Title: A New Method for the Calculation of Two-phase Relative Permeability in Ultra-low Permeability Reservoir
Abstract: Relative permeability function is important for reservoir numerical simulation. In ultra-low permeability reservoir,the pores and throats are very small and the pore structure is very complex,leading to obvious capillary pressure effect and end effect in the process of water flooding experiment. The traditional JBN method( ignoring the capillary pressure) is not applicable to calculate the relative permeability of ultra-low permeability reservoir. In order to overcome the core end effect,X-ray CT technique was applied to obtain water saturation profile data. A new method for calculating the two-phase relative permeability was proposed. Results show that the relative permeability curves calculated by the proposed method can reflect the features of ultra-low permeability reservoir, the permeability of water phase rises slowly at first and then increases rapidly,while the permeability of oil phase declines rapidly. The research is of great benefit to the calculation of two-phase relative permeability in ultra-low permeability reservoir.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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