coal-bed gas well 煤层气井
Based on the low pressure of the coal bed gas well, the sand removal technology by mechanical sand fishing is put forward.
根据煤层气井的低压特点，提出了通过机械捞砂来清砂的技术。
Coal (rock) and gas outburst is one of intense natural disaster, is also a complicated and dynamical phenomenon, caused by stress, gas pressure of coal bed as well as coal structure.
煤(岩)与瓦斯突出是煤矿严重的自然灾害之一，且是一种复杂的动力现象，是地应力、煤层中的瓦斯压力和煤的结构力学性质综合作用的结果。
The gas produced from Qugu-1 Well in Linnan area proved that the main gas source rock was the coal bed of the Carboniferous-Permian System.
临南地区曲古1井产出的天然气证明是源自石炭系和二叠系煤岩。
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