Advanced Rock Properties
Basic Rock Properties
Routine Rock Properties for Tight Gas Sands
Porosity and Permeability
- Porosity tells what pore space is available for fluids
- Permeability measures the capacity of the rock to transmit fluids and gas
Pulse Decay Permeability
- Accurate, direct measurement to 10 nanodarcy under reservoir net confining stress conditions
- Permits effective Kg to be measured at residual fluid without moving fluid in the pore system
- Keg at various water saturations
Adsorbed Water Index Qv
- Qv is important for resistivity log interpretation and capillary pressure interpretation in the assessment of water
saturation and effective porosity
- Bush and Jenkins Adsorbed Water Index Technique (AWI) uses a correlation of sample weights using humidity drying
and convection drying to find the Qv (Cation Exchange Capacity per unit pore volume)
- Qv correlates to the clay bound water porosity
- Technique investigates the entire pore system
