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Keywords: acoustic emission
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Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0529
... ABSTRACT: In-situ stresses and their spatial distribution are important parameters in analyzing and designing underground structures. Deformation rate analysis (DRA) and acoustic emission (AE) are methods of in-situ stress measurement from oriented core, which take advantage of the stress...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0570
... ABSTRACT: Thermally induced stress changes in rock lead to creation and reactivation of microcracks with accompanying acoustic emissions (AEs). Therefore, monitoring AEs during cooling (or heating) of rock potentially allows us to determine the rock’s original stress state. This approach would...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0545
... just below the pressure limit, where occasionally formation breakdown is achieved. upstream oil & gas hydraulic fracturing fracture wellbore integrity complex reservoir wellbore design reservoir characterization cyclic loading propagate injection acoustic emission strength...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0621
... measurements and observations to understand these important processes, we study laboratory acoustic emissions in combination with numerical models to shed light on the physics governing seismicity. A dry sample of Berea sandstone was tested to failure under a confining pressure of 40 MPa in a triaxial machine...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0767
... characterization correlation frontier hydraulic fracturing journal xiong fracture hampton acoustic emission investigation rock fracture process fracture characterization notch geophysical research international journal variance dic variance triggering-triggered vector lockner ARMA 22 767...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0009
... the fracture development in glutenite, three-point bending tests were conducted on two glutenites and one sandstone. During the tests, digital image correlation (DIC) and acoustic emission (AE) were used to monitor the fracture development. It was found that compared with the load-displacement curve, the load...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0013
... cement technology suorineni reservoir characterization backfill university acoustic emission calculation determination accuracy effect strategy attenuation ARMA 22 13 Strategy towards accurate location of seismic events sources in mining environments: Effect of voids and backfill...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1845
... ABSTRACT: Hydraulic fracturing technique is commonly used to enhance the production of tight reservoirs. Generally, the effect of hydraulic fracturing is appraised through true triaxial hydraulic fracturing experiments in laboratory, in which acoustic emission (AE) is often used to monitor...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2121
... rock are of major importance. Plane strain compression experiments were performed on dry, oil- and water-saturated Berea sandstone under different boundary conditions. The deformation of the material was measured and the acoustic emission (AE) activity was recorded. Onset of inelastic response...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1759
... into two groups. In the first group, the samples were saturated by SC-CO 2 , then the fracture toughness was measured in an SC-CO 2 environment, and the other group was only been exposed to the atmosphere. The fracture processes were recorded by acoustic emission(AE) technology. It was found...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1730
... subhorizontal (13°), subvertical (86°) and oblique (47°), were uniaxially loaded up to failure. Acoustic emission monitoring and ultrasonic sounding were applied for fracturing characterization. In case of subhorizontal and subvertical foliation, the tensile source type played an important role before reaching...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1711
... ABSTRACT: In-situ acoustic emission (AE) monitoring is applied in mines as part of geomechanical investigations regarding the stability of underground cavities and the integrity of the rock mass. This work will report about In-situ AE monitoring in various mines. The applied AE sensors use...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1776
... hydraulic fracturing prefabricated flaw AE event fluid pressure geothermal reservoir data acquisition system international journal Upstream Oil & Gas acoustic emission initiation Einstein triaxial loading condition experiment Gonçalves da Silva Coalescence propagation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1927
... ABSTRACT: In this paper, we applied acoustic emission monitoring for supercritical carbon dioxide fracturing experiment in general triaxial stress state. The large-scale outcrop shale sample cubes were used to simulated fracturing in the field and to reveal the law of fracture generation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1943
... process of hydraulic fracturing using acoustic emission (AE). Experimental results show that the location of small few AE events along BP near the wellbore and stable injection pressure indicated the fracturing fluid leaking into the dilated BP under low injection rate (= 10 mL/min). In this case the SRV...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1595
... Characterization flow in porous media Fluid Dynamics Upstream Oil & Gas flow rate acoustic emission experiment integrity permeability helium air void MPa macrofracture pressure vessel apparent permeability casing and cementing displacement axial strain specimen microfracture deformation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0246
... not appear to be related to the viscosity of the pore fluid. 1. INTRODUCTION Acoustic emissions (AE) are commonly observed in natural rock during its deformation and failure. This effect can serve as a precursor to failure, as well as an indicator of fracture initiation, growth, and closure. AE...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-151
... hydraulic fracturing shear wave response polarization Upstream Oil & Gas shear wave slowness pyrophyllite plane hydraulic fracture Reservoir Characterization acoustic emission waveform bedding plane fracture polarization parallel mapping hydraulic fracture propagation shear...

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