This article will contrapose the practical problems that the present interpretation standard of water flooded layer does not adapt to the?oilfield development at high water-cut stage. Using relative permeability data of coring well on different types of sand body, establish changing relationship between oil/water relative permeability and standardized water saturation, translate the interpretation standard of water flooded layer divided by water production rate into the interpretation standard of water flooded layer divided by water saturation, and build interpretation standard of water flooded layer respectively on different types of sand body in different oil layers at different blocks, to lay the foundation for the fine interpretation of water flooded layer at the high water-cut stage.
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