Seismic exploration system and processing method of acquired data thereof

A technology for seismic exploration and seismic data, applied in the field of seismic exploration, can solve the problems of low accuracy of seismograph positioning information, instrument drift error, etc., achieve high-precision positioning, and weaken satellite clock errors.

Pending Publication Date: 2021-12-17
南京天巡遥感技术研究院有限公司
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Problems solved by technology

However, due to changes in working temperature, working status, etc., when working for a long time, the local clock of the instrument will drift and cause large errors
In addition, the positioning information accuracy of the above-mentioned seismograph is not high in positioning processing

Method used

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  • Seismic exploration system and processing method of acquired data thereof
  • Seismic exploration system and processing method of acquired data thereof
  • Seismic exploration system and processing method of acquired data thereof

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Embodiment Construction

[0040] The present invention is described in further detail now in conjunction with accompanying drawing.

[0041] like figure 1 As shown, the seismic prospecting system of the present invention mainly includes a control center, GPS satellites, a mobile station, a reference station, and several acquisition nodes. During seismic exploration, the mobile station, the reference station, and several acquisition nodes are deployed in the field. Among them, the components of the acquisition node are as follows: figure 2 As shown, it mainly includes the central control unit MCU, GPS module, TCXO crystal oscillator, storage module, power supply, DAC module and ADC module. Among them, the power supply is responsible for supplying power to the entire acquisition node; the central control unit MCU is responsible for managing the data acquisition tasks of the node; the TCXO crystal oscillator provides time service and standard time reference for the DAC module and the ADC module; the DAC...

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Abstract

The invention particularly relates to a seismic exploration system and a processing method of acquired data thereof. In the aspect of time synchronization, the whole seismic data is marked in real time by using a TCXO crystal oscillator with low power supply voltage and high reliability, the accuracy only depends on the GPS precision and the clock period of a data acquisition system, and the stability is not weakened along with the change of the working time and space of an acquisition node. In the aspect of positioning, a satellite clock error, a receiver clock error, an ionosphere delay error and a troposphere delay error are weakened by using a carrier phase and pseudo-range observation double-difference combination method, random interference is eliminated by using a Kalman filtering algorithm, the positioning precision is improved, and the method can be used for a high-density seismic exploration array.

Description

technical field [0001] The invention belongs to the field of seismic exploration, and in particular relates to a seismic exploration system and a processing method for collecting data. Background technique [0002] Seismic exploration is currently the most important oil exploration method. During work, sensor nodes are usually densely arranged in mountainous areas and other complex terrain exploration areas of tens of kilometers. The source excites multiple seismic waves, and all sensor nodes record seismic data in real time. A dense seismic node observation system has been formed to realize the fine detection of underground geological structures. At the end of the acquisition task, all nodes perform centralized seismic data download, and then perform unified processing and interpretation of a large amount of seismic data. The seismic data with poor synchronization ability will cause considerable errors in the later processing of seismic data. On the one hand, as the acquis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/00G01V1/28G01S19/44
CPCG01V1/00G01V1/28G01S19/44
Inventor 吴宪云
Owner 南京天巡遥感技术研究院有限公司
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