Acquisition method, device and equipment of near-surface seismic attenuation factor and medium

Abstract

The embodiment of the invention relates to a near-surface seismic attenuation factor acquisition method and device, equipment and a medium. The near-surface seismic attenuation factor acquisition method comprises the steps that according to a near-surface layering result of field surface survey, speed layers where all excitation points in an excitation well and all receiving points arranged at equal intervals in a receiving well are located are determined; extracting a first channel of seismic data corresponding to each receiving point in the corresponding velocity layer and a second channel of seismic data corresponding to any other velocity layer from the multiple channels of seismic data corresponding to each excitation point in the corresponding velocity layer; according to the first channel of seismic data and the second channel of seismic data corresponding to each receiving point, determining an initial seismic attenuation factor corresponding to each receiving point based on a spectral ratio method, and further calculating a final seismic attenuation factor; according to the final seismic attenuation factor and the receiving point depth corresponding to each receiving point in each speed layer, a change curve of the near-surface seismic attenuation factor is determined, and a more accurate Q value can be obtained.

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