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

Seismic source linear scanning signal design method based on forced vibration

A technology of forced vibration and signal design, applied in the field of geophysical exploration, which can solve the problems of large energy difference and low effective output of a single shot

Pending Publication Date: 2021-07-30
CHINA PETROCHEMICAL CORP +2
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a linear scanning signal design method of a vibrator based on forced vibration to solve the problems of large energy differences and low effective output of vibroseis on different ground surfaces

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
  • Seismic source linear scanning signal design method based on forced vibration
  • Seismic source linear scanning signal design method based on forced vibration
  • Seismic source linear scanning signal design method based on forced vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] Such as figure 2 As shown, the forced vibration is that the vibration system is under the periodic external force, and the vibration that occurs is called forced vibration. The resonant (resonant) frequency is the inherent property of the forced vibration system. The forced vibration has the following regular characteristics :

[0036] when f 驱 = f 固 , the system reaches the resonance state A=A m ; f 驱 with f 固 The closer, the larger the amplitude of the forced vibration; f 驱 with f 固 The farther the difference is, the smaller the amplitude of the forced vibration is; when resonance occurs, within one cycle, the energy provided by the outside is equal to the energy consumed by the system to overcome resistance and do work.

[0037] During the vibration process of the vibrator, the part near the surface directly affected by th...

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 a seismic source linear scanning signal design method based on forced vibration and belongs to the technical field of geophysical exploration. According to the method, resonance frequencies and dominant frequency band ranges under different near-surface conditions are determined by analyzing the vibration characteristic information of a near-surface forced vibration system during scanning excitation of a vibroseis, and linear scanning signals suitable for different types of near-surface conditions are designed in combination with an effective wave frequency range. On one hand, energy of a dominant frequency band and an effective signal frequency band of a forced vibration system in a scanning signal is improved, limited excitation energy in scanning time is better inputted to the ground according to the characteristic that when the driving frequency of the forced vibration system is equal to the resonant frequency, the amplitude of the system is maximum, and energy transmission efficiency and the signal-to-noise ratio of a received record are improved; on the other hand, energy outside a scanning signal frequency band range is abandoned, the scanning duration is unchanged compared with linear scanning in production, and construction efficiency is guaranteed.

Description

technical field [0001] The invention relates to a design method of a seismic source linear scanning signal based on forced vibration, and belongs to the technical field of geophysical exploration. Background technique [0002] During the construction of vibroseis seismic data acquisition, the scanning signal excites seismic waves through the vibrator electric control system and hydraulic control system to drive the vibration system. The scanning signal is one of the key factors affecting the quality of seismic waves. Seismic waves propagate through the ground to the acquisition system of ground instruments, and are correlated by scanning signals to form a single-shot record. Due to the filtering effects of geophones, instruments, and ground absorption attenuation, the frequency spectrum of the obtained seismic records is narrowed and tends to be low-frequency, and these effects cannot be artificially changed. [0003] There are two types of vibroseis scanning signals: linea...

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): G01V1/24G01V1/28
CPCG01V1/24G01V1/28
Inventor 田新琦碗学俭张伟王宁许亚博康智清曹志刚刘明于冬梅师晨旭冯丽华吴树奎
Owner CHINA PETROCHEMICAL CORP
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