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Advanced Rock Properties

Clay-Bound Water Corrected Mercury Injection Capillary Pressure

Applying Clay-Bound Water Correction to Mercury Injection Capillary Pressure Test Results Improves Accuracy of Reserves Estimates


Before Clay-Bound Water Correction
Mercury Injection Capillary Pressure in shales and shaley sands will not match gas/water or oil/water capillary pressure data. Clays have been dried, giving access to mercury in pore space that should be taken up by clay-bound water. Non-wetting phase saturations are overly optimistic.

Clay-Bound Water Corrected Mercury Injection Capillary Pressure



Correction Requirements

  • Formation Water Salinity in grams/Liter
  • Qv1, CEC/pore volume

After Clay-Bound Water Correction
Corrected mercury injection capillary pressure data now match far better with actual gas/water or oil/water capillary pressure data and the porosity now reflects the clay-bound water and will result in more representative reserve estimations.


Clay-Bound Water Corrected Mercury Injection Capillary Pressure


1Hill, H.J., Shirley, O.J., Klein, G.E.: "Bound Water in Shaley Sands - Its Relation to Qv and Other Formation Properties," Log Analyst, May-June 1979.