煤层气开发U型井施工技术及增产措施试验研究——以寺河煤矿15号煤2014ZX-U-05V/H井组为例

Construction technologies and stimulation of U-shape well for CBM development ——with 2014ZX-U-05V/H well of coal 15 in Si He Mine as an example

煤矿区煤层气地面高效开发具有资源、安全、环保等多重效应。针对沁水盆地15号煤储层煤层气开发地质条件特点,提出并试验了地面U型井开发方案,钻成了第一口带分支的U型井,研究实践了新的增产措施,取得了良好产气效果,日产气量超过了2.0×104 m3,为区域内15号煤层的煤层气地面高效开发提供了新的技术途径。介绍了试验井组的工程概况、井身结构设计、施工技术及完井工艺等,对同类型井组的实施具有重要借鉴作用。

Ground efficient construction techniques of coalbed methane has multi-effect on resources, security and environmental protection. In the coal mining area, exploration and utilization of CBM is beneficial for economy, safety and environment protection. Based on geological condition characteristics of CBM development of coal 15 in Qinshui basin, the U-shape well development project was put forward, which sucessfully guide the first multi-lateral U-shape well construct. As a result the stimulation increase the output to more than 2.0×104 cubic metres gas per day, and also provides a new way for the CBM ground efficient development of coal 15 in this area.This study introduced the general situation, well structure design, construction technology and well completion of test well group, which is important to the same type well group construction.