地层元素测井中子-伽马谱解析方法的实际应用

本文利用地层元素测井中子伽马谱的解析理论和解析方法，对两个油田的四口井连续获取的中子伽马谱，用自行设计与研制的软件系统，进行连续处理，获得H、C、O、Si、Ca、Fe、Mg、Al的质量分数随井深的变化曲线。同时，获得新C/O和新Ca/Si比值随井深的变化曲线，即测井曲线。随之利用新C/O比值求得有关井段地层的含油饱和度及划分水淹等级，而且利用元素质量分数求得有关地层的矿物含量，接着求得地层密度、宏观俘获截面和渗透率等。

Applications of Analytic Method for Neutron-Gamma-Ray Spectra From Formation Elements

The analytic method for the neutron-gamma-ray spectra from formation elements logging are used for cotinuously treating the neutron-gamma-ray spectra acquired continuously in four wells of two oil fields. The changing curves with the well depth for the quality fractions of H,C,O,Si,Ca,Fe,Mg,Al and the new C/O, new Ca/Si values are obtained, i. e. the logging curves. The new C/O values are used to calulate for the oil saturability related well sections formations and the water hiding levels. The quality fractions of elements are used to calculate for the minerals contents, density, macroscopic capture cross sections as well as permeability in formations and so on.