Abstract：It is commonly required that receivers and sources are in a same horizontal level on migration imaging,but topographic relief usually appears in real survey. The effect of relief on data can be eliminated by ordinary statics when lateral velocity variation Is not severe;otherwise,there are bigger errors by using ordinary statics for removing effect of relief when lateral velocity variation is severe. Based on wave equation,the paper adopted hybrid method for wave field continuation in conducting datuming. Elementary principle of wave equation datuming has been illustrated. General formula of wave continuation for hybrid method has been given and calculation for common shot records and zero-offset records has been conducted in the paper. Numeric calculation results show that the method is effi- ciency and accuracy and can be used for real data processing.
