Seismic exploration data acquisition and processing method and device

Abstract

The invention provides a seismic exploration data acquisition and processing method and device. The method comprises steps: the main clock time of a central control unit of a seismic data acquisitionsystem is acquired, and the error value between the main clock time and the time reference of a GPS disciplined clock is calculated; the frequency of a pulse width manager of the central control unitis adjusted according to the error value, and the adjustment frequency of the central control unit is acquired; according to the adjustment frequency, the time scale of a data flow acquired in a seismic data acquisition system is adjusted; and according to the time scale corresponding to the data flow, the seismic data are acquired. By using each embodiment in the invention, the accuracy of the time scale of the data flow in the seismic data acquisition system can be improved, precise synchronization between the seismic data acquisition system and an excitation terminal is realized, the accuracy of the seismic exploration data is improved, and high-precision time information can be provided for subsequent data segmentation and data correlation operations.

Description

technical field [0001] The application belongs to the technical field of seismic exploration, and in particular relates to a seismic exploration data acquisition and processing method and device. Background technique [0002] With the continuous improvement of seismic exploration accuracy, the clock accuracy of exploration instruments and the means of data acquisition time control are particularly important. With the application of high-density and high-efficiency data acquisition technology, both wireless data acquisition stations (node ​​instruments) and wired data acquisition instruments have begun to be produced in the form of continuous data recording, and at the same time use vibrators and explosive excitation sources to operate independently and efficiently. The production mode of continuous data recording, realizing the time synchronization between the data acquisition end and the data excitation end, and improving the accuracy of the data at the data acquisition end...

AI Technical Summary

Problems solved by technology

2. Start data acquisition and excitation synchronization according to the precisely specified time (based on GPS time). Since the A / D (Analog / Digital, analog-to-digital conversion) master clock will generate cumulative errors over time, resulting in a The number of data collection points has changed

The above method may cause a maximum difference of half a sampling period between the source excitation time and the data acquisition time, which will affect the accuracy of the collected seismic data and the accuracy of seismic exploration.

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