Sound wave far detection imaging noise reduction processing method and device

A technology of noise reduction processing and remote detection, which is applied in the direction of measuring devices, seismic signal processing, geophysical measurement, etc., can solve the problems of adverse effects of remote detection imaging interpretation, strong noise interference, low signal-to-noise ratio, etc., to improve visual quality , the effect of improving quality and reliability

Inactive Publication Date: 2021-07-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and device for noise reduction processing of acoustic wave far detection imaging to improve the quality of far detection imaging, to solve the

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
  • Sound wave far detection imaging noise reduction processing method and device
  • Sound wave far detection imaging noise reduction processing method and device
  • Sound wave far detection imaging noise reduction processing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Such as figure 1 As shown, the present invention proposes a method for noise reduction of acoustic wave remote detection imaging, and the workflow is as follows:

[0030] Step 1. Using the array acoustic wave instrument to perform well logging within the detection depth interval, and collect array acoustic wave data along the well axis.

[0031] Step 2: Carry out common center point stacking on the array acoustic wave data to obtain a common center point stacking profile (CPM). The superposition section of the common center point can be calculated by the following formula:

[0032]

[0033] where D is the stacking times of logging reflected waves.

[0034] Step 3: Perform noise reduction processing on the post-stack profile in step 2 to obtain a de-noised stack profile.

[0035] Step 4: Perform migration imaging processing on the post-stack profile in step 3 to obtain a post-migration time profile. The purpose of migration imaging is the homing of reflected waves...

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 a sound wave far detection imaging noise reduction processing method and device. The method comprises the following steps that: step 1, logging in a detection depth interval through an array sound wave instrument; step 2, performing common midpoint superposition on the array sound wave data acquired in the step 1 to obtain a common midpoint superposition section; step 3, carrying out noise reduction processing on the stacked section in the step 2 to obtain a stacked section after noise reduction; step 4, performing migration imaging processing on the stacked profile in the step 3 to obtain a profile after migration; step 5, performing noise reduction processing on the offset section in the step 4 to obtain a noise-reduced offset time section; and step 6, performing time-depth conversion on the migration profile in the step 5 to obtain a depth domain imaging profile. According to the invention, the technical problems of strong noise interference, low signal-to-noise ratio, impulse noise and offset illusion on remote detection imaging interpretation and the like can be solved.

Description

technical field [0001] The invention belongs to the field of borehole geophysics, and in particular relates to a method and device for noise reduction processing of remote detection imaging. Background technique [0002] Acoustic remote detection logging can image the geological structure within tens of meters around the well, and obtain information such as the position, dip and azimuth of the geological body away from the well, filling the gap in the detection scale between seismic and logging. It plays an important role in the detection of fractures and caves outside wells and the evaluation of fracturing effects in unconventional oil and gas reservoirs. [0003] Acoustic remote detection uses formation reflection waves, and its biggest difficulty is: limited by the conditions in the well and the strong interference of the wellbore direct wave, the reflected wave signal of the geological body outside the well is only tens to several hundredths of the wellbore direct wave ...

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): G01V1/48
CPCG01V1/48G01V2210/514
Inventor 李盛清唐晓明苏远大庄春喜
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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