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IMPROVING THE ASSISTED RECOVERY OF PETROLEUM BY POLYMER WITHOUT EQUIPMENT OR COMPLEMENTARY PRODUCT.
IMPROVING THE ASSISTED RECOVERY OF PETROLEUM BY POLYMER WITHOUT EQUIPMENT OR COMPLEMENTARY PRODUCT.
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机译:在没有设备或补充产品的情况下,通过聚合物改善石油的回收率。
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摘要
A method for enhanced oil recovery in an oil-bearing formation having high permeability zones, constituting preferential passages for the injected liquid, involves blocking the preferential passages by injecting into the formation an aqueous solution based on water soluble polymers at a concentration such that the viscosity of the aqueous solution is higher than the viscosity of the oil. Once the blocking step is completed, an aqueous solution is injected having an identical composition to that used in the blocking step, but at a lower polymer concentration.
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