Study on Flow Unit and Remaining Oil Distribution in Sandstone Reservoir of Bo21 Block in Gudao Oilfield

摘要

This paper introduces grey system theory in reservoir flow unit research. The parameters such as flow zone indicator, porosity, permeability, shale content, grain size median, etc, which can characterize reservoir characteristic are selected as evaluation parameters. Reservoir flow units in Bo21 Block, Gudao Oilfield, are classified as five types according to evaluation criterion established by grey system theory. Then this paper discuss the main features of each flow unit combination with geological and performance data in this paper. At last, authors point out Ⅱ and Ⅲ type flow units are main zones of remaining oil distribution at present by analyzing relation of flow unit and remaining oil, which are the main targets to adjust potentially further.