Method of recovering petroleum from a subterranean reservoir incorporating an acylated polyether polyol
The method of recovering petroleum from a subterranean reservoir preferably comprising the steps of: (1) introducing through an intection well a predeterminable amount of an acylated polyether polyol, the polyether polyol thereof having the formula (O(A)/sub j/H)/sub n/-R-(NR/sup 1/((A)/sub k/H))/sub m/ wherein A is an alkylene oxide group, -C/sub i/H//sub 2/iO-; O is oxygen; i is a positive integer no greater than about 10; j is a positive integer no greater than about 100; k is a positive integer no greater than about 100; N is nitrogen; R/sup 1/ is one of hydrogen, a monovalent hydrocarbon group containing less than about C/sub 11/, or (A/sub L/H); L is a positive integer no greater than about 100; R is a hydrocarbon moiety of a polyol, a primary or secondary amine, a primary or secondary polyamine, a primary or secondary amino alcohol, or hydrogen; and m+n is no greater than about 4 when R is other than hydrogen and one of M and N is zero and the other is unity when R is hydrogen, said acylated polyether polyol being the reaction product of said polyether polyol and a member selected from the class consisting of mono- and polybasic carboxylic acids, acid anhydrides, and iso-, diiso-, and polyisocyanates, said acylated polyether polyol at about 25/sup 0/C: (A) being less than about 1% by volume soluble in water and in isooctane; (B) having a solubility parameter in the range of between about 6.9 and about 8.5; and (C) spreading at the interface between distilled water and refined mineral oil to form a film having a thickness no greater than about 20 angstroms at a film pressure of about 16 dynes per cm; (2) contacting said petroleum in said reservoir with an effective thin film forming amount of said acylated polyether polyol; and (3) introducing into the formation an aqueous injection medium to urge said petroleum toward and through a producing well.
- Assignee:
- Magna Corp
- Patent Number(s):
- US 4216828
- OSTI ID:
- 6812173
- Resource Relation:
- Patent File Date: Filed date 4 Jun 1979
- Country of Publication:
- United States
- Language:
- English
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