Minimum phase infinite impulse response filtering method and filtering system

Abstract

The invention discloses a minimum phase infinite impulse response filtering method and filtering system. The method comprises the following steps: converting seismic data in a time domain into seismicdata in a frequency domain; converting the filtering factor of the time domain into a filtering factor of the frequency domain; filtering the seismic data of the frequency domain based on the filtering factor of the frequency domain to obtain filtered seismic data of the frequency domain; and converting the filtered seismic data of the frequency domain into filtered seismic data of the time domain. Interference existing in original field single shot data is filtered through the minimum phase infinite impulse response filter, noise interference is eliminated, effective signals are exposed outof noise, and the method has a very good application effect on noise interference in a single shot collected in the field of an exploratory area.

Description

technical field [0001] The invention belongs to the field of seismic exploration data processing, and in particular relates to a minimum phase infinite impulse response filtering method and a filtering system. Background technique [0002] Now there are many filtering technologies in the field of seismic exploration, such as simple pulse filtering, FK filtering, Taup filtering, dip filtering, etc., but the types of noise targeted by different filtering technologies are not the same, and some are aimed at regular interference, such as linear noise, low frequency Interference, industrial electrical interference, etc., some are aimed at irregular interference; in addition, these filtering techniques are aimed at different seismic data processing stages, for example, some are for pre-stack data, and some are for post-stack data. In the pre-stack data processing, these technologies are mostly aimed at single-shot data collected and decompiled from the field, but for the interfere...

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Problems solved by technology

In the pre-stack data processing, these technologies are mostly aimed at single-shot data collected and decompiled from the field, but for the interference in the first-hand data collected from the field, the effect of these filtering technologies is often not ideal, due to field construction Factors such as components, vehicle horns, human interference, etc., cause these interferences on the single seismic shot. They have different speeds and shapes, and it is difficult to filter them according to their speed or inclination angle.

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