Method and device for establishing low wave number initial model of depth domain seismic inversion and medium

Abstract

The present application relates to a kind of low wave number initial model establishment method, device and medium of depth domain seismic inversion, method includes: extracting the well logging data of target layer section, the logging attribute of the low wave number initial model to be built is calculated;According to well seismic calibration result, extract well seismic data of well logging section, and according to logging depth sampling interval is up-sampled, obtain well seismic data on well logging depth section;The amplitude attribute of well seismic data section is calculated;With the amplitude attribute of well seismic data section as independent variable, the logging attribute of the low wave number initial model to be built is function value, linear fitting is carried out;From the fitting result, the amplitude attribute of optimal linear correlation is selected, and the optimal slope parameter and optimal intercept parameter are obtained;The minimum amplitude attribute of corresponding depth domain seismic data body is calculated;Depth domain seismic data body amplitude attribute is converted into the attribute of low wave number initial model to be built;Low wave number initial model attribute to be built is carried out Gaussian filtering, and the final low wave number initial model is obtained.

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