The composition of clay minerals is the main cause generating low-resistivity gas zone.
粘土矿物成份是造成气层电阻率低的主要原因。
Long cementing section and low well temperature are main features of well-cementing of shallow gas zone.
水泥封固段长、井温低，是浅层气固井的主要特点。
Steam zone or gas zone identification with elastic waves is the interest of the poroelasticity application.
利用声波（或地震波）进行地下蒸汽和含气识别是孔隙弹性波动理论研究的应用方向之一。
Different basin has different depth for main oil generating zone, so for main gas generating zone (dry gas zone).
不同盆地有不同深度的生油主带，因而也有不同深度范围生气主带(干气带)。
Therefore, efficient gas suction is technically determined by seeking fracture aisles for gas movement and gas zone of enrichment.
因此，寻找瓦斯运移的裂隙通道和瓦斯富集区，实施有效的瓦斯抽放工程是实现高效瓦斯抽放的技术关键。
It has proved that this novel system is of good effect for shallow gas zone in well-cementing and gas breakthrough has been effectively controlled.
现场初步试验证明，该套水泥浆体系对于浅层气固井具有较好的效果，有效地控制了气窜现象的发生。
Using the gas zone seismic reflection character incorporated with drilled Wells to predict its lateral distribution, we have obtained better predicting effects.
利用气层地震反射特征结合已知钻井进行气层横向预测，取得了较好的实际效果。
The method for recognizing gas zone with PND logging data is introduced, which is to overlap the counting rates of a near detector and a far one to recognize gas zone based on certain scale.
介绍了利用PND测井资料进行气层识别的方法，即利用近探测器计数率和远探测器计数率以一定比例进行重叠的方法识别气层。
The method for recognizing gas zone with PND logging data is introduced, which is to overlap the counting rates of a near detector and a far one to recognize gas zone based on certain scale.
介绍了利用PND测井资料进行气层识别的方法，即利用近探测器计数率和远探测器计数率以一定比例进行重叠的方法识别气层。
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