CHARACTERISTICS OF THE MULTIPLES IN THE EAST CHINA SEA AND ELIMINATION METHOD

Many types of multiples are observed in the seismic profiles from the East China Sea shelf area, which have brought up a lot of difficulties for geological interpretation. According to the different characteristics of multiples, three methods are proposed in this paper for multiple attenuation. The SWD approach is used to remove the short-period multiples of the sea bottom. The SRME technique is effective for suppressing the near-offset multiple of the strong wave impedance interface. The parabolic Radon transform can attenuate the long-period multiple of far-offset. In the processing of a large number of multi-channel seismic data of the East China Sea shelf, the optimal combination of the three techniques is recommended for better effect.