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本文叙述一种以分段声波测井资料为基础确定孔隙度和渗透率的简单有效的方法。该方法把测井曲线分成许多性质相同的段,再把这些段分成若干个组,每个组声波传播时间值范围相似。利用岩心资料建立每个组声波传播时间至孔隙度的转换关系。类似地再确定孔隙度至渗透率的转换关系。以分段资料为基础分段转换获得的孔隙度和渗透率与岩心资料相比十分吻合。这可以根据岩相来解释,尽管所提出的方法并未涉及任何地质信息的输入。截然相反,对于这些储层性质,根据全部数据得出的总的转换公式效果很差,而且会导致错误的结果分段法简便快速,在岩相信息难以得到的时候,该方法适宜于储层特性的初次评估。
This article describes a simple and efficient method for determining porosity and permeability based on sonic log data. This method divides the logging curve into many segments of the same nature, divides these segments into several groups, and each group has a similar range of acoustic propagation time values. Core data were used to establish the conversion of acoustic propagation time to porosity for each group. The conversion of porosity to permeability is similarly determined. The porosity and permeability derived from the staged transformation based on the staged data are in good agreement with the core data. This can be explained by lithofacies, although the proposed method does not involve the input of any geologic information. On the contrary, for these reservoir properties, the total conversion formula based on the total data is ineffective and results in a false result that the staging method is quick and easy. This method is suitable for reservoirs when lithofacies information is not available Initial assessment of characteristics.