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通过对大量老井资料的对比分析，在建立柴达木盆地第四系气藏气层识别标准的同时，阐述了第四系中低产层的形成机理和四性特征，通过较大规模的试气验证，不仅证实了上述识别标准和气层解释结果的可靠性，同时也使柴达木盆地的天然气储量规模跨上了一个新的台阶，进一步印证了钻井液影响疏松地层测井环境及测井资料的研究结论，为开展特殊地质条件下的钻井液配制和钻井工艺研究，测井系列选择和解释方法研究提供了依据。

Well Logging Distinguishing and Test of Gas Well Verifying of Moderate-and-Low

This article sets up the criterion for distin guishing gas bearing formation in Quarternary by analyzing quantities of old well materials, and presents formation mecha nism and characteristics of four property of moderate-and-low pay zone. Through test of gas well verifying in a large scope we not only prove distinguishing criterion and the reliability of explaining gas pay zone, but also make a great leap in natural gas reservoirs in Caidam Basin. Furtherly, research conclusions of drilling mud influence on well-logging environments and well-logging materials of loose stuff are proved. All of this set a foundation for compound of drilling mud, researches of drilling tech nique, selection of well-logging serials and explaining methods.