脉冲中子全谱饱和度测井在储层评价中的应用

Application of Pulsed-neutron Spectral Saturation Logging to Reservoir Evaluation

脉冲中子全谱饱和度测井技术(以下简称全谱饱和度测井)能够测量碳氧比能谱、氯能谱、中子寿命、活化氧、自然伽马、井温等各种曲线,具有独立分析岩性剖面、计算套后孔隙度、划分储层和评价储层含油性等功能。在老井复查中进行全谱饱和度测井,可以弥补一些井完井资料的缺失,寻找潜在油气层,为进一步挖掘剩余油提供技术支持。从全谱饱和度测井技术的解释方法原理出发,结合裸眼井解释结论判断全谱饱和度测井资料在裸眼井资料不全或不准的情况,探索准确解释的可行性。通过实验井对比,取得较好的应用效果。

The pulse neutron spectral saturation logging technology can measure the C/O ratio energy spectrum,chlorine energy spectrum,natural gamma,neutron lifetime,activated oxygen,temperature and other curves,with independent analysis of lithology profile,calculation of reservoir porosity and zonation and evaluation of the reservoirs.PSSL saturation measurement in the old well,on the one hand,can make up for the lack of some data of well completion,can find potential oil and gas layer,so provides technical support for further finding remaining oil.In this paper,the full spectrum method is used to explain the technical principle.Combined with open hole data,it can explain full spectrum data in open hole to prove the feasibility of accurate interpretation.And through the contrast experiments,it has good application effect.