A detail analysis of existing geological modeling technologies is made and correlations between parameters in simulation of lithological-petrophysical, hydrodynamic and geophysical fluid systems are revealed. Optimal character and feasibility of basic modeling units – the hydraulic unit of the flow and the complex parameter – are noted. Causes of collectors heterogeneity are specified. The influence of shaliness, the type of the shale and the grain-size structure on the complex parameter is specified.