Multi-wave seismic data matching method and device based on small-layer waveform correction

Abstract

The invention provides a multi-wave seismic data matching method and device based on small-layer waveform correction. The method comprises the steps: carrying out initial matching on PP wave data andPS wave data in multi-wave seismic data of the same target geological area; if the seismic section corresponding to the PS wave data after initial matching has local distortion relative to the seismicsection corresponding to the PP wave data, flattening waveform data at the same position of transverse waves of the PP wave data and the PS wave data by taking longitudinal wave channel data of the PP wave data and the PS wave data as a reference; sequentially obtaining the displacement of the leveled waveform data, and carrying out the small-layer leveling of the longitudinal wave and the transverse wave according to each displacement, so as to eliminate the local distortion of a seismic section corresponding to the PS wave data. The method and device can effectively eliminate the local distortion phenomenon of the PS wave data after the initial matching of the multi-wave seismic data, and achieves the fine matching of the small-layer multi-wave data of the multi-wave seismic data.

Description

technical field [0001] The present application relates to the technical field of petroleum exploration, in particular to a multi-wave seismic data matching method and device based on sub-layer waveform correction. Background technique [0002] In oil and gas seismic exploration, in addition to applying conventional seismic reflection longitudinal wave (hereinafter referred to as PP wave) data for geological structure and reservoir research, it is also necessary to combine converted shear wave (hereinafter referred to as PS wave) seismic data for comprehensive research , especially in the fields of gas cloud imaging, fracture prediction, lithology and fluid identification. This technique of using PP wave and PS wave seismic data for comprehensive geological analysis is called multi-wave seismic interpretation. Due to the difference in the underground propagation speed of PP wave and PS wave, the two sets of seismic data of PP wave and PS wave have obvious difference in time ...

AI Technical Summary

Problems solved by technology

[0003] The multi-wave matching technology mainly includes interpretation horizon matching (horizons are interpreted horizons on the PP wave seismic section and PS wave seismic section respectively) and point-by-point interactive matching (respectively on the PP wave seismic section and the PS wave seismic section A comparison point belonging to a geological reflection interface is established on the profile), and these methods are used to initially match the PP wave and PS wave data. After the initial matching, the geological reflection interface of the large set of PP wave and PS wave data can be basically consistent. The control points for data matching are discretely distributed both longitudinally and laterally, which results in PS wave data after matching. Seismic events (peaks with the same vibration phase in each channel on the seismic record) will occur to varying degrees in some areas. or trough connection), see image 3 , so further and more accurate multi-wave data matching methods are needed

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