Alteration of Deformation Mode of Fracture after Fluid Injection
G. G. KOCHARYAN1,2, A. A. OSTAPCHUK1,2, V. S. MARTYNOV1,2
1Institute of Geosphere Dynamics, Russian Academy of Sciences, Leninskii pr. 38, Bld. 1, Moscow, 119334 Russia
2Moscow Institute of Physics and Technology, Institutskii per. 9, Dolgoprudny, 141700 Russia
Keywords: техногенно-тектонические землетрясения, разлом, режим скольжения, инжекция флюида, снижение сейсмической опасности, лабораторный эксперимент, induced-and-tectonic earthquakes, fracture, slip mode, fluid injection, seismic hazard reduction, laboratory test
Abstract
The first results of the experiments on influence of fluid injection on the mode of interblock contact deformation are reported. It is found that deformation energy consumed to radiate seismic waves largely depends on parameters of fluid injected in fracture. Dilatant fluid appears to be the most efficient in the decrease of the seismic energy as the fluid viscosity grows with the rate of deformation. In the laboratory test, the slip-stick motion mode transforms into the quasi-stable creep in a single deformation cycle after fluid injection.
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