As the CBM Wells are drilled using air.
由于煤层气井钻井用空气。
The influence of coal bed permeability and Wells' distance on productivity of CBM Wells are analyzed.
分析了煤层渗透率和煤层气井间距对煤层气井产能的影响。
Y445 series of bridge plugs were successfully applied in layer fracturing of CBM Wells and met the requirements.
Y445系列压裂桥塞在煤层气井分层压裂中的成功应用基本上达到了这一目的。
An all-round introduction is given mainly on experimental evaluations on the conductivity of hydraulic fracture in CBM Wells.
本文主要围绕煤层气井压裂裂缝导流能力实验评价展开介绍。
Occurrences and forms of hydraulic fractures in drilling wells are analyzed for extraction of coalbed methane(CBM). The determination basis of dips, strikes and shapes of the fractures are presented.
对钻井水力压裂开采煤层气时，所形成的裂缝产状和形态进行了理论分析。提出了裂缝倾角、走向和形状的确定依据。
For mining CBM effectively, directional CBM production Wells were drilled through the application of directional drilling.
为有效开采煤层气，应用定向钻进技术施工煤层气定向井。
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 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。
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