DBPapers
DOI: 10.5593/SGEM2016/B13/S06.112

PETROPHYSICAL CHARACTERISATION OF THE MIOCENE SANDSTONES OF THE CARPATHIAN FOREDEEP (SOUTH-EAST POLAND)

A. Pstrucha, A. Krzyzak, G. Machowski
Tuesday 6 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-57-5 / ISSN 1314-2704, June 28 - July 6, 2016, Book1 Vol. 3, 891-898 pp

ABSTRACT
Analysis of the pore space properties represents a foundation of petrophysical characterization of reservoir rocks. It essentially enables a proper evaluation of the capacity of rocks to store and transfer reservoir fluids. The study concerns mercury injection capillary pressure, high-resolution X-ray computed microtomography, low field nuclear magnetic resonance and gas permeability measurements on Miocene sandstones. The rock core samples were taken from the S-3 well from the depth interval of 1769 – 1925 meters. The well is located in the Miocene Carpathian Foredeep in south-east Poland, which represents a prospective area for the occurrence of hydrocarbon resources. Results of the applied laboratory methods enabled detailed analysis of the pore space and estimation of porosity and permeability. Analyzed sandstone samples reveal the porous type of the reservoir space, characterized by the high proportion of mesopores (0,5 – 2,5 μm), high values of effective porosity and low values of permeability. The data obtained from the applied methods exhibit relatively strong correlation. The presented results show that the Miocene sandstones represent a hybrid type of reservoir rocks, with features typical of both conventional and unconventional reservoir deposits.

Keywords: Miocene, petrophysical parameters, nuclear magnetic resonance, mercury porosimetry