Device and method for quickly identifying transverse waves on seismic monitoring records

Abstract

The invention discloses a device and a method for quickly identifying transverse waves on seismic monitoring records. The method comprises the steps of: setting two three-component geophones at the same detection point position, so that X component directions and Y component directions of the two three-component geophones are opposite, and Z component directions are identical, wherein X componentsmainly record transverse waves in a surveying line direction, Y components mainly record transverse waves in a vertical surveying line direction, and Z components mainly record longitudinal waves ina vertical direction; connecting the three-component geophones with a seismometer by means of jug lines, and exciting seismic waves to obtain three-component monitoring records of the two three-component geophones at the same detection point position; and determining the presence and absence of the transverse waves according to whether polarities recorded by the X components and the Y components on the monitoring records are opposite, thereby realizing quick detection of the transverse waves or converted waves. The device and the method can quickly identify the transverse waves or converted waves on the three-component monitoring records in a field construction site, so as to perform construction quality monitoring.

Description

technical field [0001] The invention relates to the field of multi-wave and multi-component seismic exploration, in particular to a device and method for quickly identifying shear waves on seismic monitoring records. Background technique [0002] In accordance with the requirements of seismic exploration specifications or procedures, seismic instrument operators or technicians need to identify longitudinal waves, shear waves or converted shear waves from multi-component seismic records for each shot fired in the field test and formal online construction of multi-wave and multi-component seismic exploration. In order to quickly judge whether the acquisition parameters during construction have met the specifications and design requirements, and perform a seismic record quality rating, if there is no shear wave or converted wave, it will be evaluated as a waste shot. It is necessary to analyze the cause on site, improve the design plan, and re-construct. If the longitudinal wav...

AI Technical Summary

Problems solved by technology

Usually, due to the fast speed, strong energy, and high signal-to-noise ratio of longitudinal waves, it is easy to identify in three-component monitoring records, but the shear wave or converted wave is slow in speed, weak in energy, and low in signal-to-noise ratio, so it is difficult to identify them in three-component monitoring records. very difficult

[0006] At present, it is difficult to identify shear waves or converted waves in multi-wave and multi-component seismic exploration field construction sites, and on-site instrument operators or technicians cannot perform on-site ratings on monitoring records according to the requirements of specifications or regulations

The construction data needs to be sent to the data processing center for complex multi-wave and multi-component data processing before it can be completed, which takes a long time, which is unacceptable for the time cost of field construction

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