Numerical simulation method and equipment for krauklis waves excited by shear waves in fractured media

Abstract

An embodiment of the invention provides a numerical simulation method and numerical simulation equipment for transverse wave excited Krauklis waves in a fractured medium. The numerical simulation method comprises the steps of: constructing a finite element discrete equation, loading a transverse wave incidence boundary condition to the finite element discrete equation, so as to obtain the finite element discrete equation loaded with the boundary condition; and constructing a boundary auxiliary matrix, a seismic source auxiliary matrix and a seismic source auxiliary vector, acquiring an iterative formula by combining an iterative algorithm, and solving the finite element discrete equation loaded with the boundary condition by adopting the iterative formula, so as to realize numerical simulation of the transverse wave excited Krauklis waves in the fractured medium. According to the numerical simulation method and the numerical simulation equipment for the transverse wave excited Kraukliswaves in the fractured medium provided by An embodiment of the invention, numerical simulation of the transverse wave excited Krauklis waves in the fractured medium can be effectively achieved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of Krauklis wave research, in particular to a numerical simulation method and equipment for Krauklis waves excited by shear waves in fractured media. Background technique [0002] Krauklis wave is a guided wave propagating in fluid-saturated fractures, and is an important part of the complex wave field in fractured media. Krauklis has the characteristics of strong dispersion and strong attenuation. Its high-frequency limit is Scott wave velocity, and its low-frequency limit is 0. The current research on Krauklis waves has always been based on the theoretical research based on the ideal single-fracture model with viscous fluid of infinite length, but the actual fractures in the underground medium are finite in length, so the theoretical analysis conclusions of the infinite-length fracture model are difficult to apply to the actual underground model. In addition, most of the simulati...

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Problems solved by technology

The current research on Krauklis waves has always been based on the theoretical research based on the ideal infinitely long single-fracture model with viscous fluid, but the actual underground medium fractures are finite in length, so the theoretical analysis conclusions of the infinitely long fracture model are difficult to apply to the actual underground model

In addition, most of the simulations of the wave equation are based on explosive seismic sources, which contain both longitudinal wave components and shear wave components, which makes the wave field extremely complex

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