Description and classification of rock surfaces by means of laser profilometry and mathematical morphology

Młynarczuk, M.

doi:10.1016/j.ijrmms.2009.09.004

Cited by 45 publications

(16 citation statements)

References 39 publications

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“…X-ray CT can achieve wider field of view and very high resolution in 3D space (Ge et al, 2015). Despite the lower resolution in comparison with µxCT and SEM images, the thin section images have other advantages such as a wider range of view, saved time and cheaper availability for petrophysical studies, such as pore microstructure (Desbois et al, 2011;Rabbani et al, 2014a;Borazjani et al, 2016;Gundogar et al, 2016;Rabbani et al, 2016;Xiao et al, 2016), mineral recognition and classification (Hofmann et al, 2013;Asmussen et al, 2015;Izadi et al, 2015;Izadi et al, 2017b), specific surface area (Rabbani and Jamshidi, 2014;Rabbani et al, 2014b), elastic modulus (Arns et al, 2002;Dvorkin et al, 2011;Madonna et al, 2012;Saxena and Mavko, 2016), rock type determination (Mynarczuk, 2010;Mynarczuk et al, 2013;Ge et al, 2015;Mollajan et al, 2016), pore-grain analysis (Rabbani and Jamshidi, 2014;Rabbani et al, 2014b;Song et al, 2016), flowing property (Peng et al, 2016;Wang et al, 2016b). Using thin section images, the interconnected pore structure can be marked out visually as they are filled by color epoxy resin.…”

Section: Petrophysical Characterization Based On Thin Section Analysismentioning

confidence: 99%

Applications of digital core analysis and hydraulic flow units in petrophysical characterization

Chen

Zhou

2017

Adv. Geo-Energ. Res.

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Conventional petrophysical characterizations are often based on direct laboratory measurements. Although they provide accurate results, such measurements are time-consuming and limited by instrument and environment. What's more, in the georesource energy industry, availability and cuttings of core plugs are difficult. Because of these reasons, virtual digital core technology is of increasing interest due to its capability of characterizing rock samples without physical cores and experiments. Virtual digital core technology, also known as digital rock physics, is used to discover, understand and model relationships between material, fluid composition, rock microstructure and macro equivalent physical properties. Based on actual geological conditions, modern mathematical methods and imaging technology, the digital model of the core or porous media is created to carry out physical field numerical simulation. In this review, the methods for constructing digital porous media are introduced first, then the characterization of thin rock cross section and the capillary pressure curve using scanning electron microscope image under mixed wetting are presented. Finally, we summarize the hydraulic flow unit methods in petrophysical classification.Keywords: Digital core, porous media, petrophysical characterization, thin section, mercury injection capillary pressure.Citation: Chen, X., Zhou, Y. Applications of digital core analysis and hydraulic flow units in petrophysical characterization. Adv.

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Section: Petrophysical Characterization Based On Thin Section Analysismentioning

confidence: 99%

Applications of digital core analysis and hydraulic flow units in petrophysical characterization

Chen

Zhou

2017

Adv. Geo-Energ. Res.

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“…The authors used this as a basis for determining the parameters of content differentiation (Table 1). Due to the particular nature of the research, the stereological parameters of materials were not used, as their extraction would necessitate adopting different segmentation algorithms [20] for different rock types. Such an approach rules out their universal usability in relation to the construction of the proposed system.…”

Section: Determination Of the Characteristics Identifying Photographsmentioning

confidence: 99%

Search of visually similar microscopic rock images

Ładniak

Młynarczuk

2014

Comput Geosci

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The present paper discusses the essential tenets of the method whose purpose is to enable effective search of images of given rock in multimedia databases. The search is based exclusively on an image request, to which the system's response is a set of images presenting visually similar rocks. The images that constitute the basis of the discussed research had been registered with an optical microscope. The collection of images that were used in the process of performing measurements encompassed 5700 digital images presenting 19 rock types. The proposed method is based on the application of image analysis and artificial intelligence concepts. The very process of inference, in turn, makes use of the methods of data classification and grouping. In the paper, the authors demonstrate that these may turn out to be effective mathematical methods, successfully applied to the problem of image search, performed with imagings presenting rock textures. The discussed system concept, based on a feature space defined by the authors, successfully matches up images with the reference standard. The effectiveness rate of that process is very high (very often, it is 100 %). Failed classifications concern only the images which differ visually-in a considerable way-from the rest of the images within a given group. The proposed system concept is to facilitate the decisionmaking process involved in determining the similarity of investigated objects. In the opinion of the authors, it meets M. Ładniak ( ) · M. Młynarczuk Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, Cracow, M. Młynarczuk e-mail: mlynar@agh.edu.pl the requirements-and, as such, can be applied to the problem of searching for images in databases, searching discs in order to find images of given rocks and automatic information gain on the basis of video sequences, e.g., in order to find frames presenting particular rock structures.

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“…Various authors propose various types of such filtration -e.g. using the Fourier transform (Hocheng & Hsieh, 2004), the wavelet method (Chen et al, 1999), or morphological filters (Młynarczuk, 2010). The measurements discussed in this chapter were carried out according to the guidelines specified in the ISO 11562, and with a 2.5 mm Gaussian filter.…”

Section: Standard Iso Parametersmentioning

confidence: 99%

The Research into the Quality of Rock Surfaces Obtained by Abrasive Water Jet Cutting

Młynarczuk¹,

Skiba²,

Sitek³

et al. 2014

Archives of Mining Sciences

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In recent years, water jet cutting technology has been being used more and more often, in various domains of human activity. Its numerous applications include cutting different materials -among them, rock materials. The present paper discusses the results of the research that aimed at determining -in a quantitative manner -the way in which the water jet cutting parameters (such as the traverse speed of the head, and the distance between the high-pressure inlet of the water jet and the cut material) influence the quality of the processed surface. Additionally, the impact of these parameters on the surface of various materials was investigated. The materials used were three granites differing with respect to the size of grains. In the course of the research, the standard parameters defined by the ISO norms were analyzed. It was also proposed that variograms be used to analyze the quality of the cut surface.Keywords: water jet, rock cutting, surface quality, roughness, variogram Technologia cięcia strumieniem wodnym staje się w ostatnich latach coraz intensywniej wykorzystywana w różnych dziedzinach działalności człowieka. Jest ona wykorzystywana do obróbki różnorod-nych materiałów, również materiałów skalnych. W ramach badań analizowano trzy granity różniące się m.in. wielkościami ziarn, które były przecinane przy różnych prędkościach przesuwu głowicy z wlotem strumienia wodnego. Analizowano standardowe parametry zdefiniowane w normach ISO jak również zaproponowano wykorzystanie wariogramów do analizy jakości wyciętej powierzchni. W pracy opisano w sposób ilościowy zmiany jakości powierzchni skał ciętych strumieniem wodnym ze ścierniwem w zależności od prędkości przesuwu głowicy, jak również w zależności od odległości przecinanego fragmentu powierzchni od wlotu strumienia wodnego do materiału. Wyniki uzyskane w pomiarach wskazują też na wpływ wielkości uziarnienia skały na jakość otrzymanej powierzchni. Jest to szczególnie widoczne dla najmniej optymalnych parametrów cięcia strumieniem wodnym, czyli dla dużych prędkości cięcia i dla fragmentów powierzchni znacznie oddalonych od brzegu próbki. W badaniach wykazano, że przy W pracy opisano również możliwość zastosowania funkcji madogramu do analizy jakości obrabianej powierzchni. Przy wykorzystaniu tej funkcji można nie tylko potwierdzić rezultaty otrzymane na bazie parametrów zdefiniowanych w ISO, ale otrzymuje się bardziej dogłębny obraz ukształtowania badanej powierzchni.

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Description and classification of rock surfaces by means of laser profilometry and mathematical morphology

Cited by 45 publications

References 39 publications

Applications of digital core analysis and hydraulic flow units in petrophysical characterization

Applications of digital core analysis and hydraulic flow units in petrophysical characterization

Search of visually similar microscopic rock images

The Research into the Quality of Rock Surfaces Obtained by Abrasive Water Jet Cutting

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