Application And Method Study Of Pre-stack One-wave Equation Depth Migration Based On Irregular Topography

When surface conditions are complicated,tradition migration methods cannot meet the standard of precise imaging.Pre-stack one-wave equation depth migration based on irregular topography is a valid way to solve the problem of irregular topography and complex geologic structures.The thesis firstly introduces the image method study in irregular topography area,mainly talk about the method of wave field downward continuation.Then it studies the one-wave equation pre-stack depth migration algorithms,including the SSF algorithms,FFD algorithms,XWFD algorithms and XWFD with error compensation.In conclusion,we summarize the XWFD pre-stack migration with error compensation method to improve the migration quality of irregular topography.We test the new method in theoretical model.Comparing to FFD and SSF depth migration method based on irregular topography,XWFD pre-stack migration with error compensation method has advantage in migration quality.Then use the new method in Mc1 j area.The imaging quality of complex structures is effectively improved.