METHOD OF SURFACE SEISMIC IMAGING USING BOTH REFLECTED AND TRANSMITTED WAVES

摘要

Reflected-transmitted non-converted and converted seismic waves as used f or seismic imaging which is not limited by the angle of inclination of the s eismic interfaces. These wave signals are recorded at the surface and are la ter used to obtain seismic imaging of geological discontinuities and the phy sical properties of the medium. Known duplex waves are used with transmitted waves for obtaining seismic images from much wider angles, ranging from hor izontal to vertical. Two types of migration procedures are used: the first o ne being based on migration of transmitted compressional and converted duple x waves, and the second one being based on the joint migration of two interr elated fields, such as interferometric principles; for example, the first fi eld of primary waves corresponding to the one time reflected monotypic compr essional (non-converted) type of waves and a second wavefield corresponding to secondary waves of more complex origin, such as reflected waves and conve rted waves.