Borehole Geophysics

ICON Environmental Services Borehole Geophysics

Complete suite of borehole geophysical logging tools in a mobile vehicle. Rapid and highly accurate subsurface characterization. Removes “subjectivity” in wellsite geological descriptions. Allows through-casing surveying for lithology and location of well seal. Modifications for environmental applications include small diameter (1.8-inch diameter), use of short electrode spacing (6-inch) for high resolution, and full control of natural gamma parameters (time constant counting, differential correction, 8 to 12 feet per minute logging speed).

The character of our small business evolved from a blend of the expertise brought into it by the founding principals. Furthermore, the company’s growth has been based on active participation from all its employees. Thus, ideas from creative and innovative thinking individuals are used to develop cost-effective and practical solutions. Utilizing this total staff approach enables ICON to efficiently handle a variety of projects.

Natural Gamma – Calibrated to an API standard or to ICON’s span to match Unified Soils Classification System; used to identify and correlate clay-rich zones in open boreholes or through wells;
can be used to locate the bentonite seal in wells.

  • 16 and 64-inch – Normal Resistivity – Used to locate water-bearing zones in open boreholes and can be used to locate salt water impacted groundwater and to calculate salinity; used for lithological correlation.

  • Lateral Resistivity

  • Single-Point Resistance- Provides relative resistance readings in open boreholes, and usually produces characteristic signatures that aid in cross-site correlation.

  • Caliper- Guages borehole diameter to aid in proper well construction, and in open boreholes can indicate more-cohesive clayey laminations within loose silt sediments.

  • Induction Conductivity – Used for surveying lithology and brine impact through PVC wells.

  • Spontaneous Potential (SP) – Defines bed boundaries in open boreholes.