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.
- 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
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.