1. A method of evaluating the transmission of a property within a subsurface geologic reservoir, comprising: a) providing a set of vertices representative of at least a portion of said reservoir; b) providing a plurality of edges, said edges representing property transmission paths between connected vertices within said set of vertices; c) associating with each edge a cost representative of the ability of said property to be transmitted across said edge from one vertex to another vertex within said set of vertices; d) selecting at least one source vertex from within said set of vertices; and e) determining an extremum path between said source vertex and each of at least two destination vertices that minimizes or maximizes a summed cost across the one or more edges included in said extremum path using a graph-theory single-source shortest-paths algorithm.