Abstract:A sphere reflector can display different shapes on different kind of seismic sections,The upper semisphere and low semisphere show same hyperbolas on a normal depth section,the hyperbolic apex of the upper semisphere being above that of the low semisphere, A new 3-D migration method is put forward, According to this method, the 3一D migation of seismic data is accomplished by first migrating data in the line direction,then rotating them around the line.As for a sphere reflector on a normal time section, the normal two一way travel time to versus y is not a hyperbola.In so fan as a known line,if x is a constant,tD is minimum when Q,and to trends toward maximum when y approachs士0.As for a sphere reflector on stacked depth section, the apparent depth versus y is a quadruplicate curve, The migration of stacked depth section need not use velocities in migration and time一depth conversi-an.The spatial shape of sphere reflector can be directly determined using this kind of seismic section.
收稿日期: 1984-12-14
引用本文:
楼锡吉. 球界面在地震剖面上的表现形态[J]. 石油地球物理勘探, 1985, 20(6): 571-580.
Lou Xiji. The shapes of a sphere reflector on seismic sections. OGP, 1985, 20(6): 571-580.