为了查明沁水盆地南部地区含气饱和度的空间分布规律及其控制因素,采用类比法、内插法和综合分析等方法对该地区3煤层和15煤层进行了研究。结果表明:3煤层含气饱和度一般为20.60%～128.01%,平均70.53%,变化范围较大;15煤层含气饱和度一般为11.09%～132.42%,平均59.47%,分布较为集中;3煤层含气饱和度总体上高于15煤层;以此将沁水盆地南部划分为3个区,其中,位于研究区尉迟以北的Ⅰ区含气饱和度最高,位于寺头断层以东、樊庄以西和Ⅰ区以北的Ⅱ区块次之,而位于研究区东部和南部的Ⅲ区块最差。指出含气饱和度与煤层气含量呈正相关关系,与煤储层埋深具有良好的负相关关系,煤厚、煤阶及煤储层所处的水文地质条件亦对含气饱和度有一定的影响。

In order to clarify the space distribution law and the control factors of the gas content saturation in southern part of Qinshui Basin, the analogical metho d, the interpolation method, the comprehensive analysis method and other method were applied to the study on the No.3 seam and No. 15 seam.The results showed tha t the gas content saturation of No.3 seam would generally be 20.60% to 128.01%, the average saturation would be 70.53% and the variation scope would large.The gas content saturation of No.15 seam would generally be 11.09% to 132.42%, the average saturation would be 59.47% and the distribution would be concentrated.Generally the gas content saturation of No.3 seam would be higher than No. 15 seam.Therefore the southern part of the Qinshui Basin could be divided into three blocks.Among th e three blocks, the block I in the north part of the Yuchi in the study zone would be highest in the gas content saturation.The block I in the north part of the block I a nd the east of the Sitou fault and the west of Fanzhuang would be second high in the gas content saturation and the block in the east part and south part of the study zone would be low in the gas content saturation.The paper pointed out that the gas content saturation and the coal bed methane content would be in a positive related r elationship, the gas content saturation and the seam deposit depth would be in a negative related relationship. The hydrological conditions of the seam thickness, coal「 ank and seam deposit location would have a certain influence to the gas content saturation.

国家油气重大专项资助项目(2008ZX05034-04)；国家重点基础研究发展计划(973计划)资助项目(2009CB219605)；