... ABSTRACT Granitic rock subjected to multiple load/unload/reload cycles is observed to have a much lower stiffness on the first loading step compared to subsequent cycles. This apparent work hardening has been proposed to provide unique insight into a rock's stress history, making...

...; (2) GRM sample - Central Aare granite, a predominant host rock of the URL Grimsel, Switzerland. We used a detail ultrasonic measurement of P and S wave velocity to obtain a general form of stiffness tensor with 21 independent elastic constants for selected pressure levels from 0.1 to 100 MPa...

... of geothermal energy we’re talking about is found deep underground in certain rocks, like granite and gneiss. There are many ways to get this energy out of the ground, but the most common one is called an enhanced geothermal system. This involves creating fractures in the rock using a special fluid, so that hot...

... meteorite sample macroscale young rock-forming mineral laboratory-scale property low-ca pyroxene agbm interphase granite granitic sample ARMA 23 0412 Investigating the minerals and laboratory-scale property of planetary rocks using AGBM Yiheng Zhang, Xuhai Tang, Jingjing Xu, Quansheng Liu School...

... upstream oil & gas rock type geological subdiscipline united states government reservoir geomechanics specimen pore size distribution geology igneous rock dependence geologist thermal treatment axis amplitude engineering parameter heating temperature westerly granite...

... china government reservoir characterization loading rate rock mechanic uniaxial compression tensile strength bt specimen crystalline rock different size microstructure size effect granite peak stress compression test mining science experimental data brazilian test ARMA 23 0440 Size...

... ABSTRACT This study utilized digital image processing (DIP) and discrete element method (DEM) to explore the correlation between mineralogy and fracture propagation in granite. The study concludes that an increase in the content of quartz and feldspar leads to a gradual increase...

... microcracks or high porosity. This study aims to examine the subjectivity inherent in strain-based methods and its potential impact on consistent measurement of rock CI. A survey is then conducted using experimental data obtained from sandstone and granite specimens. Results suggest a wider scatter of CI...

... ABSTRACT To reveal the influence of confining pressure on the tensile properties of rock, Brazilian disc tests for tight sandstone and granite under different confining pressures were carried out. The tensile failure characteristics were analyzed, and the tensile strength-confining pressure...

... water jet hammer drillability periphery granite enhancing drilling performance interaction roller cone highpressure water jet ABSTRACT Geothermal energy is a leading candidate in fulfilling our transition efforts to a clean, sustainable, non-intermittent and renewable energy source...

... geology experiment geological subdiscipline sensor ae event solid earth granite seismic efficiency microseismicity ae sensor earthquake corner frequency viscosity injection fluid ABSTRACT In this study, Barre granite cubes were hydraulically fractured in laboratory, using different...

... produced water discharge sedimentary rock geology ln 2 reservoir characterization permeability clastic rock rock type reservoir geomechanics granite geologist united states government europe government geological subdiscipline cryogenic treatment upstream oil & gas mineral...

... on granite. The rock breakage process, the initiation and propagation of micro-cracks, the surface topography and fracture morphology of the cutting groove and large-size debris were analyzed. A three-dimensional rock cutting model with a CDE cutter was established using the finite element method to study...

... property enhanced geothermal system granite investigation co 2 porosity compressive strength hot rock geothermal reservoir stimulation zhang ARMA 23-187 Impact of Geomechanics on Hydrothermal Fluid Pathways in Enhanced Geothermal Systems: A Review Ngoma, M.C., Wamba Kenfack, A., Kolawole, O...

... ABSTRACT Hot Dry Rock (HDR) is an important clean energy resource. However, there are many problems in the exploration of HDR, which are closely related to the geological environment and properties of HDR. The representative lithology of HDR is granite. Granite has the characteristics of poor...

... characteristics, penetration/cutting force and torque were analyzed. Rock scratch experiments were further conducted on granites to validate the model. The results show that the complex cracks propagation zone and the larger tensile cracks around the cutter are developed subjected to coupled percussion, resulting...

... waterjet (AWJ) machining system and determines the rock-breaking performance. Here, we conducted AWJ rock-breaking experiments with straight cone nozzle (SCN), fan-shaped nozzle (FSN), swirling impeller nozzle (SIN) and straight-swirling mixed nozzle (SSMN). Granite and sandstone were selected...

...ARMA 22 63 Microscale observations of hydraulic fractures in Gonghe granite subjected to low- and high-cycle fatigue experiments Zhuang, L. Korea Institute of Civil Engineering and Building Technology, Goyang, Gyeonggi, Republic of Korea Zang, A. Helmholtz Centre Potsdam GFZ German Research Centre...

... 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...

... 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...