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本文叙述的是根据声波测井资料分段确定孔隙度和渗透率的一种简单而有效的方法。此方法包括把测井曲线分成若干同质段,然后按同一质域的声波走时值分成组,用岩芯数据对每组进行声波走时向孔隙度的变换,同样建立孔隙度向渗透率的变换。 尽管所提出的方法并不涉及任何地质信息的输入,但根据分段数据分组变换取得的孔隙度和渗透率比较接近岩芯数据,而且按岩相是可以解释的。与此明显不同的是,用全部数据进行整体变换效果很差,会使储集性能产生错误的结果。 分段办法既简单又快速,在岩相资料不易得到的时候,对储集性能作初步的评价是适宜的。
This article describes a simple but effective way to segment porosity and permeability based on acoustic log data. The method includes dividing the well logging curve into several homogeneous sections and then dividing the well logs into groups according to the travel time values of acoustic waves in the same domain, and performing the time-to-porosity transformation of each group with the core data, and also establishing the transformation of porosity to permeability . Although the proposed method does not involve the input of any geological information, the porosity and permeability obtained from the subsegmental data packet transformation are relatively close to the core data and can be explained in terms of lithofacies. In marked contrast, the overall transformation with all data is ineffective, resulting in erroneous results on reservoir performance. The staging method is both simple and fast, and it is appropriate to make a preliminary assessment of reservoir properties when lithofacies data are not readily available.