Initiation of acoustic emission in fluid-saturated sandstone samples
- Authors: Lapshin V.B.1, Patonin A.V.2, Ponomarev A.V.3, Potanina M.G.4, Smirnov V.B.4, Stroganova S.M.3
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Affiliations:
- Fedorov Institute of Applied Geophysics
- Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth
- Schmidt Institute of Physics of the Earth
- Physics Department
- Issue: Vol 469, No 1 (2016)
- Pages: 705-709
- Section: Geophysics
- URL: https://journals.rcsi.science/1028-334X/article/view/188618
- DOI: https://doi.org/10.1134/S1028334X16070047
- ID: 188618
Cite item
Abstract
A rock behavior experiment with uniaxial compression revealed the effect of acoustic activity in loaded fluid-saturated Berea sandstone samples in response to an electric current. It is established that it is substantially intensified in periods of the current impact and decreases after its cut-off. The current impact also results in a growth of radial deformation indicating an increase in the sample volume. The effect of acoustic activation increases in response to increased heat emitted by the electric current during its flow through the sample, which allows the discovered effect to be explained by initiation of its destruction due to thermal expansion of the fluid in rock interstices and fissures.
About the authors
V. B. Lapshin
Fedorov Institute of Applied Geophysics
Email: potanina@physics.msu.ru
Russian Federation, ul. Rostokinskaya 9, Moscow, 107258
A. V. Patonin
Borok Geophysical Observatory, Schmidt Institute of Physics of the Earth
Email: potanina@physics.msu.ru
Russian Federation, Borok, Yaroslavl region, 152742
A. V. Ponomarev
Schmidt Institute of Physics of the Earth
Email: potanina@physics.msu.ru
Russian Federation, ul. Bolshaya Gruzinskaya 10, Moscow, 123995
M. G. Potanina
Physics Department
Author for correspondence.
Email: potanina@physics.msu.ru
Russian Federation, Moscow, 119991
V. B. Smirnov
Physics Department
Email: potanina@physics.msu.ru
Russian Federation, Moscow, 119991
S. M. Stroganova
Schmidt Institute of Physics of the Earth
Email: potanina@physics.msu.ru
Russian Federation, ul. Bolshaya Gruzinskaya 10, Moscow, 123995