摘要
近年来,核磁共振测量技术在石油工业中的应用越来越广泛,越来越受到重视。核磁共振测量是利用氢核在已知磁场中的核磁共振现象来探测地层孔隙与流体特征的一种方法。对于气藏而言,天然气的含氢指数低,直接影响着核磁共振测量结果。对此进行了相应的实验研究,其结果表明,天然气的含氢指数随压力增加而增大,随温度增加而减小,并与二者呈很好的线性关系,该结论对天然气储集层核磁共振测量的可行性评价具有一定的指导。在此基础上,探讨了核磁共振测井和地面低磁场条件下分析气层的方法,为应用核磁共振技术评价分析气层提供了参考。
In recent years,NMR measuring technology has been widely used in petroleum industry and more and more atten- tion has been paid to the technology.NMR measurement is a kind of methods that is mainly to adopt NMR phenomena in known magnetic field to detect formation porosity and fluid features.For natural gas reservoir,hydrogen bearing index is low and this is directly influencing NMR measuring results.The corresponding experimental research was con- ducted to the issue,it was shown by the results that the hy- drogen bearing index in natural gas increases and decreases as the pressure increases and decreases,it presents very good linear relationship.The conclusion can guide the feasi- bility evaluation to NMR measurement of natural gas reser- voir.On this basis,the authors discussed gas layer analy- zing method under the condition of NMR logging and sur- face low magnetic field,which provided references to evalu- ate and analyze gas layers by using NMR technology.
出处
《录井工程》
2008年第3期9-11,15,共4页
Mud Logging Engineering
关键词
核磁共振
气藏
含氢指数
温度
压力
方法
NMR
gas reservoir
hydrogen bearing index
temperature
pressure
method
