FOCUS-STACKING IMAGING METHOD AND SYSTEM BASED ON CORRELATION-BASED SEISMIC INTERFEROMETRY

The present invention discloses a focus-stacking imaging method and system based on correlation-based seismic interferometry. The method includes: loading an acquisition system to a seismic data set, picking up seismic first arrival traveltimes recorded by all shot gathers, and then performing refraction tomographic static correction, noise suppression, energy compensation, and deconvolution; processing the seismic data set after deconvolution by using an iterative residual static correction method and a high-accuracy velocity analysis method, to obtain a migration velocity model and a seismic data set after residual static correction; determining a common reflection point gather after muting and zero-offset gathers at different reflection points; calculating an amount of move-out correction for each common reflection point gather and a common reflection point gather after interferometric normal move-out correction; performing focus-stacking on the common reflection point gather after interferometric normal move-out correction, to obtain imaging results at different reflection points.