells in the ordinary naked eye multi-branch horizontal wells on the basis of innovation, through the main branch build multi-branch horizontal wells on a stable seam roof or floor, the branch sidetracking the main branch into the coal seam, and then drill a number of veins branching from the branch side. A main branch with several branches and a number of branches of each branch vein, constitute the main long-term stability and support the monitoring and maintenance of the reentrant imitation tree is a multi-branch horizontal wells. This paper describes the types of system design methods well type, as well as build a cave roof shale and communication technology, solid-wall technology, well trajectory control technology, floating point sidetracking technology, composite carrying rock technology. Imitation tree smooth implementation of horizontal wells for coalbed methane development to provide a new and efficient means.