ABSTRACT
X-ray computed tomography (CT scan) is primarily used for distinguishing planar structures in carbonate cores. In this method, cores are scanned prior to opening and layout, and therefore, the properties can be characterized before any damage due to core opening. Among these properties, fractures are of great importance. They strongly affect the reservoir behavior, from both static and dynamic point of view. In this chapter, all planar structures including lamination and layering, cross-beddings, reworked surfaces, compaction-related features (solution seams, stylolites) and various types of fractures (filled, closed, open, natural hydraulic, induced, tension gashes) are considered. Such as the facies and diagenesis chapter, the original and traced (interpreted) CT images are presented along with FMI, whole core, close-up and thin section photo. As porosity has strong effect on darkness of the image, the amount of porosity is also presented. The location of the desired feature is marked with arrows or lines and all features are described in the explanations. The reader can see how these structures are viewed when they intersect with CT slices.
