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Acta Geologica Hungarica
Authors: Tamás Földes, Gizella B. Árgyelán, Péter Bogner, Imre Repa, Balázs Kiss, and Kinga Hips

This paper summarizes the benefits of non-destructive core measurements by medical Computer Tomograph (CT) in integrated 3D reservoir characterization.  A direct relationship exists between CT measurements and petrography, conventional petrophysical analysis and well logs. Based on CT measurements the internal structure of core samples, and the geometry of framework constituents, porosity type and pore size distribution, as well as fracturing, can be described. There is a close connection between distribution of the Hounsfield Unit of CT measurements and pore size distribution detected by conventional petrophysical analysis. Calculation of effective porosity from petroleum saturation experiments provides a new way to determine the porosity of the whole core sample. Beside the description of reservoir parameters, the results of CT measurements can be extended over the surrounding area of the well. By matching the cylinder maps of CT to FMI images and other well logs the original position of the core samples can be reconstructed. Applying high-tech CT measurements in 3D reservoir characterization and modeling of fluid migration significantly reduces the exploration and production risks.

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