Determination of dependence parameters of relative phase permeabilities using well testing and numerical modeling for a low-permeability terrigenous reservoir

Background. When using geological hydrodynamic models for analysis and engineering, phase permeabilities are of key importance in field development. Traditional approach to determining these parameters through laboratory core tests often does not display sufficient accuracy, so an alternative technique for determining phase permeabilities is proposed. Objective. This study is intended to clarify the phase permeability relationships in the forecast calculations of field production and assessment of the success of geological and technical measures (bringing-in of infill wells, repeated hydraulic fracturing) without using irrelevant data from core studies. Results. A technique was formulated for obtaining relative phase permeabilities from field development data, deciphering the results of hydrodynamic testing of the corresponding wells and forming a numerical model for the development object. This technique was tested on a real development object (the southern part of the Priobskoye field). Conclusions. The technique can be used to model oil fields. In comparison with the classical approach of determining relative phase permeabilities by core, this method allows us to get rid of the scaling effect and get relevant dependencies for the entire development object.