Surfactant mixtures for tertiary oil recovery

Details Surfactant mixtures for tertiary oil recovery Surfactant mixtures for tertiary oil recovery

2006-06-08

2011-11-08

Kugel, Timothy J. (Department: 1763)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S239000, C507S936000, C166S275000

Reexamination Certificate

active

08053396

ABSTRACT:
Use of a mixture comprising a surfactant and a cosurfactant in the form of an aqueous solution for flooding underground deposits of hydrocarbons for mobilizing and recovering the hydrocarbons from the underground deposits, the cosurfactant being a substance or a group of substances selected from the following list:an amphiphilic comb polymer having a backbone with two or more side chains attached to the backbone, the side chains differing from one another and/or the side chains differing from the backbone in their amphiphilic character,an amphiphilic polymer having one or more hydrophobic subunits [A2] based on a polyisobutene block, at least 50 mol % of whose polyisobutene macromolecules have terminally arranged double bonds, and one or more hydrophilic subunits [B2], oran amphiphilic polymer having the general structural formula

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Taylor et al., “Water-soluble hydrophobically associating polymers for improved oil recovery: A literature review”,Journal of Petroleum Science and Engineering,vol. 19, pp. 265-280 (1998).

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