Abstract: In the construction of reservoir models of fluvial deposits, the channel shape is always the most important aspect and a criteria for the evaluation of the efficience of the modeling methods. The Simpat，which belongs to the newly developed multiple-point geostatistics method, is introduced and its shortcomings of reproduction of discontinuity channel is analyzed. The stochastic selection of data patterns results in this continuity. A constrained method for the selection of data patterns is proposed and integrated into Simpat. The reservoir model of Ming 3-5-1 is constructed by using the improved Simpat and non-improved Simpat in the NO.6 block in No.2,Dagang Oilfield respectively. The result shows that the improved Simpat reveals the channel shape and its distribution better than the non-improved Simpat does.

Key words: multiple-point geostatistics, Simpat, improvement, fluvial facies reservoir, Dagang Oilfield