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

A method and device for determining a near-surface velocity model

A velocity model and near-surface technology, applied in the field of geophysical exploration, can solve the problems of low accuracy of near-surface velocity model and particularly obvious performance

Active Publication Date: 2018-01-05
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The near-surface velocity model constructed by first-arrival travel-time tomographic inversion can well reflect the spatial variation trend of near-surface velocity. The accuracy of the near-surface velocity model is often not high, especially at the shallow surface

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 method and device for determining a near-surface velocity model
  • A method and device for determining a near-surface velocity model
  • A method and device for determining a near-surface velocity model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] 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 making creative efforts shall fall within the scope of protection of this application.

[0035] figure 1 It is a flow chart of a method for determining a near-surface velocity model provided in an embodiment of the present application. Although the processes described below include multiple operations occurring in a particular order, it should be clearly understood that these processes may include more or fewer operat...

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 present application provides a method and device for determining a near-surface velocity model. The method includes processing the surface survey data and seismic data of the area to be measured respectively to obtain a corresponding near-surface first velocity model and a second velocity model, and then the second velocity model can be used to carry out the first velocity model Space constraints, removing inaccurate data in the first speed model and constructing an initial speed model based on the first speed model after data removal. The initial velocity model can then be iteratively corrected using the calculated weighting factors. The embodiments of the present application provide a method and device for determining a near-surface velocity model, which can improve the accuracy of the near-surface velocity model.

Description

technical field [0001] The present application relates to the technical field of geophysical exploration, in particular to a method and device for determining a near-surface velocity model. Background technique [0002] In the field of geophysical exploration technology, the near-surface velocity model not only affects the excitation and reception of seismic waves in seismic exploration, but also affects the signal-to-noise ratio of the acquired raw data. Therefore, it is of great significance to understand the near-surface velocity model for the excitation problem in seismic acquisition, the static correction problem in data processing, and the wave field continuation problem. [0003] Currently, near-surface velocity models can be constructed using microlog data or small refraction data for surveying the near-surface. Among them, the vertical sampling interval of the micro-logging data is generally small, and the signal-to-noise ratio of the first arrival is high. Althoug...

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): G01V1/28G01V1/36
Inventor 马青坡祖云飞冯泽元封若武王珂佟英娜
Owner BC P INC CHINA NAT PETROLEUM CORP