The Research For Internal Architecture Of The P â… 1-4Layers Which Is In The Test Area After Polymer Flooding Of The Beiyi Block First Class Layers

The polymer flooding is the leading exploited technology for the first class layers after water flooding. Since the application and dissemination of the polymer flooding has been industrialized, there were fifty eight industralization blocks by polymer flooding, and twenty six of which has been in the subsequent water flooding. Though the polymer flooding can enlarge swept area and enhance oil-displacing efficiency, nearly half of the oil is remined in the reservoir after polymer flooding. In order to explore the better technology to enhance oil recovery, the test area by polymer-surfactant flooding, Since1999in Sazhong development area to carry out a pilot test, but because of a class of reservoir physical properties and polymer flooding has bigger difference, the test the results are different.In order to explore the better technology to enhance oil recovery, the test area by polymer-surfactant flooding in the Beiyi block was hewed out in Sep2009. Through the fine compartmentalized and parallelled of the complex and compound layers, the paper established the isochronous high-resolution contrast framework of whole region. It set up the loggingmicrofacies patterns of the power unit with two facies, five intrafacies, twelve microfacies, four river channels. Through the systematic study and analysis of the reservoir characteristics and residual oil distribution law, the paper came to the conclusion that the remaining oil in point-bar sand body had four distribution pattern in the high water cut period, because of the double influence of lateral accretion bedding and perforation position. The research in this paper will provide evidence for the research on the producing adjustment of the blocks after water flooding.