Abstract:Differential of seismic trace functions as filtering of a filter whose characteristic frequency is icu. Its amplitude property is directly proportional to the circular frequency cu,and can be used to compensate the fast attenuation of high frequency seismic waves in medium. So the amplitude recovery method makes the processed seismic energies in each layer remain nearly the same as before.Part 3D seismic data from FHD reservoir in Dagang oil field were processed by using this method;as a result, the reflection horizons under the Tertiary system were greatly improved in resolution,bringing satisfactory result.