Angle gather ray chromatography migration velocity analyzing method and device

A technology of migration velocity analysis and ray tomography, which is applied in the field of seismic exploration data processing to achieve the effect of improving accuracy, reducing subjective activity, and avoiding manual participation.

Active Publication Date: 2015-01-07
PETROCHINA CO LTD
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art, the present invention proposes a method and device for angle gather ray tomographic migration velocity analysis, which solves the problem of estim

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
  • Angle gather ray chromatography migration velocity analyzing method and device
  • Angle gather ray chromatography migration velocity analyzing method and device
  • Angle gather ray chromatography migration velocity analyzing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] like figure 1 Shown is a schematic diagram of the working principle of the technical solution. The working principle of this technical solution is: starting from the initial velocity model, pre-stack depth migration processing is performed on the pre-processed field-acquired seismic data to obtain migration profiles and angle-domain imaging gathers. Whether the event is horizontal is used to measure the quality of the velocity model. If the event is ho...

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 relates to an angle gather ray chromatography migration velocity analyzing method and device. The method includes utilizing a velocity model to perform migration processing on outdoor collected seismic data after being preprocessed to acquire migrated section and angle domain imaging gather; judging whether an event in the angle domain imaging gather is horizontal or not; if not, updating the velocity model. A method for updating the velocity model includes scanning reflection faces of the migrated section to acquire reflection face inclination angles; selecting points on the reflection faces of the migrated section as reflection points, acquiring residual curvature of the reflection points, automatically picking imaging depth of the reflection points on the angle domain imaging gather by taking the residual curvature as a constraint condition, and acquiring imaging depth difference at different reflection angles; screening out the reflection points meeting quality monitoring criteria; tracking ray paths corresponding to different reflection angles by utilizing the reflection face inclination angles corresponding to the selected reflection points, acquiring a reflection chromatography kernel function, and building a chromatography equation set; acquiring updating quantity of the velocity model, and updating an initial velocity model.

Description

technical field [0001] The invention relates to the technical field of seismic exploration data processing, in particular to a method and device for analyzing angular gather ray tomography migration velocity. Background technique [0002] The quality of the background velocity field is a prerequisite for the quality of the migration. The application of velocity modeling in the industry has developed from an analytical approach to an inversion approach. Compared with analytical methods, tomographic inversion methods have smaller assumptions and higher velocity modeling accuracy. Compared with other inversion-like velocity modeling methods, ray tomographic migration velocity analysis in angle gathers is widely used in actual production as an inversion-like velocity modeling method. [0003] In the 1960s, tomography technology was developed in the medical field, introduced into geophysics in the 1970s, and ray tomography technology was developed and perfected in the 1980s. I...

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): G06F19/00G01V1/30G01V1/34
Inventor 胡英张才首皓徐凌王春明李萌
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap