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

Three-dimensional wave equation mixed grid finite difference numerical simulation method and device

A finite difference and wave equation technology, applied in seismic signal processing and other directions, can solve the problems of numerical dispersion, low simulation accuracy, and small contribution to simulation accuracy, and achieve the effect of reducing numerical dispersion and improving numerical simulation accuracy.

Active Publication Date: 2020-07-10
PETROCHINA CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the numerical simulation of the wave equation, the accuracy of the numerical simulation is mainly improved by increasing the value of M. However, with the increase of the value of M, the distance between the newly added grid points on the coordinate axis and the center becomes smaller. The farther and farther away, the contribution to the improvement of simulation accuracy is getting smaller and smaller, and there is serious numerical dispersion, and the simulation accuracy is low

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
  • Three-dimensional wave equation mixed grid finite difference numerical simulation method and device
  • Three-dimensional wave equation mixed grid finite difference numerical simulation method and device
  • Three-dimensional wave equation mixed grid finite difference numerical simulation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0071] The numerical simulation of the wave equation plays an important role in the process of seismic exploration and oil and gas development. Through the numerical simulation of the wave equation, the propagation law of seismic waves in the medium can be obtained. The embodiment of the present invention adopts the finite difference meth...

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 application provides a hybrid grid finite-difference numerical simulation method and device of a three-dimensional wave equation. The method includes: constructing a three-dimensional hybrid gridfinite difference format including grid points on a coordinate axis and a non-coordinate axis in a three-dimensional rectangular coordinate system; according to the three-dimensional hybrid grid finite difference format, carrying out finite difference dispersion on a three-dimensional wave equation to obtain a finite difference discrete equation of the three-dimensional wave equation; according tothe finite difference discrete equation and a plane wave theory, calculating a differential coefficient of the finite difference discrete equation; and calculating the finite difference discrete equation based on the differential coefficient to realize numerical simulation of the three-dimensional wave equation. With the hybrid grid finite-difference numerical simulation method provided by the application, the numerical frequency dispersion of the numerical simulation of the three-dimensional wave equation is reduced effectively; and the numerical simulation accuracy of the three-dimensionalwave equation is improved.

Description

technical field [0001] The application belongs to the technical field of seismic wave numerical simulation, and in particular relates to a three-dimensional wave equation mixed grid finite difference numerical simulation method and device. Background technique [0002] The wave equation is an important partial differential equation, which usually describes the wave propagation process in the medium. The wave equation numerical simulation is an important basis for seismic exploration and seismology, and it can simulate and study the propagation laws of seismic waves in various underground media. The wave equation numerical simulation can be used in the design and evaluation of field observation systems, can test the correctness of various inversion methods, and can test the correctness of seismic interpretation results. It is the basis and basis of reverse time migration and full waveform inversion. key link. [0003] In the prior art, the finite difference method is curren...

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): G01V1/30
CPCG01V1/30
Inventor 胡自多刘威王艳香韩令贺杨哲王述江
Owner PETROCHINA CO LTD
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