应用CT成像技术研究岩心孔隙度分布特征

清楚地识别岩心内部孔隙度分布特征，并对其进行定量描述，有助于深入研究岩心的渗流特性。应用CT成像技术，通过对干岩心和饱和地层水岩心扫描，重建了岩心不同扫描层面、沿某正交切面以及三维孔隙度分布图。应用孔隙度频率分布和累积频率分布曲线得到了岩心孔隙度分布的统计特征。将岩心孔隙度划分为“层面级”和“岩心级”两个级别，选用7种参数对岩心孔隙度分布的集中趋势、离散程度和分布形态进行表征。研究实例表明，同一岩心不同扫描层面孔隙度分布存在明显差异，其集中程度、离散程度和分布形态均有所不同。采用这7种表征参数可精细刻画岩心孔隙度分布特征。

Study of Porosity Distribution Features Using X-Ray CT

Recognizing core's porosity distribution feature clearly and characterizing it quantitatively is very important when studying core sample's seepage feature.By scanning dry core and the core saturated with formation water, the porosity distribution features of each scanning slice and the whole core were obtained, and the porosity distribution images of each slice, orthogonal and three dimensional were reconstructed.Statistical features of core porosity distribution could be derived from frequency distributio...