Vertical seismic profile

Walkaway VSPs (C) feature a source that is moved to progressively farther offset and receivers held in a fixed location.

Salt-proximity VSPs (E) are reflection surveys to help define a salt-sediment interface near a wellbore by using a source on top of a salt dome away from the drilling rig.

[3] The advancement in technology for well monitoring has made VSPs more accurate and more precise with the use of very long baseline interferometry (VLBI).

[3] VLBI is an astronomical radio antenna technique that allows for high resolution imaging on a spatial scale.

[3] The long vertical length required to create a borehole for a VSP allows for the equipment of a VLBI to analyze data within a larger region.