Novel approach in analysis of fractures in reservoir rocks by digital image processing of computed microtomography and microresistivity test results

Łukasz Dominik Kaczmarek , Tomasz Wejrzanowski

Abstract

Fractures are present in reservoirs of hydrocarbons, as well as geothermal ones. They are fundamental for enhancing the permeability of rocks. Evaluation of rock core samples by high-resolution computed microtomography (μCT) and the use of well logging based on microresistivity geophysical probe tests (i.e. XRMI or FMI) make it possible to calculate fractures ratios in two scales: micro (size of micrometers) and macro (size of centimeters). This study concerns the use of these two methods, focusing on analysis of microresistivity borehole images and X-ray images of rock samples from hydrocarbon deposits in northern Poland. The common stage for μCT and XRMI is digital image processing. The results obtained, i.e. resistivity images of fractures in the borehole wall and internal structures of samples are used to calculate the share of fractures in the reservoir rocks. Furthermore, μCT testing enables characterization of the fractures connectivity based on 3-D numerical models. The key stage in the presented methodology is the comparison of the fractures ratio for the purpose of analyzing trends in size changes. Through its ability to distinguish fractures, this methodology can enhance the localization of sweet spots and determination of rock permeability.
Author Łukasz Dominik Kaczmarek - University of Warsaw (UW)
Łukasz Dominik Kaczmarek,,
-
, Tomasz Wejrzanowski (FMSE / DMD)
Tomasz Wejrzanowski,,
- Division of Materials Design
Pages143-150
Publication size in sheets0.5
Book 16th International Multidisciplinary Scientific GeoConference SGEM 2016, Oil and gas exploration, Conference Proceedings, Book 1, International Multidisciplinary Scientific GeoConference & EXPO SGEM, vol. 4, 2016, Sofia, STEF92 Technology Ltd., ISBN 978-619-7105-80-3
Keywords in Englishfractures, digital image processing, X-ray microtomography, microresistivity, Poland
DOIDOI:10.5593/SGEM2016/HB14/S01.019
URL https://www.sgem.org/sgemlib/spip.php?article8754
Languageen angielski
Not used for evaluationyes
Score (nominal)0
Publication indicators Scopus Citations = 1; WoS Citations = 0; GS Citations = 1.0
Citation count*1 (2020-09-03)
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