含气与含水砂岩的共同特征是零炮检距的振幅P都为负。
The gas-bearing sandstone and water-bearing sandstone are characterized by negative P value of zero offset.
通过实验室试验，定量分析了含水砂岩组分，研究了其烘干、吸水随时间变化规律。
In this experiment component of water-bearing sandstone is quantitatively analyzed, and time relationship between drying and water suction of sandstone is also studied.
对于砂岩储层，含气砂岩的声阻抗比含油和含水砂岩的声阻抗低，利用这种差异可以直接识别储层中气体。
For sandstone reservoir, the acoustic impedance of gas-bearing sandstone is lower than that of oil - and water-bearing sandstone, gas in reservoir may be directly recognized by using this difference.
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