.... INTRODUCTION Rock deformation and failure are often dependent on loading direction; as such, considering the mechanical anisotropy of rock is important in various civil, mining, and petroleum engineering applications. The anisotropic elastic constants have to be considered for in-situ stress measurement...

... ABSTRACT: In this study, a special focus was dedicated to the effect of elastic anisotropy of shales on the in-situ stress contrast between different layers and its implications on the vertical containment of hydraulic fractures (HF) and how they relate to the widely observed fracture driven...

... in laboratory experiments and focused on the effects of fluid saturation of the test specimens and the effects of stress anisotropy. The laboratory results were used to calibrate a semi-analytical model and a numerical nonlinear finite element model for developed for sand onset and sand mass/rate prediction...

... of anisotropy dispersion curves obtained from the three wells. An advanced processing workflow was executed on the open fracture traces observed on the FMI logs in order to estimate the kinematic and hydraulic aperture of the fractures. The results obtained were used to characterize fracture porosity. Three...

... and thus understanding the shale mechanical behavior should incorporate the influence of bedding planes (Woo et al., 2021). In addition, the existence of physical discontinuities in the rock such as natural fractures or tectonic features contributes to the anisotropy at the rock mass scale. wellbore...

... & gas reservoir characterization grasselli barton criterion casted discontinuity strength roughness discontinuity criteria shear strength equation casagrande rock mechanic compressive strength anisotropy ytec table 2 mpa rock engineering ARMA 22 0273 YTEC - Privada Characterization...

... composition poisson reservoir evaluation shale gas proceedings anisotropy coefficient characteristic fracability laboratory experiment ARMA 22 664 The mechanical properties of three types of shale oil reservoirs and its influence on hydraulic fracturing Xiaoqiong Wang1*, Yuping Qian2, Junhua...

... ABSTRACT: In this paper, Longmaxi formation shale in Fuling area is taken as the research object. The elastic wave velocity test is carried out to evaluate the elastic properties, and the relationship between the mineral compositions of the rock and the elastic wave anisotropy of is discussed...

... quality (e.g., length, type, and number). In addition, repetitive application of shock waves in wellbore is investigated. Pulsed fracturing in the cased and perforated wellbore is compared with open-hole situation. This work examines the effect of confining stresses and stress anisotropy. The shock wave...

... and the imaged shale deformations were used to constrain elasto-plastic properties and strength anisotropy of the tested Green River shale sample. 1. INTRODUCTION The evolution of rock fractures and their fluid transmissivity are critical in underground energy geosciences activities, such as hydrocarbon...

... stiffnesses using oriented rock samples collected from outcrops located near the San Emidio geothermal field. In this paper, we seek to understand (1) the static and dynamic elastic properties of the rock formations, (2) the existence or absence of anisotropy or heterogeneity-controlled behavior...

...), but their anisotropic elasticity is normally neglected, either because of model limitations, or in lack of input data. Here, however, the impact of anisotropy along with the elastic contrast between undrained surroundings and drained (isotropic) reservoir rock is addressed through a series of numerical scenarios...

... the anisotropy is low, the orientation of the minimum velocity corresponds to the highly preferred orientation of plagioclase (010) and biotite (001). Image analyses showed that there is also preferred orientation of microcracks regardless of their size and thermal treatment level. Neutron diffraction...

... magnitude mechanism geothermal reservoir microseismicity geophysical research reservoir geomechanics fracture machine learning anisotropy algorithm orientation inversion geyser constrained time-lapsed windowed microseismic imaging california solid earth evolution seismicity dynamic...

... ABSTRACT: For analyzing the influence of structural anisotropy on the hydro-mechanical behavior of a clay shale, we performed three consolidated, undrained triaxial compression tests with different geometric specimen configurations. Opalinus Clay specimens were tested with bedding plane...

... a 2D high-speed imaging scheme for hydraulic fracturing test in the plane strain and in-situ stress conditions. Five bedding angles were taken account to understand the effects of shale anisotropy on hydraulic fracture propagation. The dynamic propagation behaviors and their trajectories were recorded...

... model hydraulic fracturing structural geology sánchez camus log analysis flow in porous media complex reservoir drillstem/well testing fractured corridor production control wellbore integrity shale gas elastic symmetry stress field colorado argentina reservoir conditions anisotropy...

... was presented. ABSTRACT: Anisotropy in the mechanical properties of rock is often attributed to bedding and mineral texture. Here, we use 3D printed synthetic rock to show that, in addition to bedding layers, mineral fabric orientation governs sample strength, surface roughness and fracture path under mixed...

... ABSTRACT: Creep deformations in shale gas rocks manifest a few common characteristics: anisotropy, irreversibility, and a strong correlation to the clay and organic content. At the same time, however, the specific creep responses, such as the magnitude of creep and the degree of anisotropy...

... geomechanics strength reduction factor rock-mass strength three-dimensional anisotropic shear strength anisotropy dip direction anisotropic strength upstream oil & gas orientation reduction factor rock mass ARMA 21 1799 Three-Dimensional Anisotropic Shear Strength of Jointed Rock Masses Cylwik...