摘要
Taking land 3D seismic data in Block Amal in Oman as an example,this paper mainly describes some methods for multiples recognition such as autocorrelations of CMP gather,velocity spectrum,stack section and time slices to study multiple characteristics.Based on the above discussion,the authors choose the beam-forming filtering to attenuate multiples in the pre-stack processing.In this way the quality of velocity spectrum is improved,and the velocity of primary reflection is obtained.In the post-stack stage,the local multi-traces coherent filtering method is used to attenuate remnant multiples.Application results of 3D seismic data in Block Amal in Oman prove the efficiency of the approach.