在松辽盆地十屋断陷八屋气田 ,由于气田水的矿化度低 ,使得利用电阻率曲线不能将气层与水层区分开。为了解决这个问题 ,作者依据中子测井的“挖掘效应”原理 ,提出一种识别气、水层的新方法 :首先 ,采用声波和中子孔隙度之间的差值合成一种新的曲线——声波中子合成曲线 ;然后 ,利用自然伽马曲线等划分出砂岩储层段 ;最后 ,利用所合成的声波中子合成曲线进行判别 ,凡大于零者为气层 ,小于零则为水层 Due to the low salinity of water in the gas field, the resistivity curve can not distinguish the gas layer from the water layer in the Badawu gas field in the Shiwu Fault Depression, Songliao Basin. In order to solve this problem, the author put forward a new method to identify gas and water layer based on the “digging effect” principle of neutron log: First, a new curve is synthesized by the difference between acoustic wave and neutron porosity - sonic neutron synthesis curve; then, the natural gamma ray curve is used to divide the sandstone reservoir section; finally, the synthesized sonic neutron synthesis curve is used to discriminate, where the gas zone is greater than zero and less than zero is water Floor