关键词: 乐安油田, 测井解释模型, 孔隙度, 渗透率, 含油饱和度, 稠油

Abstract: The target sections Es₄ are located in the marginal area of the basin and with a shallow buried depth （about 1000m）.The logging interpretation of heavyoil reservoir is very difficult because of the loose reservoir，heavy oil，complex rock texture，strong heterogeneity and clear differences between layers.Based on the core analysis，well test，production test and the oilfield production performance，the "four properties"（i.e.，lithology，physical property，electric property and hydrocarbon bearing）relationships among pebbly sandstone，coarse sandstone，fine sandstone，siltstone，conglomeratic argillaceous sandstone and pelitic siltstone formation are studied，the logging interpretation models of porosity，permeability and oil saturation for each sand group is set up.By using the interpretation models，51 wells in this area are reinterpreted，the result shows that the interpretation models based on different sand group have higher accuracy，and reliable parameters are provided for geologic modeling and remaining oil tapping.

Key words: Le-an Oilfield, well logging interpretation model, porosity, permeability, oil saturation, heavy oil