By studying on tight sandstone gas reservoir in Linxing area of Ordos Basin,it was found that the shale content of the reservoir is generally higher in this area.In order to calculate the gas content accurately,the Archie formula is not applicable which based on the pure sandstone.Aiming at the characteristics of the higher shale content of tight sandstone in Linxing area of the Ordos Basin,the key parameters of the gas content calculation method were analyzed and a correlation chart of the parameters was established.Accordingly a reliable method for calculating the gas content of mud tight sandstone was put forward in the final.Based on the formula of Indonesia,this method has a more accurate analysis on the effect of shale content in the tight sandstone,and the higher the shale content,the higher veracity of this method.Taking the 14 wells in Linxing area of the Ordos Basin as an example,the gas content of the sandstone with different shale contents were calculated,and the results showed that this method is more accurate than the traditional Archie formula and Indonesia formula.%通过对鄂尔多斯盆地临兴地区致密砂岩气藏进行研究,发现该区砂岩储层泥质含量普遍较高.而建立在纯砂岩基础之上的阿尔奇公式并不适用准确计算该类泥质含量较高地区中致密砂岩中的含气量.针对鄂尔多斯盆地东缘临兴地区致密砂岩泥质含量较高的特点,对含气量计算方法中各项关键参数进行分析,建立了计算各项参数的模型,进而提出了一套较为可靠的含泥质致密砂岩含气量计算方法.该方法在印尼公式基础上,更为精确地考虑了致密砂岩中泥质含量对含气量计算结果的影响,且泥质含量越高,该方法的可靠性越高.选取了鄂尔多斯盆地东缘临兴地区14口不同泥质含量的砂岩数据进行了含气量的计算,结果表明该方法计算的含气量结果较阿尔奇公式和印尼公式更为准确.
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