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Keywords: p-wave velocity
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1098
... granite core cheng autocorrelation length aperture distribution roughness parameter hydraulic fracturing host rock p-wave velocity fluid dynamics stress dependent fracture flow aperture height permeability-velocity relation characterization joseph ho yin ma fractured rock elastic property...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1965
... ABSTRACT: Geothermal energy is a renewable energy resource that can be found in abundance on the earth. Effective fracturing technology is the precondition to develop it efficiently. In this paper, the tests of the P-wave velocity, uniaxial compressive strength, and permeability...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0344
... fracturing, which relies on water-based fluids. hydraulic fracturing nitrogen brittleness ratio complex reservoir mechanical property core sample shale gas experiment Poisson Upstream Oil & Gas USA rock mechanical property injection p-wave velocity fracture liquid nitrogen thermal...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0454
... sensitivity Reservoir Characterization tight gas unconventional tight gas sand reservoir sonic velocity log analysis structural geology plug sample core measurement wireline log continuous profile p-wave velocity wireline sonic tool geomechanical property stress condition sonic tool elastic...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1753
..., this early-age effect of CO 2 on Draupne shale seems very little and is within the experimental error. The results of P-wave velocity measurements reveal a possibility that CO 2 may be coming out of solution during the test. In order to address this possibility, the experimental conditions are being...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1791
..., p-wave velocity and geological origin. The results indicate that the self-organizing maps have a promising potential in lithological clustering. The algorithm accurately clusters limestone classes that have consistent high or low values for at least one of the input parameters. However, the accuracy...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1375
... ABSTRACT ABSTRACT: This study investigated the precision damage of the rock under step loading. The method of spatial acoustic emission (AE) evolution based on the variation of P-wave velocity at stages was proposed. During the step loading test, Acoustic emission signal and P-wave velocity...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1422
... in highly heterogeneous formations such as fluvial and lacustrine sedimentary rocks. Acoustic/sonic P-wave velocity (Vp) provides one of the best proxies for formation strength, but it is stress- and frequency-dependent. Vp-strength relationships, therefore, can be very sensitive to experimental conditions...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-317
... neutron diffraction, effective media modeling was performed. The implementation of a nonlinear approximation of the P-wave velocity pressure relation was applied to estimate the mineral matrix properties and the orientation distribution of microcracks. The observed discrepancies (about 10%) between...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-535
... of HDR in the quantitative evaluation of the reservoir fracturing. The variation regularity of mode I fracture toughness and tensile strength after high temperature and liquid nitrogen cooling treatment were studied in this paper. The mode I fracture toughness, tensile strength, and p-wave velocity were...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-966
... ABSTRACT: In this paper, we mainly aim to investigate the effect of cyclic heating and cooling with liquid nitrogen (LN 2 ) on rock deterioration, which is a crucial concern in the engineering application of cyclic cryogenic fracturing. P-wave velocity test and uniaxial compressive test were...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-086
... ABSTRACT: Index properties of rocks are vital in the planning and design of geo-mining structures. It is a time consuming and laborious job to determine index properties in laboratory and also involves expensive equipment and proficiency, but the determination of P-wave velocity in laboratory...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0829
... of seismic energy. We present a detailed study on the pressure dependence of P-wave velocities and amplitudes on a spherical sample of antigorite serpentinite from Val Malenco, Northern Italy. Measurements were done at room temperature and hydrostatic pressures up to 400 MPa in a pressure vessel with oil...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0688
... radial direction shale barrier radial velocity p-wave velocity Fluid Dynamics radial stress experiment fjær triaxial test creep Horsrud axial stress ultrasonic property porosity orthogonal radial direction deformation 1. INTRODUCTION Sealing of new wells, in addition to plug...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0391
...-temperature (~140°C) fluids from fractured basalt. The UCS values were measured in unconfined compressive tests, density and porosity were measured using a He-pycnometer, and p-wave velocities were measured in a pressure vessel under variable confining pressures. We use correlations between density and p-wave...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-783
.... The Authors investigated the evolution of porosity and microstructure using Scanning Electron Microscopy (SEM), Mercury Intrusion Porosimetry (MIP) and P-wave velocity measurements. Intact specimens of Opalinus shale exhibit highly heterogeneous microstructures with significant concentrations of micron-scale...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-351
... microcrack MPa elastic property perpendicular diffraction antigorite Velocity distribution foliation Upstream Oil & Gas velocity measurement p-wave velocity anisotropy elastic anisotropy Lokají�ek cube Microstructure 1 INTRODUCTION Serpentinites are formed at the top of subducting...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-800
..., using a combination of 3D geomechanical modelling and the application of rock-physics predictions. The modelling predicts an increase in compressive stress in directions perpendicular to the salt face compared to a background model without salt. This stress increase causes an increase in P-wave velocity...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-134
... experimental results, where a sample was first loaded in a polyaxial loading frame and then fractured by injection of a viscous fluid at a constant flow. During the experiment, P-wave velocities were periodically measured in different directions. Our results show that ultrasonic measurements can be useful...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7559
... provided the full set of poroelastic parameters. Additionally, the specific storage coefficient was calculated. Inability to obtain constant values of Skempton B coefficient even at high pore pressures (~ 4 MPa) and the decrease in P-wave velocity with water injection revealed partial dissolution...

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