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Methodfor oil recovery from reservoir rock formations
Methodfor oil recovery from reservoir rock formations
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机译:从储层岩层中采油的方法
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摘要
A process for the tenside flooding of reservoirs of medium and high salinities, comprises injecting an emulsion of an oil phase, an aqueous phase, and carboxymethylated oxethylate by flooding before and/or after a solution or dispersion of carboxymethylated oxethylate. In each case, the tenside and/or the emulsifier is selected so that the phase inversion temperature of the system of reservoir oil/flooding water/tenside/optional additives or reservoir oil/flooding water/emulsifier/optional additives, respectively, lies about 0 to 10 C. above the reservoir temperature. This method reduces tenside retention as compared with the state of the art.
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