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发表于 2008-11-6 13:56:17
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转帖一下,介绍了数种NTG计算方法
在NTG的生成上,不同的人以及不同的数据采用的方法存在着一定的差异性,一般来说,有以下几种实现的方案:
1 可以通过岩石物理属性体的上下限截断值来实现,根据该区块对于有效储层的储层物性界限来卡,如NTG=IF(POR>0.15 AND SO>0.5,1,0)
2 根据解释的砂泥岩剖面以及求取的岩相属性体来实现,并充分考虑油水关系以及储层分布.
等
Petrel help "N/G indicates the percentage of a particular interval which is potential reservoir. On a log scale it is a discrete property, at any one depth in a well the sequence is either reservoir or non reservoir. It is useful to generate this as a discrete log in Petrel so that it can be easily edited in the well correlation panel. However, after upscaling it should be a continuous log referring to the percentage of potential reservoir in each grid cell, e.g. 0.5 for interbedded sand and shale, 0.9 for sand with little shale."
设定上下限值,写个if语句就可以,如
NTG=IF(porosity>=xx and Perm>=xx,1,0)
xx代表上下限值 |
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