The simulation and analysis of wave equation shows that the multiple waves couple with and the effective reflection wave under the condition of shallow water,the multiple waves reflected back from sea surface change the waveform and phase of the effective reflection wave and decrease the frequency of seismic data.

In consideration of the problems of static correction, improvement of signal-noise ratio and suppression of multiple waves, effective processing schemes are presented.

Io consieeration of the characters of multiple waves in Kongquehe area.

A method to delete multiple reflections with high fidelity and its application in offshore seismic data processing;

There are several factors that affect seismic data quality in the past years, such as multiple reflections, shielding of the .

In contrast,methods used to depress regular interference,especially multiple reflection and surface wave are few.

Recently, the method of inverse scattering series has already been used to remove free surface multiples and to attenuate internal multiples, which is significant to seismic data processing.

The paper introduces the basic concept of beamforming method in multiples and internal multiples attenuation.

In seismic data processing,free surface multiples attenuation is important in multiples attenuation.