Ray chromatography imaging method for refracted waves
A technology of ray tomography and imaging method, applied in the field of imaging, to achieve the effect of simple imaging steps, good imaging effect and high utilization value
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[0022] The present invention will be further explained below.
[0023] The refracted wave ray tomography method is characterized in that it comprises the following steps:
[0024] (1) Data acquisition-pick up seismic travel time t m
[0025] Pick up the seismic travel time t recorded by each source-geophone m This step takes more time because the interpretation of pre-stack seismic data is essentially involved when picking up travel. Manual picking is slow and the data quality is good. Although the travel speed of automatic picking is fast, errors are prone to occur and affect the tomographic results, so manual correction is required.
[0026] (2) Establish a speed model
[0027] After the velocity model is established, forward calculation of the model is performed, and ray tracing technology is generally used to calculate the ray path and travel time t c .
[0028] (3) Establish a linear equation for inversion during travel
[0029] The linear equation is as follows:
[0030] Considering...
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