Wells – Processes – Distinct – separate injection and producing wells
Patent
1984-03-02
1986-04-15
Guynn, Herbert B.
Wells
Processes
Distinct, separate injection and producing wells
166274, 252 855D, E21B 4322
Patent
active
045821380
ABSTRACT:
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.degree. to 10.degree. C. above the reservoir temperature. This method reduces tenside retention as compared with the state of the art.
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Guynn Herbert B.
Huels Aktiengesellschaft
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