Geometric and fractal characterization of pore systems in the Upper Triassic dolomites based on image processing techniques (example from Žumberak Mts, NW Croatia)

Znanstveni rad - Izvorni znanstveni rad

• Autor: Ivica Pavičić
• Autor: Zlatko Briševac https://orcid.org/0000-0001-7810-8255
• Autor: Anja Vrbaški
• Autor: Tonći Grgasović
• Autor: Željko Duić https://orcid.org/0000-0002-5077-5985
• Autor: Deni Šijak https://orcid.org/0000-0003-3834-6034
• Autor: Ivan Dragičević
• Autorova ustanova: Hrvatski geološki institut
• Autorova ustanova: Sveučilište u Zagrebu; Rudarsko-geološko-naftni fakultet; (Zavod za geologiju i geološko inženjerstvo)
• Autorova ustanova: Sveučilište u Zagrebu; Rudarsko-geološko-naftni fakultet; (Zavod za matematiku, informatiku i nacrtnu geometriju)
• Autorova ustanova: Sveučilište u Zagrebu; Rudarsko-geološko-naftni fakultet; (Zavod za rudarstvo i geotehniku)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Geologija
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Interdisciplinarne prirodne znanosti
• Znanstveno / umjetničko područje, polje i grana: TEHNIČKE ZNANOSTI; Rudarstvo, nafta i geološko inženjerstvo

Sažetak (engleski)

Karst aquifers are important sources of thermal and groundwater in many parts of the world, such as the Alpine–Dinaric–Carpathian region in Europe. The Upper Triassic dolomites are regionally recognized thermal and groundwater aquifers but also hydrocarbon reservoirs. They are characterized by predominantly fractured porosity, but the actual share of depositional and diagenetic porosity is rarely investigated. In this research, we presented the geometric characterization of the measured microporosity of the Upper Triassic dolomites of the Žumberak Mts (Croatia), through thin-section image processing and particle analysis techniques. Pore parameters were analyzed on microphotographs of impregnated thin sections in scale. A total of 2267 pores were isolated and analyzed. The following parameters were analyzed: pore area, pore perimeter, circularity, aspect ratio (AR), roundness, solidity, Feret AR, compactness, and fractal dimension. Furthermore, porosity was calculated based on the pore portion in each image. The effective porosity on rock samples was determined using saturation and buoyancy techniques as an accompanying research method. We analyzed distributions of each parameter, their correlation, and most of the parameters are characterized by an asymmetric or asymmetric normal distribution. Parameters that quantify pore irregularities have similar distributions, and their values indicate the high complexity of the pore geometry, which can significantly impact permeability.

• Ključne riječi (engleski): Upper Triassic; dolomites; porosity; image processing; fractal dimension
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Sustainability
• Brojčani podaci: vol. 13, br. 14, 7668
• e-ISSN: 2071-1050
• DOI: https://doi.org/10.3390/su13147668
• URN:NBN: urn:nbn:hr:169:857763
• Datum objave publikacije: 2021-07-09
• Projekt: Šifra: UIP-2019-04-1218; Naziv (hrvatski): Multidisciplinarni pristup izradi konceptualnih modela hidrotermalnih sustava; Naziv (engleski): Multidisciplinary Approach to Conceptual Modelling of Hydrothermal Systems; Kratica: HyTheC; Voditelj: Staša Borović; Pravna nadležnost: Hrvatska; Financijer: HRZZ; Linija financiranja: UIP
• URL dokumenta: https://www.mdpi.com/2071-1050/13/14/7668
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2021-09-10 12:22:20