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

An Elastic Prism Wave Reverse Time Migration Imaging Method Based on the Deconstruction Equation of P-S Wave in Curved Coordinate System

A reverse time migration imaging and prism wave technology, applied in the field of petroleum geophysical exploration, can solve the problems of seismic imaging difficulties, inability to make full use of shear wave information, and inability to image high and steep structures

Active Publication Date: 2020-08-11
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Dramatic piedmont undulations make seismic imaging difficult
Conventional seismic exploration uses reflected waves for imaging, but high and steep structures cannot be imaged. Therefore, high and steep structures can be imaged using prism wave information. Conventional prism wave imaging techniques are based on the acoustic wave approximation assumption to image single component seismic records , unable to make full use of shear wave information

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
  • An Elastic Prism Wave Reverse Time Migration Imaging Method Based on the Deconstruction Equation of P-S Wave in Curved Coordinate System
  • An Elastic Prism Wave Reverse Time Migration Imaging Method Based on the Deconstruction Equation of P-S Wave in Curved Coordinate System
  • An Elastic Prism Wave Reverse Time Migration Imaging Method Based on the Deconstruction Equation of P-S Wave in Curved Coordinate System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0074] combine figure 1 As shown, an elastic prism wave reverse time migration imaging method based on the deconstruction equation of longitudinal and shear waves in the curved coordinate system includes the following steps:

[0075] Step 1: Input the P-wave velocity field, multi-component actual observation shot records, undulating surface elevation and observation system files;

[0076] Step 2: Generate an orthogonal body-fitted grid according to the elevation of the undulating surface, and transform the velocity field of the longitudinal and shear waves to the curved coordinate system;

[0077] Step 3: Calculating the P-wave field and S-wave field of the prismatic wave source extending forward under undulating surface conditions;

[0078] The calculation formula of the forward continuation of the prism wave FI wave fie...

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, which relates to the field of petroleum geophysical exploration, discloses an elastic prism wave reverse time migration imaging method based on a longitudinal and transverse wave deconstruction equation of a curved coordinate system. The method comprises: inputting longitudinal and transverse wave velocity fields, a multi-component actual observation gun record, an undulating surface elevation and an observation system file; generating an orthogonal body-fitted mesh according to the undulating surface elevation and transforming the longitudinal and transverse wave velocity fields into a curved coordinate system; calculating a P wave field and an S wave field of a prismatic wave source with forward extension under undulating surface condition; calculating a P wave field and an S wave field of a prismatic wave detection point with reverse extension under the undulating surface condition; calculating a multi-component imaging result of the prismatic wave in the curved coordinate system; transforming the multi-component imaging result of the prismatic wave in the curved coordinate system into one in a cartesian coordinate system; and outputting elastic prism wave reversetime migration imaging of a longitudinal and transverse wave deconstruction equation.

Description

technical field [0001] The invention relates to the field of petroleum geophysical exploration, in particular to an elastic prism wave reverse time migration imaging method based on the deconstruction equation of longitudinal and transverse waves in a curved coordinate system. Background technique [0002] The sharply undulating surface of the piedmont brings great difficulties to seismic imaging. Conventional seismic exploration uses reflected waves for imaging, but high and steep structures cannot be imaged. Therefore, high and steep structures can be imaged using prism wave information. Conventional prism wave imaging techniques are based on the acoustic wave approximation assumption to image single component seismic records , the shear wave information cannot be fully utilized. Contents of the invention [0003] The object of the present invention is to address the above-mentioned deficiencies, and propose a curved coordinate system-based longitudinal-short-wave syste...

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
CPCG01V1/36G01V2210/32G01V2210/51
Inventor 曲英铭李金丽孙文之周昌吾拉力
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