Borehole Surveys - Hayles Geoscience Surveys Ltd. Manitoba, Canada Geophysics

Borehole Surveys

HGS provides specialized geophysical surveys to economic mineral exploration and environmental characterization. Borehole surveys are used to measure the physical properties of the materials in and surrounding a borehole. The borehole surveys offered are:


Borehole Technique		Use


Fluid temperature & conductivity		Water supply characterization, fracture location, total dissolved solids estimation
Impeller & heat-pulse flow meters		Water flow rate and direction along the borehole
Acoustic velocity		Mechanical properties, fracture location, rock type estimation, cement bond monitor
Electrical resistivity/IP		Electrical properties and structures, fracture locations, economic mineral locations
Cross-hole seismic & cross-hole radar		Hole-to-hole inspection and detail correlations, local detail structures
Magnetic susceptibility & field strength		Magnetic properties of materials intersected by borehole, geologic characterizations
Inductive electrical conductivity		Mining exploration, waste site characterization
Time Domain EM		Economic mineral exploration
VLF-EM E & H fields		Reconnaissance exploration, mining, water resources
TV and acoustic TV		Borehole wall inspection, fracture location and oreintation
Gamma-gamma density		Bulk material density surrounding the borehole
Neutron-neutron porosity		Rock lithology, water/hydrocarbon content, porosity
Natural gamma		Natural radioelement concentration of materials in borehole wall
Gyroscopic		Variation of azimuth and dip of borehole with depth along borehole

Borehole Survey Procedure

Manitoba Canada Geophysics Figure 1. A borehole survey in progress.

Figure 1. A borehole survey in progress.

Manitoba Canada Geophysics Figure 2. Borehole log.

Figure 2. Borehole log.

Manitoba Canada Geophysics Figure 3. VLF-EM survey reconnaissance.

Figure 3. VLF-EM survey reconnaissance.

Manitoba Canada Geophysics Figure 4. Seismic velocity from same borehole as in Figure 3.

Figure 4. Seismic velocity data from the same borehole as in Figure 3.

Manitoba Canada Geophysics Figure 5. Correlation of natural gamma and electrical conductivity responses between two adjacent boreholes drilled in the overburden. These are shallow boreholes. The phase response is proportional to the magnetic susceptibility.

Figure 5. Correlation of natural gamma and electrical conductivity responses between two adjacent boreholes drilled in the overburden. These are shallow boreholes. The phase response is proportional to the magnetic susceptibility.