Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Elastic Gaussian beam migration imaging method and system

A technology of offset imaging and Gaussian beam, which is applied in the imaging field and can solve problems such as no implementation method

Active Publication Date: 2017-06-27
BC P INC CHINA NAT PETROLEUM CORP +2
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current anisotropic Gaussian beam method only images 2D TI single-component data, which is closer to the actual 3D elastic TI medium multi-component Gaussian beam migration. There is no complete implementation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elastic Gaussian beam migration imaging method and system
  • Elastic Gaussian beam migration imaging method and system
  • Elastic Gaussian beam migration imaging method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] figure 1 The flow chart of the elastic Gaussian beam migration imaging method provided by the embodiment of the present invention.

[0096] refer to figure 1 , the elastic Gaussian beam migration imaging method includes:

[0097] Step S101, obtaining initial parameter information and multi-component seismic records, and determining the half-width of the Gaussian window and the coordinate position of the beam center point according to the initial parameter information;

[0098] Specifically, the Gaussian beam initial parameter information, beam center interval, Gaussian window half-width, etc. are determined according to the physical parameters of the medium, wave field attributes, and single shot information, and a series of coordinate positions of the beam center point are determined.

[0099] Step S102, within the Gauss window range of each beam center point, decompose the multi-component seismic records to obtain multi-component local plane waves;

[0100] Specifi...

Embodiment 2

[0158] image 3 Schematic diagram of the structure of the elastic Gaussian beam migration imaging system provided by the embodiment of the present invention.

[0159] refer to image 3 , the elastic Gaussian beam migration imaging system includes:

[0160] An acquisition unit 10, configured to acquire initial parameter information and multi-component seismic records, and determine the half-width of the Gaussian window and the coordinate position of the beam center point according to the initial parameter information;

[0161] The decomposition unit 20 is used to decompose the multi-component seismic records to obtain multi-component local plane waves within the Gauss window range of a single beam center point;

[0162] The conversion unit 30 is used to convert the multi-component local plane wave into a multi-mode scalar local plane wave by using the mode separation matrix;

[0163] The first calculation unit 40 is used to inject Gaussian beams in different directions, and ...

Embodiment 3

[0179] Firstly, a 2D elastic Hess model is used to verify the correctness of the embodiment of the present invention. The grid samples of the model in the z and x directions are 1500 and 3617 respectively, and the grid intervals are both 20ft. Figure 5 (a)(b)(c) respectively show the elastic parameter model V of Thomsen form P0 , ε and δ, V S0 By wave velocity ratio To determine, the abscissa in the figure is the distance, and the ordinate is the depth. The Hess model is a VTI model, which is a special case of the TI model. The TI medium method designed in the embodiment of the present invention is applicable to the VTI medium. Depend on Figure 5 It can be seen that the near surface of the model is an isotropic medium, which is consistent with the assumptions in the embodiment of the present invention, and there are isotropic high-speed salt domes in the model. The model seismic data is synthesized by the finite difference method, which is a two-dimensional two-componen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides an elastic Gaussian beam migration imaging method and a system. The method includes the steps of acquiring the initial parameter information and a multi-component seismic record, and determining the half width of a Gaussian window and the coordinate position of a beam center point; within the range of the Gaussian window of each beam center point, decomposing the multi-component seismic record to obtain a multi-component locally plane wave; based on a wave-type separation matrix, converting the multi-component locally plane wave into a multi-wave type scalar local plane wave; shooting Gaussian beams in different directions, calculating an expression in the vector form, the complex travel time of Gaussian beams and the complex amplitude thereof; based on a wave-field migration imaging formula, calculating the summing superimposition of imaging points according to the scalar local plane wave, the complex travel time and the complex amplitude; modifying the beam center point and the shot gather so as to obtain the migration imaging through iterative computation. According to the technical scheme of the invention, the complete and effective 3D elastic Ti-medium multi-component Gaussian beam migration method is designed. In the vector representation form, wave-field propagation properties are described. Therefore, a reasonable migration imaging formula is provided. The method and the system are high in applicability.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to an elastic Gaussian beam offset imaging method and system. Background technique [0002] Among the current migration methods, there is no complete and effective method for migration imaging of 3D elastic TI media. Due to the excessive elastic parameters of TI medium (generally 21 elastic parameters are non-zero) and the low velocity of shear waves, the elastic wave equation method requires a huge increase of one to two orders of magnitude in the amount of calculation and storage in 3D cases. The quasi-acoustic wave equation has no specific physical meaning, it can only achieve relatively accurate travel time calculation, and the amplitude information has no physical meaning, so it is only applicable to conventional anisotropic migration. In the current ray method, geometric methods such as phase angle and group angle are generally used to represent phase velocity and group velo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01V1/28
Inventor 毛伟建栗学磊许茜茹岳玉波王成祥
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com