Multi-wave Suppression Method Research in the Northern Edge of Shenhu Uplift in Wenchang Sag
Multi-wave is extremely developed in the seismic data of the northern edge of Shenhu uplift resulting in inaccurate velocity picking,low seismic imaging accuracy,and difficult to implement low-amplitude traps.In order to solve the problem of difficult multi-wave suppression in this area,according to the periodic,time difference and geospatial statistical characteristics different from the reflected waves,this study carried out joint attenuation of multi-wave in the shot set domain,common offset domain and CMP track set.Finally,the multi-wave modeling was determined to use SDM,SWD and generalized 3D SRME.Then,the multi-model three-dimensional adaptive matching reduction method was used to suppress the multi-wave model.Finally,the residual multi-wave suppression was combined with high-precision Radon multi-wave suppression technology.Through the application of the above technologies,the multi-wave in the target area was effectively suppressed,providing high-quality basic data for velocity modeling and prestack depth migration imaging.At the same time,the seismic data of accurate imaging for the low-amplitude trap exploration in this area was provided,and the technical reference for multi-wave suppression in other areas was also provided.Keywords:Shenhu uplift,multi-wave,three-dimensional adaptive matching reduction,low-amplitude trap.
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