Borehole Magnetic Resonance (BMR)


Understanding fluid storage and flow potential in subsurface formations is central to evaluating many different georesource types.

Borehole Magnetic Resonance (BMR) is a unique technology that is sensitive to both the fluid volumes present in a rock, and the geometry of the pores containing these fluids, providing information on both storage and flow potential.

Not only does BMR provide fluid volume and porosity, independent of any lithology effects, it can also differentiate the volume fraction of mobile fluid that can be produced from the fluid volume fraction that is bound in place in the rock.

Where more than one fluid type is present – such as in oil and gas or coal seam gas applications – BMR also allows the different fluid types to be identified and for volume fractions to be quantified.

The pore geometry information obtained directly from BMR measurements also allows permeability and hydraulic conductivity to be derived, providing an understanding of how effectively the fluids will produce.

Although BMR technology has been routinely used in the oil and gas industry since the early 1990s, tools developed for this application have typically been too large, too complex and, thus, too costly for use in other georesource sectors.

Qteq has developed fit-for-purpose BMR tools that meet both the environmental and commercial requirements of the groundwater, mining, and coal seam gas markets, while still being suitable for use in oil & gas applications.

The QL40 BMR tool family is compatible with the ALT/Mount Sopris Instruments Quick Link (QL) product line and can be combined with other QL40 tools as part of a larger tool string, or they can be run as standalone logging tools.

The tools run on standard 4-core cable and use the ALT Logger or the newer OPAL acquisition systems. Two tool types are currently available:

  • QL40-BMR-60, which has a 60 mm OD and is suitable for use in holes up to 230 mm in diameter
  • QL40-BMR-90, which has a 90 mm OD and is suitable for use in holes up to 310 mm in diameter.

Qteq’s BMR logging technology can be accessed through our wireline partners in the following areas:

  • Digital Surveying in South Africa and Botswana, and other African countries on demand []
  • Zelandez in Argentina and Bolivia, and other South American countries on demand. []

For information about renting our tools directly, contact:



  • Moisture content in vadose zone
  • Specific yield and specific retention
  • Hydraulic conductivity and transmissivity
  • Moisture retention curves.

Hard rock mining:

  • Moisture content
  • Specific yield and specific retention
  • Dry bulk density and matrix density.

Solution mining:

  • Moisture content
  • Specific yield and specific retention
  • Hydraulic conductivity and transmissivity.

Oil & Gas:

  • Lithology-independent total porosity
  • Clay-bound, capillary-bound and free-fluid volumes
  • Permeability
  • Fluid typing and saturation
  • Capillary pressure curves.

Coal mining and coal seam gas:

  • Adsorbed gas, free gas, and water volumes.

For more information please call us on +61 (0)7 3834 9100.

“To lead change in georesources industries through technical and commercial innovations that protect the environment and enhance our clients’ social licence to operate.”