国产测井系列浅气层识别技术

针对浅气层的测井响应特征及老井测井资料较少、资料刻度不统一的情况，综合利用已有的普通电法测井、声波测井及中子伽马测井资料，提取了识别天然气层的声波时差相对比值、中子伽马归一化值及电阻率相对比值等特征参数。在此基础上，应用交会图技术和数理统计方法建立了有效快速直观显示浅气层的标准和方法，编制了相应的解释软件，对２个地区近２０口井的资料进行了处理，解释结果与试油资料吻合较好。

Technique for Identifying Shallow Gas Layer with Domestic Logging Suite

During the exploration & production of shallow gas layer in old & gas region,there are only log data from conventional electrical logging, acoustic logging and neutron logging without standard calibration for identifying gas zone. In view of what mentioned above, characteristic parameters such as the relative ratio of acoustic transit time,normalized neutron gamma log and relative ratio of resistivity are extracted from the limited log data. Based on these parameters,cross plot technique and mathematical statistics analysis are used to establish norms and methods for effectively and visually identifying shallow gas zone. Data from more than 20 wells in two areas are processed with the technique. Log interpretation results are better.