Synchronous acquisition and processing system of weak signals of three-dimensional sound wave near-probe 104 channels

A weak signal and synchronous acquisition technology, applied in seismic signal processing, seismic signal transmission, seismology for logging records, etc., to achieve good compression effect, improve logging efficiency, and reduce transmission volume

Active Publication Date: 2014-07-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

3D acoustic logging needs to collect 104 channel waveforms, which poses a great challenge to achieve the consistency of channel waveforms

Method used

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  • Synchronous acquisition and processing system of weak signals of three-dimensional sound wave near-probe 104 channels
  • Synchronous acquisition and processing system of weak signals of three-dimensional sound wave near-probe 104 channels
  • Synchronous acquisition and processing system of weak signals of three-dimensional sound wave near-probe 104 channels

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Embodiment

[0037] figure 1 is a schematic diagram of the structure of the three-dimensional acoustic logging tool;

[0038] Such as figure 1 As shown, the 3D acoustic logging tool uses three monopole transmitting transducers and two orthogonal dipole transmitting transducers to transmit acoustic signals, and uses a receiving array of thirteen sets of receiving transducers R1-R13 to receive acoustic signals . Among them, the three monopole emitters are the upper monopole emitter, the lower monopole emitter and the far monopole emitter, the upper monopole emitter and the lower monopole emitter are located at both ends of the receiver array, and the far monopole The emitter and two X, Y orthogonal dipole emitters are located farther down in the lower part of the instrument. Three monopole emitters are used to generate longitudinal waves, shear waves and Stoneley waves with different source distances, and X and Y dipole emitters are used to generate bending waves. The required multi-mode...

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Abstract

The invention discloses a synchronous acquisition and processing system of weak signals of three-dimensional sound wave near-probe 104 channels. The system comprises one control panel and 13 identical acquisition panels. After receiving a command sent by a ground system, an acquisition control module in the control panel initializes the 13 acquisition panels and configures related parameters of the 13 acquisition panels, weak signal synchronous acquisition and processing modules of the acquisition panels carry out counting according to initial pulses and returned pulses to obtain delay time, and when it is detected that the acquisition control module sends out an acquisition starting command, the 13 acquisition panels are delayed by corresponding time respectively and collect and send sound wave data. The acquisition control module receives sound wave data of the 104 channels of the 13 acquisition panels, a sound wave real-time lossless compression module is used for lossless compressing the data in real time and uploading the compression result, so that more accuracy sound wave signals and interval transit time information are obtained, transmission quantity of the sound wave data is reduced, and well logging efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of weak signal acquisition and processing, and more specifically relates to a system for synchronous acquisition and processing of weak signals of 104 channels of a three-dimensional sound wave near the probe. Background technique [0002] 3D acoustic logging is a new generation of acoustic logging technology developed on the basis of orthogonal dipole acoustic logging technology. Its measurement principle is to use all current acoustic waves, namely monopole, dipole and Stoneley The waveforms of various frequency bands are comprehensively measured to obtain the three-dimensional acoustic wave characteristics of the formation, that is, the longitudinal wave time difference, shear wave and Stoneley wave changes in the axial, radial and circumferential directions of the wellbore, and provide a complete description of the azimuth of the formation characteristics. Through this technique, the anisotropy of homoge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01V1/22G01V1/28
Inventor 师奕兵张伟张伟杰蒋天植马东蒲利程瑶
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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