A Study On Internal Architecture Of Channel Sand In Meandering River Of The Oilfield Blocks Long 43-39 Fuyu Oil Layer

With the continuous exploration and development of Daqing oil field, how to use scientific and reasonable method to develop oil fields in the late of oil field development and search for the remaining work is the subject of oil field development. To carry out detailed field geology and single sand body within the building structure, able to find new oil and gas reserves, find the distribution of remaining oil and improve the oil field development program provides a scientific basis.In this paper, it uses high resolution sequence stratigraphy, sedimentology fine theory, reservoir sedimentology, oil and gas field development of geology and so on to fine contrast the oilfield blocks long 43-39 Fuyu oil layer,uses the regional geological setting and core to study deposition system- fine sedimentary facies of study area, establishes sedimentary facies patterns in the study area and summarizes point bars of the study area,abandoned channel identification methods and fine characterization of the 21 sedimentary facies map. For a single sand body can not meet the high water cut and the demand for tertiary oil recovery stage, it ignores the impact of the single sand body impermeable thin sandwich (multi<30cm) on reservoir heterogeneity, summing up the single sand body genesis, the formation of micro-process and internal structure; using ideas of a single sand body within the three-dimensional heterogeneity with one side of the meandering point bar deposition model and the side of the integrated stack model, it establishes of a "porosity and permeability to the convex bank crescent-shaped wedge-shaped decrease upward lateral accretion, each echelon side of the stack, during which product is non-permeate side separated by a thin sandwich "and meandering channel sands" Structural control of three-dimensional heterogeneous model of "one side of the main Integrated depositional model, and analyzes the reasons for its formation. Thus it truly reflects a single sand body within the three-dimensional nature of heterogeneity, in this basement to establish a three-dimensional reservoir model. This has the important impact on the internal flow field of a single sand body, flooding into the agent and distribution of remaining oil, which will be important for ertiary oil recovery stage, high water cut staget and after the stage for forecasting and studying residual oil,which for the future point bar sand mining plan provides a new theoretical guidance.