| The reservoirs in Lamadian Oilfield generally belongs to river - delta facies,they have thick and serious stacking sand and many types of sedimentation patterns.Sedimentary model determines that the macroscopic heterogeneity of the reservoir itself is serious and complex ,through the past years ,the statistics analysis data of new wells drilled in the core shows that still nearly 1 / 3 thickness of the thick oil layer is not washed, so a lot of residual oil still existence and mainly distributes at the infusion adopt imperfect parts of single sand bodies and the top of thick oil layer.Currently, the main use in the reservoir research is adopting the division of the sedimentary facies, although it solves the methods of dividing the type of reservoir facies and facies classification, but can not really reveal the cause of the continuity of sand bodies. It seems to be the base is insufficient in the fine characterization connectivity to the sand bodies and solving the complex plane contradiction, and it exists unreasonable in dynamic analysis, so it still can't fully meet the dynamic production and demand for fine adjustment. There are still some differences between in the description and analysis of the cause of a single sand body. Based on the demand to cut and tap the potential of the remaining oil in the old area of Daqing oil field in Ultra- water,the text perfects the two-dimensional description of the reservoir in the NE block of the Lamadian Oilfield, and improve the configuration of the causes and characteristics of a single comprehensive study to reveal single sand body,which can reflect more accurately model complex depositional continuity of sand distribution, and further connected to accurately reveal the characteristics of injection,so it can provide more reliable basis for the flat surface adjustment and more accurate three-dimensional distribution of sand model basis,and for the numerical simulation.
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