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

A Fresnel beam migration imaging method for undulating surface in elastic media

A technology of undulating surface and elastic medium, applied in the field of exploration geophysics, can solve the problems of poor imaging quality and low accuracy of Green's function, and achieve the effect of reducing crosstalk noise of longitudinal and transverse waves, improving calculation accuracy, and high efficiency and flexibility

Active Publication Date: 2022-06-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since Gaussian beam migration requires plane wave decomposition on the observation surface, the sharply changing elevation makes the accuracy of the Green's function calculated by the conventional Gaussian beam method near the surface low, making the final migration result poor in near-surface and deep imaging quality

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
  • A Fresnel beam migration imaging method for undulating surface in elastic media
  • A Fresnel beam migration imaging method for undulating surface in elastic media
  • A Fresnel beam migration imaging method for undulating surface in elastic media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0048] A method for imaging Fresnel beam migration of an elastic medium undulating surface, comprising the following steps:

[0049] (1) Obtain input data, including the longitudinal wave velocity model v p (x), shear wave velocity model v s (x), source function wavelet f(t), field observation data d obs (x r ,t), where x is the subsurface imaging space coordinate, x r is the location of the detection point, t is the recording time parameter, and the subscripts p and s of the velocity model represent longitudinal and transverse waves.

[0050] (2) Using kinematic ray tracing to calculate the source position x s to the underground imaging point x The longitudinal wave travel time τ, using dynamic ray tracing to calculate the propagation parameters The kinematics ray tracing equation is shown in formula (1):

...

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 invention discloses a Fresnel beam migration imaging method on an elastic medium undulating surface, which relates to the field of exploration geophysics. This method enables the seismic beam to have an effective half-width of 1 / 4 wavelength near the surface, which can significantly improve the calculation accuracy of the Green's function in the near-surface region. The new seismic beam is applied to the multi-wave and multi-component seismic wave field continuation, and the elastic medium Fresnel beam migration imaging method is developed, which can significantly improve the imaging quality of land data near the surface while ensuring accurate imaging in the middle and deep.

Description

technical field [0001] The invention relates to the field of exploration geophysics, in particular to a Fresnel beam migration imaging method for the undulating surface of an elastic medium. Background technique [0002] Seismic migration is an important step in seismic data processing that transforms pre-stack seismic data into subsurface reflectivity profiles. Gaussian beam migration is an imaging method whose computational efficiency and imaging accuracy are between those of ray-based migration and wave equation migration. comparable imaging accuracy. At present, Gaussian beam migration has been extended to elastic media, and using the information of longitudinal and shear waves at the same time, it can not only accurately describe the information of the underground structure, but also give a certain estimate of the lithology information. [0003] At present, typical onshore oil and gas exploration areas not only have relatively complex underground structures (thrust fa...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/512
Inventor 杨继东田祎伟黄建平李振春孙加星徐洁
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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