A Time-varying Deconvolution Method Based on Seismic Event Axial Subspectrum

Abstract

The invention relates to a time-varying deconvolution method based on seismic in-phase axis wavelet spectrum, belonging to the field of seismic exploration. The method specifically comprises the following steps: firstly, using a seismic in-phase axis tracking technology to obtain in-phase axes corresponding to different strata, and then, based on the in-phase axis, realizing extraction of the seismic in-phase axis wavelet spectrum; for each of the in-phase axes in the seismic record, generating a desired wavelet spectrum correction factor by using the desired wavelet spectrum and the wavelet spectrum of the extracted in-phase axis, and combining the desired wavelet spectrum correction factors of different in-phase axes on the same seismic trace to obtain a deconvolution factor of the entire seismic trace, and finally, realizing the deconvolution calculation process based on the deconvolution factor. According to the method of the invention, the seismic in-phase axis wavelet spectrum corresponding to different strata can be well extracted, and targeted deconvolution processing is realized in combination with the characteristics of different strata, so that the seismic recording resolution is higher, the needs for high-resolution seismic exploration can be more adapted to, which lays a good foundation for the subsequent seismic exploration processing and inversion interpretationwork.

Description

technical field [0001] The invention belongs to the field of seismic exploration, and in particular relates to a time-varying deconvolution method based on the seismic co-phase axial sub-wave spectrum. Background technique [0002] In seismic data processing, deconvolution is one of the most commonly used and important processing methods. It can be used for pre-stack or post-stack. Its main function is to compress the seismic wavelet and compare the wavelet with the reflection coefficient Separation, thereby improving the vertical resolution of seismic data, thereby improving the accuracy of data interpretation, and providing processing methods for fine oilfield exploration and development. Therefore, seismic exploration workers have been working on improving deconvolution processing methods for many years, which has led to rapid development of deconvolution technology. [0003] At present, there are many deconvolution methods. The conventional deconvolution processing meth...

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Problems solved by technology

However, this method is limited to wavelet extraction and deconvolution processing in different time windows divided on the seismic section, and cannot comprehensively process the entire seismic trace, and the calculation efficiency is low; It may contain information of multiple strata. This method of extracting seismic wavelets in a given time window is difficult to effectively reflect the wavelet characteristics of different strata, and it is difficult to ensure that the deconvolution processing effects of events corresponding to different strata are uniform. people are satisfied

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