Abstract
Abstract During the implementation of polymer flooding, high injection pressure and water cut return occur in the later stage. The early polymer flooding in offshore oilfields is more sensitive to the change of injection and production rate, so it is necessary to explore a new early polymer injection development mode suitable for offshore oilfields. By considering the impact factors of early polymer flooding development in offshore oilfields, such as large well spacing, thick oil layer, early polymer injection timing, limited platform life and space, the "pan type" development mode of polymer flooding water cut in offshore oilfields is established based on experimental research and numerical simulation and achieved the polymer flooding overall infill, polymer/surface binary flooding, unstable polymer flooding technology which has been applied in 3 oilfields in Bohai bay, providing support for the polymer flooding technology development in offshore oil fields in China.
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