Quantitative reservoir classification and evaluation based on reservoir microscopic characteristics

Daqing Oilfield Co., Ltd. No.4 Oil Production Plant Geology Institute

Abstract

In view of the remaining oil recovery situation and the needs of the development of tertiary oil recovery technology, using mercury intrusion data, through statistical analysis of the relationship between microscopic pore structure parameters and permeability, it is clear that there is a good correlation between permeability and various microscopic pore structure parameters. It is believed that the reservoir permeability can comprehensively and quantitatively characterize the complexity of the pore structure of the reservoir. The higher the permeability, the weaker the microscopic heterogeneity of the reservoir and the better the reservoir quality. And according to the microscopic characteristics of the reservoir, it is quantitatively divided into Type I reservoir, Type II reservoir, Type III reservoir, Type IV reservoir and Type V reservoir, which realizes the quantitative classification and evaluation of complex reservoirs, which is the best reservoir for reservoirs. The deepening understanding of strata has laid a foundation for the selection of tertiary oil recovery injectors.