Method and device for attenuation of subsequent arrivals

Abstract

The invention provides a secondary wave attenuation processing method and a secondary wave attenuation processing device. The secondary wave attenuation processing method comprises the steps of: identifying secondary wave data in seismic data to be analyzed according to logging data, geological stratification data and seismic materials; picking up a target position according to the secondary wavedata; establishing a stratigraphic model according to the target position and the secondary wave data; performing noise prediction processing according to the stratigraphic model to obtain predicted noise data; matching the predicted noise data with the seismic data to be analyzed to obtain matched noise data; and performing secondary wave noise attenuation processing according to the seismic datato be analyzed and the matched noise data, so as to obtain noise attenuation seismic data. By utilizing the secondary wave attenuation processing method and the secondary wave attenuation processingdevice in the invention, the secondary wave noise in the seismic data is attenuated, and the precision of seismic data processing and interpretation is improved.

Description

technical field [0001] The present application belongs to the technical field of petroleum exploration, and in particular relates to a method and device for processing continuous wave attenuation. Background technique [0002] In the prior art, well logging technology and seismic data can be used for oil and gas exploration. Specifically, according to the seismic data, the section map of the seismic wave can be obtained, and the geological structure can be analyzed according to the section map, and oil and gas exploration can be carried out. Through processing, interpreting and analyzing the seismic data from different basins, it is found that in the middle of the original seismic data, a set of seismic waves with the same occurrence, low frequency and strong amplitude as the strong interface reflection stratum often develops in the stratum underlying the strong wave impedance interface. The seismic wave is generated by the follow-up wave, and the seismic wave brought by th...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, it is difficult to take targeted measures due to the lack of understanding of the regional geological background by the processing personnel

Moreover, in the processing flow of the existing technology, such as: frequency-increasing processing, it is easy to make these low-frequency continuous arrivals evolve into high-frequency noise, and the phenomenon of cross-layering with the real formation makes it more difficult for processing interpreters to distinguish

Or the overall low-frequency filtering of these low-frequency noises can achieve a certain attenuation effect, but it is easy to cause loss of low-frequency active components in deep formations, so the two methods cannot achieve the purpose of attenuating continuous wave noise and retaining effective signals.

Images