Naturally fractured reservoirs, NFR are distinguished fromthe conventional reservoirs by the discontinuities in porousmedia. Prediction of non-Newtonian fluid flow behaviour inNFR is a challenging work in petroleum engineering. Largequantities of hydrocarbons are present in NFR in differentregions of the world. The discontinuities in porous mediahave complicated the description of the petrophysicalstructures and the fluid flow in fractured porous andpermeable media. This study uses discrete fracture network,DFN to explicitly model the flow of fluids through thefractures. In this study, hydrocarbons are treated as non-Newtonian which is the case with waxy or heavy crude oils.Multiphase fluid flow models in porous media arefrequently used in many important applications of EarthSciences, such as in ground water contamination,subsurface remediation and reservoir modeling, Diaz-Veraet al. (2008). The same is true forsingle-phase flow in porous media. This simulation iscarried out using Carreau viscosity model and power lawmodel to describe the relationship between viscosity andshear rate. The simulation is implemented with finiteelement analysis software, the COMSOL Multiphysics. Theresults obtained are compared with reference results ofNewtonian flow. The influence of viscosity function on theshear rate is weaker in power-law than in Carreau model.Some other characteristic results along with appropriateanalysis are presented.
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