Abstract:

According to the characteristics of reservoir and the flowing through porous media,the fracture and vug dual-media models are grouped into three types,and they can be simpified into two types mathmatically,i.e.,fracture-matrix and fracture-pore.The conventional Woren-Roof dual-media model is used in the former,and in the latter,the channeling formula of fracture-vug system must be established to perform numerical simulation calculation.According to the characteristics of fracture-vug association and the pressure distridution in fractures,the channelling calculation formula for freacture-vug media is derived,and commercial software ECLIPSE is taken as example,the equivalent simulation of fracture-vug dual-media model is realized by adjusting the specified key words.Based on the result,the characteristic of flowing through porous media of fracture-vug dualmedia are studied and analyzed,when the channelling coefficient is low,the log-log well test curve of single phase occures concave shape,and when the coefficient is large enough,the curve shape of single phase is similar to that of single media,no concave shape is shown,but the two-phase flow of oil and water can make water cut terrace-like shape.

Key words: fracture, dissolved pore, dual-media, channelling, ECLIPSE