Multi-component combined shear wave noise attenuation technology of OBN data and its application in a region of Yinggehai basin
In OBN seismic data processing,Z component shear wave noise suppression is always the critical link of p-wave processing.The quality of shear wave noise suppression directly affects the data quality of Z component and plays a crucial role in the dual-sensor summation(P and Z Summation).Shear wave noise has the characteristics of strong amplitude,coherence,low frequency,and low speed and is conical in 3D space.According to the characteristics of shear wave noise,a combined shear wave noise attenuation technique using multi-component data from OBN data is proposed in this paper.First,the shear wave signal recorded in XY component was matched with the Z-component to obtain the shear wave noise model of Z component,and the 3D curvelet forward transformation is carried out on the data and noise model on the cross-spread receiver gathered.The minimal flat method is introduced to match and subtract the effective signal and shear wave noise,and finally,the 3D curvelet inverse transformation was carried out to suppress the noise.Applying this method to the actual data of a block in Yinggehai Basin can effectively suppress z-component shear wave noise and provide high-quality seismic data for subsequent processing.
国家科技期刊平台
NSTL
万方数据
维普
