But it will fail to recognize the gas bearing bed buried deeper by the two methods as its porosity log feature is not obvious, especially when density porosity is lower than neutron porosity.
但是，对埋藏较深的气层而言，由于其孔隙度曲线特征并不明显，故用常规方法识别十分困难，特别是当密度孔隙低于中子孔隙度时，上述两方法识别气层均失败。
The main factors of influencing coal-bed gas production are permeability, thickness, and gas-bearing volume of the coal-bed.
影响煤层气产量的主要因素是煤层渗透率、煤层厚度及含气量。
The porosity and permeability of coal-bearing strata have important influence to the exhaust and mining of coal bed gas, but the production of coal bed gas is precondition of its richen.
煤系地层孔隙性和渗透率对煤层气的抽放、排采具有重要影响，但煤层气的生成却是其富集的先决条件。
With gas potential and gas productivity the influence of gas-bearing volume and permeability on production of coal-bed gas Wells will be reflected completely.
用产气潜能与产气能力将更全面地反映含气量及渗透率对煤层气井产量的影响。
Gas -bearing nature of coal bed is a basic factor of coal gas reservoir, and also the one of important bases on prospecting and exploitation decision of coal bed gas.
煤层含气性是煤层气成藏的一个基本要素，是煤层气勘探开发决策的重要依据之一。
In order to test the performance of bearing, the test-bed of gas-magnetic dynamic pressure bearing is designed and manufactured.
为了测试气磁复合动压轴承的性能，设计并搭建了气磁复合动压轴承测试试验台。
In order to test the performance of bearing, the test-bed of gas-magnetic dynamic pressure bearing is designed and manufactured.
为了测试气磁复合动压轴承的性能，设计并搭建了气磁复合动压轴承测试试验台。
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