High-Frequency Dielectric Tool (HFDT™) Tool

High-resolution flushed zone bulk volume of water measurement

Our High-Frequency Dielectric Tool (HFDT™) technology measures the attenuation and phase of a 1-GHz microwave propagating near the borehole wall. This pad-type tool provides you with the bulk volume of water in the near-borehole region of the formation. The intrinsic vertical resolution of the log is approximately 1 in. It allows a more accurate evaluation of very thin-lamination sequences typically missed by standard triple-combo logs.

High-Frequency Dielectric Tool (HFDT) Tool

Uniquely suited for low-resistivity contrast pay

Dielectric logging provides the best insight in the reservoir when dealing with low-resistivity contrast pay. This could be due to the presence of fresh water, or under conditions of unknown or mixed water salinities (like steamflood recovery).

Value in combination

Integrated with total porosity, we derive flushed zone water saturation, Sxo. Unlike other Sxo measurements, the water saturation from dielectric measurement is not affected by water salinity, clay content, or rock textural parameters (m).

When combined with a shallow resistivity tool like the MSFL™ tool, the HFDT tool can provide a continuous cementation exponent “m.”

In combination with our MRIL® and GEM™ services, extremely accurate volumes of shale fluids can be calculated for unconventionals.


  • Measures water saturation in flushed zone (Sxo)
  • Measurement of irreducible water saturation in OBM (SWIRR)
  • Evaluation of thin beds
  • Gas indicator
  • Evaluation of cementation exponent ”m”
  • Dielectric porosity
  • Resistivity (Rxo) and dielectric constant of the flushed zone

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