Coupling flow model of shale gas considering multiscale fracture
Shale reservoirs have complex nanopore structures and multiscale cracks Based on viscous flow,Knudsen diffusion,real gas effect in shale,multiple interaction continua(MINC)model and embedded discrete fracture model(EDFM)were coupled when considering the influence of transient flow between the matrix and cracks in shale.Finite volume method and finite difference method were used to implicitly solute the partial differential equations.The results show the effect of adsorption gas on shale gas production is obvious.Therefore,the existence of adsorbed gas cannot be neglected during the simulation of shale gas;The change of natural fracture opening has obvious effect on shale gas production;In the process of hydraulic fracturing,the volume of hydraulic fracturing zone is the main factor of affecting shale gas production and natural fractures.
Shale gasFractureTransient flowMINCEmbeded discrete fracture model
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