Abstract:By using the CDP gather, common-mid-point stacked time section or apparent depth section can directly be obtained, which can be converted into normal depth section。A subsurface interface may have different appearances on different seismic sections。This paper discusses the appearance of dipping plane interface and the formula of 3D migration for normal depth section and 3D migration in two steps。Whether the two-step 3D envelope migration, two-step difraction migration or two-step 3D migration of CMP stacked apparent depth section, the first step is always the migration along the Iine, and the second step is switching over the lines, with the switching angles being determined by the angle between the normal plane and perpendicular plane。The first step of the migration is performed within the perpendicular plane, and the second step of migration is the spatial migration of the side waves.
引用本文:
楼锡吉. 倾斜平界面在地震剖面上的表现形态[J]. 石油地球物理勘探, 1984, 19(5): 405-413,422.
Lou Xiji. The appearance of dipping plane interface on seismic sections. OGP, 1984, 19(5): 405-413,422.