Abstract: Steam flooding significantly improves the heavy oil reservoirs recovery, however, it is also a costy system engineering. Before carring out steam flooding to develop reservoir, sorting steam flooding applicability can increase the success and economic benefit, and can effectively avoid investment risk. Based on the reviewed steam flooding sorting criteria, ten reservoir parameters have been selected as evaluation index which can be quantified by the according membership function, the simple fuzzy comprehensive evaluation model of steam flooding sorting has been built with introduction of weight fuzzy evaluation computational model. The case history shows the feasibility and comprehensiveness of this method. The model overcomes the shortcoming of the single element limitation evaluation of sorting criteria and can be widely used in the steam flooding sorting of heavy oil reservoir.

Key words: steam flooding, fuzzy comprehensive evaluation, sorting, weighing, degree of membership