| Baikouquan formation of Baikouquan oilfield has developed typical dry alluvial fan reservoir with strong heterogeneity.After 30 years of development,the oilfield has entered the stage of high water cut / ultra-high water cut,and the distribution of remaining oil is becoming increasingly complex.Therefore,it is necessary to study the reservoir configuration of alluvial fan and its control of remaining oil distribution,so as to provide the basis for the following potential tapping measures,well pattern adjustment and polymer flooding scheme.In this study,through collecting and sorting out the data of 347 wells and core observation of 10 cored wells,B2+3 layer is divided into 12 single layers,and the development characteristics of each layer are summarized.Based on the results of core and field geological observation,the sedimentary model of alluvial fan in this area is re established.The vertical and horizontal development characteristics of sand body configuration are analyzed and summarized in different grades,the distribution law of interlayer is determined,and the geological model is established.In the aspect of reservoir characteristics,the macroscopic heterogeneity characteristics are analyzed in layers,layers and planes;the seepage differences of configuration units are analyzed in different lithofacies,different configurations and different configurations;and the classification criteria of reservoir types and dominant channels are identified.Through the recalculation of reserves,the distribution of reserves in different facies zones and different reservoir types is verified,and the remaining oil control factors are summarized.Based on the production data and numerical simulation results,the development characteristics of remaining oil in different facies zones,different types and different modes are quantitatively analyzed,and the guidance suggestions for the next adjustment direction of the oilfield are put forward. |
PDF Full Text Request