The Sedimentary And Reservoirs Characteristics Of Bentiu Oil Reservoir In Heglig Oilfield，Sudan

The research of domestic and international oilfield of high water cut show that in the later period of oilfield development,make sand layer as a unit of reservoir description and understanding of reservoir has can’t meet the needs of the remaining oil distribution study,in order to maintain production while reducing mining costs,we must "know the remaining oil,residual oil discovery." However,the internal structure and reservoir sand bodies heterogeneity is a major factor controlling the distribution of the remaining oil,so fine description of reservoir deposition is particularly important.In this paper,based on the core observation in the study area,logging data analysis,micro structure and sand body anatomy structure and reservoir heterogeneity research work on the 124 district of Bentiu of Heglig oil field geological characteristics of reservoir group is studied,mainly including Heglig field wellblock stratigraphic division and correlation,structural characterization,sedimentary microfacies and sand body,research shows that: Bentiu oil layer thicker,more within 20-30 meters;Bentiu reservoir in a braided river sand,sand continuous development,connectivity is good;good physical properties: porosity within the range of 23%-25%,penetration rate in the range 500-3000md;Among small reservoir layer physical property differences between the strong heterogeneity;studies show Bentiu oil group was good hydrocarbon reservoir,is a strong massive reservoir bottom water,energy sufficient,the use of natural energy development.