Joint 3D inversion of SWD and surface seismic data

The data obtained from well logs and surface seismic profiles have opposite but complementary characteristics. The first are very precise in depth, but they measure only the local physical properties; the second have a lower resolution, but sample a much larger rock volume. A Vertical Seismic Profile (VSP) is the natural bridge between the two data types: its resolving power is intermediate, and it is recorded in time at well-known depths. Thus, it can directly check the conversion between the time domain of surface profiles and the depth domain of well logs.