Surface layer static correction method and device for complex surface area

The invention provides a surface static correction method and device for a complex surface area, and the method comprises the steps: determining first arrival data according to original seismic data; determining a high-speed layer top boundary according to the first arrival data; determining a replacement speed according to the top boundary of the high-speed layer; determining a dominant parameter static correction value area according to the top boundary of the high-speed layer and the replacement speed; obtaining dominant high-speed top surface parameters according to a dominant parameter static correction value region, and determining a whole-region unified low-frequency component in combination with a replacement speed; determining a fitting high-frequency component according to the dominant parameter static correction value area; and reconstructing the unified low-frequency component and the fitting high-frequency component of the whole area in a shot point domain and a detection point domain respectivel