Porosity & Permeability Characterization

Our Porosity & permeability analysis product is based on the unique advantages of the Nuclear Magnetic Resonance (NMR) technique. Using permanent magnetic fields and electromagnetic energy of specific frequency, the hydrogen nuclei of the formation fluids are excited. Their response provides a lithology-independent measurement of the total porosity and the pore size distribution of the rock or sediment. Total porosity is then split into its fractional components by applying cutoffs within the pore size distribution. This allows us to get the specific retention and specific yield. Furthermore, a model based on mathematical and physical relations between porosity and permeability is applied to calculate formation permeability and estimates of the hydraulic conductivity. The final result is a set of continuous logs (total porosity; specific yield; specific retention; permeability; hydraulic conductivity) with a vertical resolution of around 8 centimeters, delivering a strong statistical dataset of roughly 1250 individual in-situ measurements per 100m. Essential for all industries to evaluate subsurface porosity and permeability (rock or sediment). Not applicable to environments where porosity and/or permeability is controlled by natural fractures.

Acquiring Critical Subsurface Parameters

  • Total Porosity
  • Specific Yield
  • Specific Retention
  • Moisture Content
  • Permeability
  • Hydraulic Conductivity and Transmissivity

Borehole Magnetic Resonance

Nuclear Magnetic Resonance (NMR) is a unique technique 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. Although NMR technologies have 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. Through our partnership with QTEQ we are able to provide a fit-for-purpose Borehole Magnetic Resonance technology (BMR), designed specifically for the lithium-brine, groundwater, mining and coal seam gas markets.
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