The method of relative phase permeability determination in the laboratory conditions at the sequential pseudo-steady filtration

The proposed method allows reducing time of laboratory experiments for relative phase permeability determination. The result is a consequence of determination of pseudo-steady filtration. Pseudo-steady filtration means very weak alteration of filtration flows which make it possible to do reliable measurements of permeability and saturation of the porous medium.
Materials and methods
OST 39-235-89 “Oil. The method of phase permeability determination in the laboratory conditions at the joint steady-state filtration”.
Results
The proposed method provides for determination of the relative phase permeability of the rock samples with extremely low filtration properties within the reasonable time period.
Сonclusions
The proposed method has some features.
1. The method allows measuring relative phase permeability without steady-state flow with similar accuracy. It helps reducing much time for determining relative phase permeability of low-permeable rock samples. It also helps doing permeability surveys at low filtration speed.
2. The method allows measuring relative phase permeability for more wide saturation range.
3. The method results in a smooth function of relative phase permeability which strongly correlates with the experimental values.
4. Two parameters of the relative phase permeability functions are determined as a result. It allows receiving relative phase permeability function after two measures and additional measures improve its accuracy.