A three-dimensional elastic wave field vector decomposition method, device and computer storage medium

An elastic wave and field vector technology, which is applied in the fields of exploration geophysical data processing and parameter inversion, can solve problems such as strong crosstalk noise, and achieve the effect of improving the calculation rate, wide application fields and improving calculation efficiency.

Active Publication Date: 2021-05-11
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

For example, when using the cross-correlation imaging condition of the components, the aliasing of P-wave and S-wave energy will make the result contain strong crosstalk noise

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  • A three-dimensional elastic wave field vector decomposition method, device and computer storage medium
  • A three-dimensional elastic wave field vector decomposition method, device and computer storage medium
  • A three-dimensional elastic wave field vector decomposition method, device and computer storage medium

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Embodiment Construction

[0091] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention are clearly and completely described below. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without making creative efforts belong to the protection scope of the present invention.

[0092] In this embodiment, two theoretical models with lateral and depth distances of 520m are established, and the model parameters of the three-dimensional medium are v p = 3.0km / s, v s =1.5km / s, ρ=1.0g / cm 3 . Set the Thomson parameters of different media, the isotropic model is ε=δ=0.0, and the elliptical VTI medium model is ε=δ=0.3. Place the Reker wavelet point source in the center of the model, and after wave field continuation and fast vector decomposition, the app...

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Abstract

The present invention relates to a three-dimensional elastic wave field vector decomposition method, device and computer storage medium. The decomposition method includes the following steps: a. setting model parameters with reference to the PREM geophysical model; b. based on the relationship between the medium elastic parameters and Thomsen parameters , using the model parameters to calculate the elastic parameter C of the three-dimensional medium ijkl ;c provides the seismic source, and performs time iteration t based on the elastic wave equation i , in each iteration process, the stress and displacement are calculated according to the model parameters and elastic parameters. After obtaining the elastic wave field, the vector decomposition method is used to decompose the elastic wave field to obtain the P wave field and the S wave field. The present invention can obtain the pure wave field efficiently from the mixed wave field coupled by P wave and S wave, and consider the influence of elastic parameters on the constitutive equation in the case of isotropic and anisotropic VTI media respectively, and establishes a method for different Elastic wave decomposition calculation method of medium characteristics.

Description

technical field [0001] The invention relates to a three-dimensional elastic wave field vector decomposition method, a device and a computer storage medium, and belongs to the fields of exploration geophysical data processing and parameter inversion. Background technique [0002] Oil and gas resources are still the most important energy consumption goods in the world today. Increasing the exploration of complex oil and gas reservoirs and improving the recovery of existing oil and gas reservoirs are the key to the development of exploration geophysics at this stage. However, after decades of exploration and development, there are fewer and fewer high-quality oil and gas reservoirs, and traditional oil and gas reservoirs are becoming more and more complex, which greatly increases the cost of exploration and development. In the exploration of complex oil and gas reservoirs, the current high-precision oil and gas exploration needs cannot be met only by using existing technologies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 左佳卉赵杨杨继东陈海潮
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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