Abstract：The coherent noise is main obstacle for improving S/N ratio,correctly conducting the velocity analysis and migration in 3D seismic exploration of complex areas.The current-used coherent-noise-eliminated method is also not satisfactory,for that reason,the paper tried to use 3D beamforming fil-tering method to eliminate the coherent noise in 3D seismic data.Considering the complicated 3D geometry,we use two key steps in design of 3D beamforming filtering method:① partitioning the seismic data according to azimuth angle and simplifying the 3D time-distance relationship to 2D time-distance relationship made the high cost and instability be avoided;② introducing dynamic balance bin to avoid the insufficiency of seismic channels in some azimuth-partitioned areas,so that guaranteed the stability and high-resolution of results.The processing results of synthetic and practical data showed that the 3D beamforming filtering method presented by the paper can effectively eliminate a variety of coherent noise.
洪菲, 胡天跃, 王润秋. 利用三维聚束滤波方法消除相关噪声[J]. 石油地球物理勘探, 2005, 40(1): 42-47.
Hong Fei, Hu Tian-yue, Wang Run-qiu. Using 3D beamforniing filtering method to eliminate coherent noise. OGP, 2005, 40(1): 42-47.
