Full-waveform inversion method based on seismic record integral
A full-waveform inversion and seismic recording technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of inversion falling into local extremum, lack of low-frequency seismic data, inversion failure, etc. , high reliability, simple calculation effect
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[0093] In the following, the present invention will be explained and illustrated through theoretical model tests in conjunction with specific implementation methods.
[0094] In order to further illustrate the realization idea and process of this method and prove the effectiveness of the method, the marmousi2 model is used to test and compare with the results of conventional full waveform inversion.
[0095] S1: Use the marmousi2 model as the true velocity model. The true speed model has a width of 3048m and a depth of 9216m. A square grid is used for discretization, and the grid size is 24m.
[0096] S2: Observation system: 48 shot points and 383 receiver points are evenly distributed on the surface. The sampling time of seismic records is 4.4s, and the sampling interval is 2ms.
[0097] S3: by the real speed model (see figure 2 ) and the Reich wavelet with a source function of 10 Hz, through the regular grid acoustic wave equation of the 2nd order in time and 12th order...
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