Fracture-size-correlated aperture mapping for localized porosity and permeability determination

摘要

A geomodeling method embodiment includes: (a) obtaining a model of a subsurface region having a reservoir, the model including a discrete fracture network; (b) determining an aperture map for each fracture in the discrete fracture network, each aperture map having aperture values based at least in part on a lateral dimension of the fracture; (c) for each of a plurality of cells in the model: (cl) identifying a portion of the discrete fracture network contained within the given cell; (c2) deriving a fracture permeability from aperture maps for the identified portion; and (c3) calculating a fracture porosity from aperture maps for the identified portion; and (d) displaying the fracture porosity and fracture permeability as a function of position throughout the subsurface region.