Unlock instant, AI-driven research and patent intelligence for your innovation.

An imaging method of anisotropic media

An anisotropy and imaging method technology, applied in the field of geophysical exploration, can solve the problems of reducing the accuracy and precision of imaging, ignoring the anisotropy of the medium, and the deviation between the simulation wave field and the real wave field propagation process, so as to improve the resolution High efficiency and fidelity, event amplitude equalization, low noise effect

Inactive Publication Date: 2019-09-06
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

[0003] However, the defect in the existing technology is that in the usual inversion process, the isotropy of the subsurface medium is mostly assumed, and the anisotropy of the medium is ignored, resulting in a deviation between the simulated wave field and the real wave field during the propagation process. Reduced accuracy and precision when imaging

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 imaging method of anisotropic media
  • An imaging method of anisotropic media
  • An imaging method of anisotropic media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An imaging method for anisotropic media, such as figure 1 shown, including the following steps:

[0019] S1, Obtain observation data, obtain the velocity field and anisotropy parameters according to the observation data.

[0020] Observational data d obs Obtained according to the anisotropic Hess model, the model is mainly composed of the high-speed body mound on the left, the strong anisotropic anomaly body in the middle, and the high and steep faults on the right. The size of the model is 901-376, and the vertical and horizontal grid spacing is 10m.

[0021] There are 151 shots in total, and 401 channels are received for each shot. The rolling observation system is adopted to receive on both sides of the shot in the middle, with a shot interval of 60m and a track interval of 10m. The recording time is 3s, and the time sampling interval is 3ms. According to the velocity and anisotropy parameters obtained from the model, Recke wavelet is used for forward modeling, a...

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 an anisotropic medium imaging method which includes the following steps: S1. acquiring observation data, and based on the observation data, acquiring a velocity field and an anisotropic parameter; S2. migrating the observation data to obtain a reflection coefficient; S3. based on the velocity field and the anisotropic parameter, demigrating the reflection coefficient to obtain simulated data; S4. computing the data residual error between the observation data and the simulated data; and S5. based on the data residual error, acquiring a final imaging result. According to the invention, the method herein fully takes the anisotropic characteristics of underground medium into consideration, can more accurately simulate the pattern of how seismic wave travels in actual underground medium, further increases the resolution and fidelity of the migration imaging result, such that event amplitude at different depths in the migration imaging result is more balanced and the imaging result is more accurate.

Description

technical field [0001] The invention relates to an imaging method for anisotropic media, belonging to the field of geophysical exploration. Background technique [0002] Anisotropic media are geophysical media whose physical properties have directional characteristics. Usually, underground sedimentary strata are mostly distributed in layers, presenting the characteristics of a transversely isotropic (VTI, vertical transverse isotropic) medium. With the development of high-precision seismic exploration technology, anisotropic media imaging methods that can more truly and comprehensively reflect the propagation of seismic waves in the underground have attracted more and more attention. In the current subsurface medium inversion process, iterative algorithms are usually used to obtain imaging results. [0003] However, the defect in the existing technology is that in the usual inversion process, the isotropy of the subsurface medium is mostly assumed, and the anisotropy of th...

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): G01V1/34
Inventor 朱峰黄建平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)