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Rayleigh wave inversion method of employing simulated annealing improved on the basis of differential evolution and block coordinate descent

A technology of block coordinate descent and simulated annealing, applied in the field of high-precision near-surface Rayleigh wave inversion, to achieve the effects of improving accuracy, realizing controllability, and improving prediction accuracy

Active Publication Date: 2019-11-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0004] The main purpose of the present invention is to provide a simulated annealing Rayleigh wave inversion method that can improve the accuracy and stability of simulated annealing inversion in Rayleigh wave exploration, aiming to solve the above technical problems existing in existing methods

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  • Rayleigh wave inversion method of employing simulated annealing improved on the basis of differential evolution and block coordinate descent
  • Rayleigh wave inversion method of employing simulated annealing improved on the basis of differential evolution and block coordinate descent
  • Rayleigh wave inversion method of employing simulated annealing improved on the basis of differential evolution and block coordinate descent

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[0043] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0044] Rayleigh wave inversion is a highly nonlinear and multi-modal problem. The simulated annealing algorithm faces two main problems in the Rayleigh wave inversion: First, the Rayleigh wave inversion is a multi-parameter problem. As the number of inversion layers increases, the inversion parameters will increase exponentially, while the simulated annealing algorithm It is more suitable for solving single parameter problems. When the inversion parameters increase, it will seriously affect the final result. Second, simulated annealing uses temperature as the termination condition, and the se...

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Abstract

The invention discloses a Rayleigh wave inversion method of employing simulated annealing improved on the basis of differential evolution and block coordinate descent. The method comprises the steps of firstly building an inversion objective function; optimizing a parameter model of the inversion objective function by using an differential evolution algorithm and obtaining best individuals; carrying out simulated annealing treatment on each individual by adopting a block coordinate descent algorithm; and taking the obtained new individuals as the individuals of the next generation population.According to the Rayleigh wave inversion method, the accuracy of simulated annealing inversion can be effectively improved and the controllability of simulated annealing on the accuracy is achieved through building the inversion objective function, optimizing the inversion objective function by adopting the differential evolution algorithm and dividing a multi-parameter problem into a local iterative optimization problem of multiple single parameters by adopting the block coordinate descent algorithm, thereby improving the stability of simulated annealing; and the Rayleigh wave inversion method can be applied to inversion of seismic data of actual shallow exploration, and the prediction accuracy of a near-surface underground structure is improved.

Description

Technical field [0001] The invention relates to near-surface geophysical exploration technology, which is a high-precision near-surface Rayleigh wave inversion method. The technology can be applied to near-surface velocity survey, geotechnical engineering, oil and gas exploration near-surface velocity analysis, underground engineering detection and other fields . Background technique [0002] Rayleigh wave is a wave that is formed by superimposing the vertical components of longitudinal wave and transverse wave when propagating along the free interface and propagating along the free interface. Rayleigh waves usually propagate along the ground and are very sensitive to the thickness and shear wave velocity of the formation (Xia et al., 1999), and have dispersion characteristics in layered media (Ma Jianqing et al., 2010). Compared with conventional exploration methods, Thunderwave exploration has the advantages of high resolution and fast detection speed (Qi Shengwen et al., 2002...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G06N3/12
CPCG01V1/28G01V1/282G06N3/126
Inventor 王峣钧伍锡军张真梁邢凯胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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