Method for reducing shot supplement rate of efficient acquisition vibroseis

Abstract

The invention discloses a method for reducing the shot supplement rate of efficient acquisition of a vibroseis, is applied to the field of acquired data field quality control in geophysical exploration, and aims to solve the problems that the requirement of efficient acquisition of the vibroseis in a complex earth surface area cannot be met and the influence of shot supplement construction on production efficiency and progress cannot be reduced in the prior art. The method comprises the following steps: firstly, acquiring an SPS file of an instrument finished wire harness, then eliminating focus state overrun, COG overrun, an arrangement problem, repeated points and the like, comparing with pre-designed SPS point positions, and outputting two sets of SPS files of finished shot points and supplementary shot points; secondly, extracting a supplementary shot point from the expanded QC file with the converted format to obtain a supplementary shot rate; by adopting the method, the shot refilling rate can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of on-site quality control of collected data in geophysical exploration, and in particular relates to a technology that can effectively reduce the seismic source supplementary shot rate in the efficient acquisition of vibroseis on the large desert surface. Background technique [0002] In the current mainstream vibroseis + wired instrument seismic exploration, the encoder installed on the instrument vehicle and the decoder installed in the cab of each source vehicle are connected through digital radio communication to carry out the source vibration command (command the source to start scanning ) and the source status (output, distortion, phase and vibration coordinates) and other information after each earthquake scan is sent back to the instrument in real time. After quality control, it is determined that the indicators of the earthquake meet the construction requirements. Move the point for the construction of the n...

AI Technical Summary

Problems solved by technology

[0003] Because the communication between the seismic source (decoder) and the instrument (encoder) is based on digital radio communication, but when the surface of the work area has large fluctuations or there are many obstacles, it is difficult to ensure that the seismic source is compatible with the instrument during construction at all shot points. good communication status

During the seismic acquisition construction, the communication effect and communication distance can be improved to a certain extent by setting up a relay station and continuously adjusting the position of the relay station, but it is difficult to completely eliminate the problem of radio communication limitation

After the construction of the seismic source is completed every day, the quality control will be carried out on the construction status of all the shot points of the seismic source back to the instrument, mainly including the output, distortion, phase and distance difference from the design point (COG, Center of Gravity) of each earthquake. When there are over-limit points, it is required to carry out re-cannon construction in the field, which seriously affects the production efficiency and progress

[0004] Existing technologies cannot meet the needs of high-efficiency acquisition by vibrators, and cannot reduce the impact of supplementary shot construction on production efficiency and progress

Images