... ABSTRACT: In this paper we present the results of a laboratory experimental study to measure the poroelastic properties of Utah FORGE reservoir rock. The target formations are granite and granodioritic rocks of low permeability so that the determination of their poroelastic properties...

... ABSTRACT: Previous studies have revealed that hydraulic fracturing behavior in crystalline rock (i.e., granite) is highly dependent on mineral content, grain size, and heterogeneity and is therefore quite different from the behavior observed in sedimentary rock (i.e., sandstone). We...

... modeling in combination with the analysis of experimental records helps to understand the mechanism of dynamic fracture and to predict the fracture process for a nontransparent granite block with and without preexisting fractures which will be used at the next stage of this study. 1 INTRODUCTION...

... and brittleness under static compressive loading. Thus, the fragmentation features including size, mass and shape for Gosford sandstone and granite were analyzed. The fractal dimensions were calculated through the mass-size statistical distribution and then compared with the brittleness levels obtained from...

... particle strength evolution granite algorithm kulatilake fracture science heterogeneity injection hydraulic stimulation rock mechanic permeability computation pressurization journal x-ray computed tomography ARMA 22 0376 Numerical study on the effect of localized fluid pressurization...

... of full field strain measurement for locating the point of inflection in deformation rate analysis. Cyclic loadings were performed on Brazilian disc specimens of Adelaide black granite and the deformation process was monitored using digital image correlation (DIC) and AE monitoring system. The tests were...

...-concrete interfaces under tensile loading is not yet well understood. In this study, digital image correlation and acoustic emission techniques were employed to investigate the effect of the interface on the strength and the fracture properties of granite-mortar specimens under tensile loading. Our results...

... (FPZ). However, the characteristics of mode II fracture are still determined based on the linear elastic fracture mechanics (LEFM), which assumes that a pure mode II loading results in a pure mode II fracture. In this study, the FPZ development in Barre granite specimens under mode II loading...

... at a Terzaghi effective mean pressure P ′ = P − p = 15.0 MPa for Westerly blue granite, a typical crystalline rock. The specimen is saturated using the back pressure saturation approach, where a constant Skempton B -value at a specific Terzaghi effective mean pressure ensures full saturation...

... is calibrated to provide the tensile stress in the specimen. A Charcoal granite specimen with side notches at its center was used for testing within a closed-loop, servo-hydraulic load with crack opening displacement (COD) at a rate of 0.02 micron/s used as the feedback signal. The rock specimen was attached...

... understood but by simultaneous measurement of seismic and distributed quasi-static deformation, we can investigate these phenomena. This paper presents the results of a triaxial test on a dry, intact Rotondo granite sample implemented with both optical fibers to measure the distributed strain and calibrated...

... sedimentary and igneous origins. A set of commonly used brittleness indices (BI) were deployed to measure the rocks brittleness, then with the aid of high-speed imaging technique, the failure mechanisms of sandstone and granite were compared. The behavior of samples was monitored from the commencement...

...) for studying the rock fracturing process, both at the laboratory-scale and at the field-scale. In laboratory-scale BBMs, the blocks are analogous to constituent mineral grains while the contacts between neighboring blocks correspond to grain boundaries. It is known that during a compression test on granite...

... cracks) when minerals undergo a phase transition. In the last decades several lithologies have been tested under different ranges of temperatures. Among the different rocks, granites (Kang et al., 2020; Shang et al., 2019; Zhang et al., 2020), carbonates (Ferrero and Marini, 2000; Guler et al., 2021...

...ARMA 21 1581 Effect of Cyclic Thermal Shock on Mechanical Properties and Brittleness of Granite Li, N. and Wang, H.B. SINOPEC Petroleum Exploration and Production Research Institute, Beijing, China Zhang, S.C., Zou, Y.S., and Zhang, Z.P. State Key Laboratory of Petroleum Resource and Prospecting...

... ABSTRACT: In the process of exploring the mechanical properties of deep strata, we find that the granite after heat treatment has a negative Poisson's ratio effect. Therefore, we carried out the microstructure test and uniaxial compression experiment of granite in Gonghe basin of Qinghai...

... granite breakdown pressure evolution reservoir characterization engineering borehole mpa sensor injection rate fracture ae event amplitude ARMA 21 1801 Acoustic Emission Source Mechanisms Evaluation of Hydraulically Induced Fractures in Brittle Rocks Butt, Awais Colorado School of Mines...

... mechanical properties fracture granite fracture performance fracture propagation demolition agent reservoir rock mineral tensile strength ABSTRACT: Artificial fracture stimulation has been widely used to exploit unconventional energy and mineral resource to meet the growing energy consumption...

... as ‘petrothermal’ or ‘hot dry rock geothermal’ energy. shear zone experiment hydraulic stimulation fault zone circulation experiment bedretto underground laboratory granite reservoir foliation renewable energy borehole brittle fault zone fracture rotondo granite stimulation geoenergy ductile...

... by the material’s strength (small-scale yielding) to a power-law size-dependent regime following the linear elastic fracture mechanics (LEFM) asymptote. In granite, as in many rocks in general, the characteristics of the granular assembly control the macroscopic structural response (Barton 1982; Tarokh and Fakhimi...