Vertical Seismic Profiles

VSP 

A seismic survey geometry where the receivers are typically placed inside a borehole with the source points being located on the surface, or in a separate borehole.

Zero-Offset VSP 

A VSP where the source is located as close to the wellbore as possible

Offset VSP

A VSP where the source is located as an offset to the wellbore.

Walk-away VSP 

A VSP where multiple sources are located at different offsets along a line passing over the wellbore.

Cross-well VSP 

A VSP survey where the source points are located in one borehole and the receiver points are located in a second borehole.

Reverse/Inverse VSP 

A VSP where the sources are located in the borehole and the receivers are on the surface

Deviated Borehole VSP 

A VSP where the receivers are placed in a non-vertical borehole.

Radial VSP 

A 3D version of the offset VSP where all sources are placed at a certain offset in a circle around the borehole.

Spoke VSP 

A 3D version of the walkaway VSP where sources are placed on multiple lines leading out from the borehole.

Grid VSP

An extension of a standard orthogonal 3D where the sources are placed in parallel lines in a grid above the borehole.