X-ray micro-CT imaging is becoming an integral part of rock characterization processes. Large data size, user bias, and accuracy of the results are some of the challenges associated with analyzing micro-CT images of rock samples.
In this article, the PerGeos Digital Rock Analysis software is demonstrated to analyze the full micro-CT dataset of a Berea sandstone mini plug. The analysis is done in blocks using a PerGeos recipe (i.e. a macro) and a block-processing script. The results are then merged together to form a whole analyzed image. To remove user bias from the analysis, the semi-automated watershed technique is used for segmentation. To improve the accuracy of the results the pore-grain boundaries are selected and removed from the seeds image before applying the watershed segmentation transform. The results of segmentation are demonstrated in the document. The porosity of the sample is calculated to be 20.5 %.