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  • Preferred orientation and elastic anisotropy of illite-rich shale
    The illitic shale displays roughly transverse isotropy with C 11 close to C 22 and more than twice as strong as C 33 This method will lend itself to investigate complex polymineralic shales and quantify the contribution of preferred orientation to macroscopic anisotropy
  • Mechanical properties of shale-gas reservoir rocks Part 1: Static and . . .
    We present data on the gen-eral mechanical behavior of these rocks, the static dynamic elastic properties, and anisotropy to delineate the basic parameters that control gas-shale mechanical properties We also discuss these data in the context of theoretical models to better understand how com-position and fabric affect rock properties
  • Preferred orientation and elastic anisotropy of illite-rich shale
    Shales display significant seismic anisotropy that is attrib-uted in part to preferred orientation of constituent minerals This orientation pattern has been difficult to quantify because of the
  • Preferred orientations and anisotropy in shales: Callovo-Oxfordian . . .
    Opalinus shales from Benken and Mont Terri show strong alignment of illite-smectite, kaolinite, chlorite, and calcite This intrinsic contribution to anisotropy is consistent with macroscopic physical properties where anisotropy is caused both by the orientation distribution of crystallites and high-aspect-ratio pores
  • Mathematical modelling of anisotropy of illite-rich shale
    Effective media modelling is used to predict the elastic properties of the illite-rich shale and to identify the dominant contributions to the shale anisotropy We consider two principal reasons of the shale anisotropy: orientation of clay platelets and orientation of fluid-filled cracks
  • Linking preferred orientation of shale minerals to their elasticity
    experiments show that the anisotropy of shales can be approx-imated as transverse isotropy (TI) with a rotational symmetry axis normal to bedding plane Preferred orientation of clay platelets normally forms during mechanical compaction with some recrystallization at the ad-vanced stages of diagenesis (Wenk, 2007) The process of
  • Shale mineral interactions and interfacial mechanical properties . . .
    The anisotropy ratios of the three mineral interfacial systems are, from highest to lowest, quartz calcite > quartz illite > calcite illite These findings provide an important theoretical basis for optimizing the shale hydraulic fracturing target layer and the formation of hydraulic fracture network
  • Preferred orientation and elastic anisotropy of illite-rich shale
    The illitic shale displays roughly transverse isotropy with C 11 close to C 22 and more than twice as strong as C 33 ⁠ This method will lend itself to investigate complex polymineralic shales and quantify the contribution of preferred orientation to macroscopic anisotropy
  • Investigation of Mechanical Properties of Quartz and Illite in Shale . . .
    Firstly, this paper investigated the micro-mechanical properties of the main minerals (quartz and illite) in shale based on previous research results Then, by considering the influence of anisotropy, we utilized a molecular dynamics (MD) technique to analyze the deformation mechanism of tensile failure as well as calculate and verify the
  • Mathematical modelling of anisotropy of illite-rich shale
    Effective media modelling is used to predict the elastic properties of the illite-rich shale and to identify the dominant contributions to the shale anisotropy We consider two principal reasons of the shale anisotropy: orientation of clay platelets and orientation of fluid-filled cracks





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