Search results for: shale rock

• Wettability of shale rock as an indicator of fracturing fluid composition

  Publication

  • K. Księżniak
  • A. Rogala
  • J. Hupka

  - Physicochemical Problems of Mineral Processing - Year 2015

  Shales have become one of the main unconventional gas resources in the world. However, physicochemical properties of rocks are still at the center of research. There have been conducted major researches in wettability of shales by fluids and advances in understanding and control of shale rock wettability. Also influence of interfacial phenomena on a production capacity of reservoirs have been made. The aim of this study is to find...

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• ROCK MECHANICS AND ROCK ENGINEERING

  Journals

  ISSN: 0723-2632 , eISSN: 1434-453X

• The shape of an ROC curve in the evaluation of credit scoring models

  Publication

  • B. Kochański

  - STATISTICS IN TRANSITION - Year 2024

  The AUC, i.e. the area under the receiver operating characteristic (ROC) curve, or its scaled version, the Gini coefficient, are the standard measures of the discriminatory power of credit scoring. Using binormal ROC curve models, we show how the shape of the curves affects the economic benefits of using scoring models with the same AUC. Based on the results, we propose that the shape parameter of the fitted ROC curve is reported...

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• Simulations of hydro-fracking in rock mass at meso-scale using fully coupled DEM/CFD approach

  Publication

  • M. Krzaczek
  • M. Nitka
  • J. Kozicki
  • J. Tejchman

  - Acta Geotechnica - Year 2020

  The paper deals with two-dimensional (2D) numerical modelling of hydro-fracking (hydraulic fracturing) in rocks at the meso-scale. A numerical model was developed to characterize the properties of fluid-driven fractures in rocks by combining the discrete element method (DEM) with computational fluid dynamics (CFD). The mechanical behaviour of the rock matrix was simulated with DEM and the behaviour of the fracturing fluid flow...

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• OIL SHALE

  Journals

  ISSN: 0208-189X , eISSN: 1736-7492

• Muscle strength and endurance in high-level rock climbers

  Publication

  • R. Rokowski
  • M. Michailov
  • M. Maciejczyk
  • M. Więcek
  • J. Szymura
  • P. Draga
  • P. Trendafilov
  • Z. Szygula
  • M. Wiecek

  - Sports Biomechanics - Year 2024

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• Kerogen to bitumen transformation with respect to host rock environment

  Publication

  • A. Małachowska
  • M. Mastalerz
  • J. Hupka

  - Year 2018

  Research focuses on analyzing the role of rock constituents in kerogen transformation. It includes mineral and organic matter characterization, kerogen and bitumen isolation, quantification, and determination of the critical factors of transformation ratio concerning generating mobile versus less mobile hydrocarbons. The results indicate that the ratio mainly depends on the distribution and type of kerogen in the basin, and secondly...

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• Rock Art Research

  Journals

  ISSN: 0813-0426

• Rock and Soil Mechanics

  Journals

  ISSN: 1000-7598

• Rock Music Studies

  Journals

  ISSN: 1940-1159 , eISSN: 1940-1167