Random  simulation modeling and determinate simulation modeling were used in the paper for Su 6 well region and the whole field. In accordance with the major problem with the strong heterogeneity of Lower Paleozoic carbonate reservoir in Sulige gas field，the geological research and gas reservoir description results in Sulige  gas field were quantitatively transformed by taking random simulation modeling as the major method，therefore a set of geological models，including structural  model，petrophysical model and fluid distribution mode1 of Sulige gas field were set up. Based on these models，the risk assessment of reserves may be carried  out；the relation between gas well productivity and geological condition can be summarized；the bases of optimizing well sites may be determined ;and the grid  parameter fields can be provided for gas reservoir numerical simulation.