Abstract
As the oilfield enters the development phase of extra-high water content, it is an important precondition to ensure the steady and steady production of the oilfield. Water injection wells washing wells become one of the most important conventional measures to maintain the water absorption capacity of the formation and improve the water injection effect. In this paper, we determined the well flushing displacement in the field flushing operation. We think that different well flushing operation methods for different strata, pressure, permeability and water absorption conditions can effectively improve the well flushing effect of water injection wells, It solves the problem of frequent job re-allocation due to sand burial of sand produced in the formation, reduces the starting pressure of water injection well and preconditions for casing protection.
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