Krauklis wave numerical simulation method and equipment based on plane wave seismic source

Abstract

The embodiment of the invention provides a Krauklis wave numerical simulation method and equipment based on a plane wave seismic source. The method comprises the following steps: constructing a viscous fluid saturated single-fracture digital model, performing unit mesh generation on the viscous fluid saturated single-fracture digital model to obtain a discrete finite element equation, determiningboundary condition parameters required by digital simulation, and simplifying the discrete finite element equation according to the boundary condition parameters to obtain a final finite element discrete equation; and determining a seismic source auxiliary matrix and a seismic source auxiliary vector, and solving the final finite element discrete equation in combination with an implicit iterationmethod to realize Krauklis wave numerical simulation of the plane wave seismic source. According to the Krauklis wave numerical simulation method and equipment based on the plane wave seismic source provided by the embodiment of the invention, Krauklis wave numerical simulation of the plane wave seismic source can be realized.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of Krauklis wave research, in particular to a Krauklis wave numerical simulation method and equipment based on a plane wave source. Background technique [0002] Subsurface fractures are widely distributed in the crust and upper mantle. Fractures are storage spaces and migration channels for underground fluids. etc. have significant impact. Seismic waves are an important medium for studying fractures, but the existence of fractures will make the seismic wave field extremely complex. Currently, the commonly used methods for detecting fractures using seismic waves, whether it is post-stack attribute methods, anisotropy or shear wave splitting methods, can only be qualitative. To identify cracks, it is difficult to extract accurate information of cracks, especially the geometric information of cracks, including the opening and length of cracks. [0003] Krauklis wave is a guided wave pro...

AI Technical Summary

Problems solved by technology

However, numerical simulation of Krauklis waves in finite-length fractures is always a difficult point. One of the difficulties is that in the deep underground where fractures develop, the wave fronts of seismic waves are closer to plane waves, while the current digital simulation of elastic waves is mainly based on spherical waves. In addition, The digital simulation of Krauklis waves in fractured media is a typical multi-scale problem, and the model scale, wavelet scale, and fracture scale are of different magnitudes

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