Abstract:Discontinuous spatial sampling in image domain can make the migration amplitude of targets disturbing,non-unifrm sampling lead also that irrelevant energy cannot be removed enough,and usually called by migration noise.One of the aims of geometry design is to reduce the amplitude disturbance and migration noise.Here,for the geometry of 12L4S320Tapplied in WN Block in Tarim Basin,by comparing the different imaging results in different cases,we analyze quantitatively multifactor impacts on migration amplitude and migration noise such as target depth,target dip,receiving line number,line interval,point interval,survey types and so on.The following understandings are obtained:① With different position in box, seismic imaging result in each bin show large differences.② Amplitude attenuation and migration noise are more obvious in shallow or dip target.③ Wide-azimuth acquisition has imaging advantages only in complex structural area or anisotropic medium.④ Smaller shot line(shotpoint) intervals can improve the imaging quality more than receiving line(receiver point)intervals.⑤ Orthogonal,slant and brick pattern with the same acquisition parameters give the almost same imaging results.
李伟波, 李培明, 王薇, 王纳申. 观测系统对偏移振幅和偏移噪声的影响分析[J]. 石油地球物理勘探, 2013, 48(5): 682-687.
Li Weibo, Li Peiming, Wang Wei, Wang Nashen. Geometry impacts on migration amplitude and migration noise. OGP, 2013, 48(5): 682-687.