Borehole Geophysical Methods

Geophysical methods are applied both from the ground surface and within boreholes. This section discusses most of the commonly used borehole techniques. These techniques provide detailed properties of the subsurface materials local to a borehole. Although the results of borehole surveys are often directly useful, they can sometimes be used to constrain the interpretation of surface geophysical methods.

General Crosshole Procedures

General In-Hole Procedures

Logging Techniques and Tools


• Acoustic Logging
• Acoustic-Velocity Logs
• Acoustic Waveform Logging
• Cement-Bond Logging
• Acoustic Televiewer


• Electrical Methods
• Spontaneous Potential Log
• Single-Point Resistance Log
• Normal Resistivity Log
• Lateral Resistivity Log
• Focused Resistivity Log
• Microresistivity Log
• Dipmeter Log
• Induction Logging


• Flow Logging
• Impeller Flowmeter
• Heat-Pulse Flowmeters


• Hole-To-Hole Logging
• Crosshole Seismic-Sonic Logging Survey
• Crosshole Seismic-Sonic Tomography Survey


• Hydrophysical Logging


• Nuclear Logging
• Gamma logging
• Gamma-Gamma Logging
• Neutron Logging


• Well Completion Logging
• Casing Logging
• Logging Annular Materials
• Borehole-Deviation

Surface to Borehole Procedures


• Overview of Borehole Seismic Methods


• Velocity Surveys


• Vertical Incidence VSP

 

The pages found under Surface Methods and Borehole Methods are substantially based on a report produced by the United States Department of Transportation:

Wightman, W. E., Jalinoos, F., Sirles, P., and Hanna, K. (2003). "Application of Geophysical Methods to Highway Related Problems." Federal Highway Administration, Central Federal Lands Highway Division, Lakewood, CO, Publication No. FHWA-IF-04-021, September 2003. http://www.cflhd.gov/resources/agm/