Seismic imaging method and device based on data fusion,equipment and storage medium

A technology of data fusion and imaging method, which is applied in the field of seismic exploration, can solve the problems of serious high-frequency attenuation and unfavorable problems of medium and deep seismic data, and achieve high fidelity, good imaging effect, and good continuity of event axis
CN113222029APending Publication Date: 2021-08-06CNOOC TIANJIN BRANCH +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CNOOC TIANJIN BRANCH
Publication Date
2021-08-06

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Abstract

The embodiment of the invention discloses a seismic imaging method and device based on data fusion, equipment and a storage medium. The method comprises the following steps: performing preprocessing based on acquired first seismic data and second seismic data to respectively obtain corresponding third seismic data and fourth seismic data, wherein the data matching degree between the third seismic data and the fourth seismic data meets the matching degree requirement; based on the third seismic data and the fourth seismic data, solving a multi-dimensional space-time varying matching factor in stages; performing staged matching fusion on the third seismic data and the fourth seismic data based on a space-time variation matching factor to obtain a common midpoint gather; and performing post-processing based on the common midpoint gather to obtain a superposed image. The superposed image obtained by the embodiment of the invention has the advantages of different seismic data in different frequency bands, and through preprocessing, the difference of different seismic data in phase, frequency and energy is well eliminated, and the phenomena of poor event continuity and false fault in a middle-deep layer after fusion are avoided.
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Description

technical field

[0001] Embodiments of the present invention relate to the technical field of seismic exploration, in particular to a seismic imaging method, device, equipment and storage medium based on data fusion. Background technique

[0002] In recent years, with the promotion of offshore oil and gas exploration, the exploration target layer has gradually expanded to the lower strata. Improving seismic imaging in mid-deep and complex structural belts, and improving the signal-to-noise ratio and resolution of mid-deep seismic data have become an urgent need for seismic technology in oil and gas exploration and development at the present stage.

[0003] Conventional offshore streamer (flat cable) seismic acquisition data is affected by sea surface ghost reflections (ghost waves) and there are notches, which narrows the frequency band of seismic records and reduces the resolution of seismic data. The ghost wave frequency of the seismic acquisition data of inclined cables (...

Claims

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