DOI: 10.5176/2251-3353_GEOS16.31
Authors: Łukasz Kaczmarek, Tomasz Wejrzanowski
Abstract: Fractures, like other texture features, is the factor which has a direct impact on oil and gas exploitation. Using well logging (i.e. XRMI) based on microresistivity and analyzing rock core samples by the computed microtomography, especially for indicating fractures, allow for characterization of the rock formation. The presentation concerns the use of these two methods by means of the analysis of microresistivity borehole images and X-ray images of rock samples from the Polish hydrocarbon deposits located in the northern part of the country. The common stage for XRMI and µCT is digital images processing. Obtained results, i.e. resistivity images of fractures in borehole wall and samples internal structures enable for calculation of fractures share in the reservoir rocks. Furthermore, µCT testing enables characterization of the fractures connectivity based on 3-D numerical models. The key step in presented methodology is fractures fraction comparison in order to analyze trends of change. Due to possibilities of fractures distinguish, this methodology can enhanced localization of sweet spots and determination of rock permeability.
Keywords: fractures, digital image processing, X-ray microtomography, microresistivity, Poland
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