Bay uses a wide range of borehole geophysical methods depending on the application. These methods provide in-situ measurements of physical properties of the subsurface layers. These include:
Borehole logging for environmental and hydrogeologic investigations (Natural Gamma, Single Point Resistivity, Self Potential, Conductivity)
PS suspension logging for measuring downhole P- and S- wave velocities for engineering applications.
Vertical Seismic Profiles for subsurface stratigraphy correlation and mapping for exploration and engineering applications.
Check shot surveys for subsurface stratigraphy correlation for exploration applications
MASW
Multichannel Analysis of Surface Waves (MASW) is a relatively new in-situ seismic method for determining shear wave velocity profiles building on the Spectral Analysis of Surface Waves (SASW) method. Testing is performed on the ground surface, allowing for non-invasive and less costly measurements than borehole techniques. MASW is used for engineering applications that include the following:
Infrastructure evaluation
Shear strength composition of soils
Wind turbine site characterization
Slope and retaining wall stability
Geo hazard investigational
Gravity
The gravity method is used to map lateral variations in rock densities resulting from different rock types and structural features. Gravity is used in local and regional exploration applications.
Magnetics
The magnetic method measures the intensity of a component or the total of the earth’s magnetic field, and the horizontal or vertical gradient of the earth’s magnetic field. Magnetics is used in engineering and environmental applications that include the following:
Locate buried utilities and tanks
Locate buried metallic debris
Detect buried ordnance
Delineate waste site and landfill boundaries
Map basement faults and geology
Copyrights 2009 Bay Geophysical, Inc. All Rights Reserved
