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An experimental method for studying the fault rupture process induced by water injection

An experimental method and fault technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems that the whole process of hydraulic diffusion cannot be captured, and the key mechanism of the interaction between rupture and water pressure cannot be further studied.

Active Publication Date: 2022-04-15
TIANJIN UNIV
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Problems solved by technology

[0006] Aiming at the problem that the traditional water injection induced earthquake experiment method cannot capture the whole process of hydraulic diffusion (including water injection pressure and diffusion velocity), and cannot further study the key mechanism of the interaction between rupture and water pressure in the induced earthquake process, the present invention provides a method for studying water injection induced earthquakes. Experimental Method for Seismic Fault Rupture Process

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  • An experimental method for studying the fault rupture process induced by water injection
  • An experimental method for studying the fault rupture process induced by water injection
  • An experimental method for studying the fault rupture process induced by water injection

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Embodiment Construction

[0035] In order to make the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] An experimental method for studying water injection induced earthquake tomography, steps are as follows:

[0037] The first step: the preliminary processing and fine treatment of the fault model, such as figure 1 As shown, preliminary processing includes a diagonal model and a chamfer design, such as figure 2 As shown, fine treatment includes a plurality of special structures including water injection holes, a water pressure monitoring chamber, and a broken layer rough structure;

[0038] Using transparent rock material polymethyl methacrylate to make a two-dimensional flat break layer 45 ° diagonal model, for convenient double-axis loading, the four-top angle is processed into a right-angle triangle chamfer to complete the sample, in the initial machining The model is...

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Abstract

The invention discloses an experimental method for researching the fault rupture process induced by water injection. The fault model is made by using transparent rock-like materials, the physical state of different fault planes is simulated by means of sand blasting, and high-frequency multi-field measurement (stress, strain, displacement) is adopted. The key parameters of the fault rupture process are calculated, and the water injection experiment is carried out on the fault plane under the biaxial loading system, which can completely "see" the whole process of the induced earthquake from incubation to instability and rupture, and further study the mechanism of the water injection-induced earthquake rupture process. And the characteristics of water injection-induced earthquakes under different water injection conditions. The invention provides technical support for exploring the changes in the whole process of water injection-induced earthquakes, and provides the possibility for ascertaining the rupture evolution of induced earthquakes.

Description

Technical field [0001] The present invention relates to the field of geophysical construction, and in particular, to a study on the study of water injection induced seismic fault cracking process. Background technique [0002] In recent years, almost most induced earthquakes are related to fluid injection in energy mining, and water injection induced earthquakes has become a focus of research and discussion (Ellsworth., 2013), and may be further developed with industrial and energy-related activities Continue to in-depth (Keranen and Weingarten, 2018). For example, the MW 5.5 earthquake in 1967 in Denver, Colorado (Healy et al., 1968; Davis and Frohlich., 1993), 2011 MW 5.7 earthquake in Prague, Oklahoma (Keranen et al., 2013; Van Der Elst et al., 2013; McGarr., 2014; SUMY ET Al., 2014) and MW 5.5 earthquake in Puya, South Korea (Kim etal., 2018; Grigoli et al., 2018). [0003] The water injection induced earthquake experiments have different scales: 1) large scale in situ experi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/133G01V1/30
CPCG01V1/133G01V1/306
Inventor 夏开文王璞徐冉张康华徐颖
Owner TIANJIN UNIV
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