The Flow Unit Division in the No.1 Fault Block of Pubei Oilfield

The flow unit is a comprehensive reflection of reservoir’s physical characteristics. Based on the basic characteristics of thin narrow sand reservoir, this paper has discussed geological factors which affects seepage characteristics and studied on the flow unit division methods of the thin narrow sand reservoir. Then, the flow unit in the objective layers was studied. The objective layers in the study area were divided into 26 vertical flow units. According to the analysis of coring well and other static data, the flow unit of objective layers in the coring well was divided into four types including ClassⅠ, Class Ⅱ, Class Ⅲ and Class Ⅳ, whose classification standard was set up. For non-coring wells, the flow unit division is in accordiance with the physical parameters of well logging interpretation. Finally, the distribution figures of plane flow unit in each sedimentary unit were drawn. Key words: Thin narrow sand body; Flow unit; Seepage characteristic; Comprehensive quantitative assessment; Reservoir; Pubei oilfield