E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/13, 166/32
E21B 43/22 (2006.01) C09K 8/584 (2006.01)
Patent
CA 1136839
ABSTRACT OF THE DISCLOSURE An improved process is disclosed for recovering oil from an oil-bearing formation by injecting into the formation a liquid containing an effective amount of a surfactant to displace oil, driving the liquid through the formation and recovering the dis- placed oil, the improvement comprising using as the liquid a lamellar lyotropic liquid crystal which exhibits decreasing viscosities at increasing shear rates and contains (a) 0.05 to 10 vol.% of surfactant of balanced hydrophilic-lipophilic character, (b) 0.1 to 20 vol.% of an oil, and (c) the balance brine containing from 5 to 30 wt.% of inorganic salts having sodium chloride as the major component and salts of divalent metals as minor components.
353332
Huang Helen W.
Huang John S.
Oswald Alexis A.
Valint Paul L. Jr.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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