Fracture operation is one of the important manners for exploitation of CBM and to obtain enough information is very critical for fracturing treatment in a coal bed methane formation.
压裂是煤层气开采的重要手段之一，而压裂前获取煤层相关地层参数，对压裂设计及压裂施工十分必要。
The echometer was used to monitor the change of the annular water level in the coal- bed methane(CBM)wells production, which could decrease pressure stably and continuously.
在煤层气井排采过程中，通常用回声仪来监测环空液面变化，通过控制液面下降速度来实现稳定、连续降压。
The development of Coal bed Methane (CBM) has made greater progress in recent years.
近年来，煤层气开发取得了较大进展。
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