Method for dividing and processing earthquake data

Abstract

A method for decomposing the data of earthquake comprises the following steps: (i) collecting the data of earthquake with an earthquake exploration device; (ii) executing an observing system defining to the original data; (iii) executing frequency analysis and frequency scanning to confirm the construction degree of each frequency band to the geological structure; (iv) decomposing the single-shot data which passes the defining of observing system to different frequency bands; (v) executing procedures of amplitude compensation to the earthquake data, deconvolution, static correction, horizontal stacking and excursion imaging to the decomposed data object sequentially; (vi) combining the decomposed data object to compose a final offset data object; and (vii) executing wave filtering and processing gain to the combined offset data object, and taking the obtained offset data object for explaining the earthquake data. The invention settles the problem that the imaging of the deep complex construction in the low signal-to-noise ratio information is unclear as the imperfect consideration of conventional processing method to different frequency component. The imaging effect of the final process earthquake data is better. The processing quality is greatly improved and the imaging of middle stratum and deep stratum are contributed greatly.

Description

technical field [0001] The invention relates to a seismic data processing method, in particular to a seismic data splitting and processing method for improving the precision of seismic exploration in oil and gas exploration and development. Background technique [0002] Reflected wave seismic data processing technology is an important technology in geophysical exploration, and occupies an important position in the field of petroleum exploration. [0003] Seismic exploration is to lay out survey lines, artificially stimulate seismic waves in areas with oil and gas prospects initially determined by geological work and other geophysical prospecting work, and record the propagation of seismic waves with field seismographs. Then, according to the propagation theory of seismic waves, use digital electronic The computer performs all kinds of processing work on the original data obtained in the field, removing the false and retaining the true, and further studies the propagation of ...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned technical problems, the present invention proposes a data splitting and processing method for seismic data. Using this method can solve the problems caused by the lack of consideration of different frequency components in conventional processing methods, resulting in complex deep layers in low signal-to-noise ratio data. The problem of unclear structure imaging

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