武威盆地黑山区块煤层气U型井技术研究

Coalbed methane U type well technology in Heishan block of Wuwei basin

基于黑山区块煤层地质及力学特征,对比常规煤层气多分支水平井开采技术。该区煤层气适合U型井钻井技术进行开发。通过黑山区现场地质数据分析,在煤层的主井眼钻进过程中,宜采用清水钻井或者气体钻井、泡沫钻井等欠平衡钻井。采用简单的相交连接方式和适宜的定向钻井贯通方式,运用定向地质导向钻井技术增加对接准确性。将水平井计算模型与流体摩阻的计算结合起来,软件计算得水平段最优长度。

based on the geological and mechanical characteristics of coal seam in montenegro block,compared with conventional coal bed methane multi-branch horizontal well mining technology,the coal bed methane in this area is suitable for U type well drilling technology.