摘要
根据天然气和水在测井响应上的差异,发展了一系列的识别天然气的有效方法。由于天然气和水的弛豫时间和扩散系数的差异,可以利用差谱分析法(DSM)和移谱分析法(SSM)来识别天然气。本文详细叙述了各种不同测井天然气识别方法以及其适用条件,同时针对密度测井受井眼环境影响较大这一问题,提出了视水层中子孔隙度法来识别天然气,并列举了几个气层识别实例,分析表明效果良好。
By different response characters to water/oil layer in logging curves,many effective methods have been established to identify natural gas.Because natural gas and water have different relaxation time and diffusion coefficient,we can use DSM and SSM to identify them.In this paper,different identifying methods and their application conditions are analyzed.At the same time,In view of the fact that density logging is more sensitive to borehole condition,the method of apparent water layer neutron porosity is presented,and several examples of practical application in oilfield are cited which have good results.
出处
《新疆石油天然气》
CAS
2007年第2期12-16,39,共6页
Xinjiang Oil & Gas
关键词
天然气
重叠
差谱分析法
视水层中子孔隙度
识别
natural gas
overlap
differential spectrum method
apparent water layer neutron porosity
identify
