Abstract:

Flow unit model is the premise of reservoir numerical simulation.According to the reservoir properties,the model can be founded through five steps as following:①divide and determine cored-well flow units;②divide and determine the uncored-well flow units;③found reservoir architectural model;④found parameter model;⑤found flow unit models.According to the study made in Shuanghe Oilfield,Henan Province,four types of flow units as E,G,F,P were recognized,within which type E has perfect reservoir property and is distributed in distributary channels and river mouth bars;type P has the poorest property and is distributed in sheet sandbodies.It is proposed that formation factor is the main factor in determining the flow units,and could be used in dividing the flow units of uncored wells.

Key words: Shuanghe Oilfields, architecture, formation factor, flow unit