Some Useful Guidelines for Whole Core CT-Scanning for Petrophysical Applications

From the time CT-scanning was introduced in oil and gas industry, its use could be divided into SCAL routine type applications. The first involves flowing fluids through cores, whereas second scanning, mainly whole their native (preserved or unpreserved) state. For core CT-scanning, there has been a constant shift from qualitative to quantitative analysis. size of cores is ideal for scanning them with ‘converted’ medical CT-scanner but obtaining meaningful data requires more than just artifact-free images. In this paper, useful guidelines are offered extracting CT-scanning. Today’s fast, multi-slice CT-scanners generally provide sufficient image resolution most related However, they usually require some modifications equipment calibration procedures. Special solid phantoms matching density should used calibrating scanner at different X-ray energies. A set ‘standards’ necessary converting CT numbers Z eff (Effective Atomic numbers), which scanned under similar ‘environment’ as cores. Using pilot scans highly recommended every tube reduce uncertainties. dual energy it important take exact same locations, selecting right pair corresponding tables. processing, include aligning last slices largest region-of-interest, quality controlling each slice assigning depths before bulk . Additional information provided industrial have both advantages disadvantages. Guidelines such ones mentioned above allow imaging number Such were successfully porosity determination, heterogeneity quantification, lithology dual-energy based mineralogy detection, density-based micro-imaging, core-log correlations depth matching, fracture characterization, formation damage evaluation, many others. Several examples included paper. Adherence strict helps artifact-free, on that can improve our understanding rocks. This paper demonstrates least 10 applications along proper engineers geoscientists.