Seismic data processing method for improving resolution, medium, terminal and device

Abstract

The invention discloses a seismic data processing method for improving resolution, a medium, a terminal and a device. The method comprises the steps of carrying out spectral decomposition of an original time domain signal through Gabor transform, and extracting at least one average Q value from an initial time-frequency spectrum; inverting the average Q value to generate an interlayer Q value; performing inverse Q filtering on the initial time-frequency spectrum by adopting an interlayer Q value to generate a new time-frequency spectrum; and converting the new time-frequency spectrum into a time-domain signal after inverse Q filtering compensation through Gabor inverse transform. According to the method, spectral decomposition is carried out by adopting short-time Gabor transform, and a weighted amplitude factor is adjusted in data in a short-time window, so that the problem that a deconvolution or deQ filtering operator is difficult to calculate accurately is avoided; and meanwhile, by adjusting the coefficients in the sub-bands in the frequency domain, signals in all the bands are recovered, low frequency is kept, high frequency is enhanced, and the purpose of improving the resolution of the shallow ground fracture stratum is achieved.

Description

【Technical field】 [0001] The invention relates to the field of seismic data processing, in particular to a seismic data processing method, medium, terminal and device for improving resolution. 【Background technique】 [0002] High resolution is the eternal goal pursued by the exploration and development of shallow underground space (0-50 meters). Due to the small size and scale of shallow ground fissures, the exploration of shallow ground fissures requires an extremely wide frequency band, while artificially excited frequency bands are narrow, and the energy of low-frequency and high-frequency components is weak. Indoor data processing methods are usually used to widen the frequency band. At present, the most commonly used methods to improve the resolution of ground fissures in shallow seismic exploration, such as deconvolution, inverse Q filtering and other frequency extension techniques, can improve the resolution to varying degrees, but due to the heterogeneity of shallow ...

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Problems solved by technology

At present, the most commonly used methods to improve the resolution of ground fissures in shallow seismic exploration, such as deconvolution, inverse Q filtering and other frequency extension techniques, can improve the resolution to varying degrees, but due to the heterogeneity of shallow strata, physical stratification is not Obviously, the deconvolution operator and Q value are not easy to obtain accurately. While widening the frequency band, the wavelet sidelobe increases and increases, reducing the signal-to-noise ratio and fidelity

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