... ABSTRACT The tensile strength of crystalline rocks in Brazilian tests (BT) shows a more significant size dependency than the uniaxial compression strength in uniaxial compression tests (UCT), while the micro-mechanism is still unclear. This study seeks to elucidate the micro-mechanism...

... spanning from 35 m to 396 m, via a combination of laboratory experiment testing and geophysical log analysis. The experimental testing will comprise of a range of rock property measurements and characterisations, including uniaxial compression tests, Brazilian tensile tests, bulk and specific density...

...., 2017). Guo et al. (2020) conducted uniaxial compression test and acoustic emission monitoring on shale specimens with different bedding plane inclinations after thermal treatment of different temperatures. They found that the P-wave velocity decreases with the increase in bedding plane inclination...

... compression test mpa mechanical property engineering failure strength water-saturated sample transition deformation failure mode strength differential stress water-saturated condition rock sample triaxial compression test shear fracture ARMA 23 0311 Effect of Water Saturation on Failure...

... ABSTRACT: The Scratch Test is a quasi-non-destructive method made up of pushing a tool across the surface of a weaker rock at a given penetration depth. The Uniaxial Compression Test is a destructive method of measuring the maximum axial compressive stress a rock can withstand before failing...

... compression test metals & mining testing program cohesion specimen Reservoir Characterization strength confinement diameter high confinement residual friction angle Upstream Oil & Gas MPa rock type Rock mechanics low confinement friction angle peak strength residual cohesion...

... initiation compression test flaw stress level compression Plaster mechanics ARMA 19 1762 A laboratory and numerical investigation of flawed rocklike plates in compression Lotidis, M.A., Mytilinaiou, D.E., Nomikos, P.P., Sofianos, A.I. Tunnelling Laboratory, School of Mining and Metallurgical...

... degradation experiment compression test salt precipitation production pressure drop rock strength degradation tight sandstone fracture strength Simulation prediction sand production pressure drop mechanism degradation sandstone core plug ARMA 19 1919 Rock strength degradation induced by salt...

... flowing water. Thereafter, optical microscopic observation and uniaxial/triaxial compression tests were performed. Based on the experimental results, the thermal effect on brittleness was further analyzed. Experimental results show that numerous thermally-induced micro cracks were obviously generated when...

... compression tests, and finally stress analysis. Under field investigations, scan-line mapping of joints indicated few major joint sets in the surrounding rock mass to the rockburst location. Stress analysis showed very high stresses in the chain pillars and low stress concentration at the rockburst site...

... Upstream Oil & Gas cement failure optimized parameter Teodoriu internal friction angle true triaxial compression test Symposium evaluation Wellbore Design different failure criteria failure criterion compression test intermediate stress misfit experimental data ARMA 19 92 Comparison...

... envelope using a single plug core, especially for the test when there is insufficient number of cores to run the standard triaxial tests. In this paper, a series of multistage triaxial compression testes of gas saturated coal cores were conducted based on ISRM standard procedures to determine...

... pressure compression test Poisson anisotropy bulk modulus permeability grain bulk modulus horizontal plug geomechanics symposium ARMA 19 516 Biot s Effective Stress Coefficient Tensor Measurements on Mancos Shale Xuejun Zhou Ahmad Ghassemi Mewbourne School of Petroleum and Geological Engineering...

... laboratory creep tests and by comparing the resulting curve of creep with the Burger model fitting. Reservoir Characterization strength compression test constitutive model Upstream Oil & Gas particle psc model natural gas storage steady-state creep rate mechanical property micro-creep...

.... hydraulic fracturing displacement sandstone shale gas Upstream Oil & Gas variation complex reservoir transition Reservoir Characterization structural geology Brazilian test compression test failure behavior fracture MPa Fracture angle stress-lateral displacement curve fracture angle...

... properties in stochastic simulation. reservoir geomechanics specimen size random property property distribution Reservoir Characterization size effect weak zone diameter Upstream Oil & Gas heterogeneity international journal test result average strength rock block compression test...

... ABSTRACT: Cement sheath integrity supports the long-term safety production of oil and gas well. In order to research failure mechanism of cement sheath in HPHT conditions, uniaxial and triaxial compressive tests and cyclic loading test of cement are conducted, and mechanical property...

.... These micro-pillars were microfabricated with a focused ion beam (FIB) – scanning electron microscope (SEM). The results were compared with macro-scale uniaxial compression tests on fifteen 2.5-mm diameter samples (macro-pillars) and two 25-mm diameter samples. Compressive stress-strain, strength, and Young’s...

... flat-jointed material hydraulic fracturing Martin interface undisturbed lac du bonnet granite bonded-particle model compression test grain-grain contact contact model ARMA 18 1208 A Flat-Jointed Bonded-Particle Model for Rock Potyondy, D.O. Itasca Consulting Group, Inc., Minneapolis, MN, USA...

... potential is obtained by performing conventional triaxial compression tests on intact rock. Then, guided by empirical data and engineering experience, the intact rock values are scaled to fit the dilative characteristics of the rock mass in situ. A variety of dilation models (also called flow rules...