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A fractured metamorphic HC reservoir is studied in the basement of the Pannonian Basin. In the complex evaluation petrology, structural geology, rock mechanics, Computer Tomography, fracture network modelling and seismic attribute modelling are compiled. Our result suggest that the most intensely fractured, most porous zones belong to the amphibolite bodies and to shear zones between neighbouring metamorhic units. Large gneiss blocks are essentially impermeable.