Method for breaking petroleum emulsions and the like using thin film spreading agents comprising a polyether polyol

A method for breaking petroleum emulsions of the water-in-oil type characterized by subjecting the emulsion to the action of a homogeneous micellar solution of a thin film spreading agent, comprising:

• (1) from between about 5% and about 75% by weight of a polyether polyol derived from the reaction of an alkylene oxide containing less than about 10 carbon atoms with a member of the group consisting of polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogen groups capable of reaction with alkylene oxides, said polyether polyol having an average molecular weight of about 15,000 or less, said member being derived from reactive hydrogen compounds having 18 or less carbon atoms, said polyether polyol at about 25.degree. C.:
• (A) having a solubility in water and isooctane of less than about 1%, by volume;
• (b) having a solubility parameter from between about 6.8 and about 8.5;
• and (C) spreading at the interface between white, refined mineral oil and distilled water to form a film having a calculated thickness no greater than about 20 Angstroms, at a spreading pressure of about 16 dynes per cm;
• (2) from between about 2% and about 30% by weight of a hydrotropic agent comprising a semi-polar hydrogen bond forming compound containing at least one of oxygen, nitrogen and sulfur and from between about 2 and about 12 carbon atoms;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• and (4) from between about 15% and about 90% by weight, water.

A method of recovering oil from an oil-bearing formation into which a well bore extends, comprising the steps of:

• (I) generating steam at the surface;
• (II) supplying said steam to said oil-bearing formation by way of said well bore;
• (III) supplying a homogeneous micellar solution of a thin film spreading agent to said oil-bearing formation to inhibit the production of oil-water emulsion as a result of the interaction of said steam with the oil and water in the formation, said micellar solution comprising:
• (1) from between about 5% and about 75% by weight of a polyether polyol having the formula:
• ##STR9## wherein:
• A is an alkylene oxide group, --C.sub.i H.sub.2i O--;
• O is oxygen;
• i is a positive integer from 2 to 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 polyether polyol at about 25.degree. 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) from between about 2% and about 30% by weight of a hydrotropic agent having one of the formulas:
• X--Z (A)
• wherein X is an alkyl, alicyclic, aromatic, alkylalicyclic, alkylaryl, arylalkyl, alicyclicalkyl, heterocyclic or substituted heterocyclic radical having 2 to 13 carbon atoms;
• and wherein Z is one of:
• --OH;
• ##STR10## --COOH;
• and --OCH.sub.3 ;
• and U and V are hydrogen or hydrocarbon substituents;
• X--Y--R--(Z).sub.n, (B)
• wherein;
• Z is one of --OH;
• ##STR11## --COOH;
• and --OCH.sub.3 ;
• X is an alkyl, alicyclic, aromatic, alkylalicyclic, alkylaryl, arylalkyl, alicyclicalkyl, heterocyclic or substituted heterocyclic radical having 2 to 12 carbon atoms;
• R is a member selected from the class consisting of, --CH.sub.2 --, --C.sub.2 H.sub.4 --, C.sub.3 H.sub.5 .dbd., --C.sub.3 H.sub.6, and --C.sub.2 H.sub.4 --O--C.sub.2 H.sub.4 --;
• n is either a one or two integer;
• the integer dependent upon the selection of R;
• U and V are hydrogen or hydrocarbon substituents;
• and
• Y is a member selected from the class consisting of:
• ##STR12## --O--, and --S--;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• (4) from between about 15% and about 90% by weight, water;
• and (IV) recovering from said formation oil and water which was subjected to the action of said steam.

A method of recovering oil from an oil-bearing formation into which a well bore extends, comprising the steps of:

• (I) generating steam at the surface;
• (II) supplying said steam to said oil-bearing formation by way of said well bore;
• (III) supplying a homogeneous micellar solution of a thin film spreading agent to said oil-bearing formation to inhibit the production of oil-water emulsion as a result of the interaction of said steam with the oil and water in the formation, said micellar solution comprising:
• (1) from between about 5% and about 75% by weight of a polyether polyol derived from the reaction of an alkylene oxide containing less than about 10 carbon atoms with a member of the group consisting of polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogen groups capable of reaction with alkylene oxides, said polyether polyol having an average molecular weight of about 15,000 or less, said member being derived from reactive hydrogen compounds having 18 or less carbon atoms, said polyether polyol at about 25.degree. C.:
• (A) having a solubility in water and isooctane of less than about 1%, by volume;
• (B) having a solubility parameter from between about 6.8 and about 8.5;
• and (C) spreading at the interface between white, refined mineral oil and distilled water to form a film having a calculated thickness no greater than about 20 Angstroms, at a spreading pressure of about 16 dynes per cm;
• (2) from between about 2% and about 30% by weight of a hydrotropic agent comprising a semi-polar hydrogen bond forming compound containing at least one of oxygen, nitrogen and sulfur and from between about 2 and about 12 carbon atoms;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• and (4) from between about 15% and about 90% by weight, water;
• and (IV) recovering from said formation oil and water which was subjected to the action of said steam.

A method of breaking petroleum or bitumen emulsions of water comprising contacting the emulsion with a sufficient emulsion-breaking amount of a homogeneous micellar solution of a thin film spreading agent, said micellar solution comprising:

• (1) from between about 5% and about 75% by weight of a polyether polyol derived from the reaction of an alkylene oxide containing less than about 10 carbon atoms with a member of the group consisting of polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogen groups capable of reaction with alkylene oxides, said polyether polyol having an average molecular weight of about 15,000 or less, said member being derived from reactive hydrogen compounds having 18 or less carbon atoms, said polyether polyol at about 25.degree. C.:
• (A) having a solubility in water and isooctane of less than about 1%, by volume;
• (B) having a solubility parameter from between about 6.8 and about 8.5;
• and (C) spreading at the interface between white, refined mineral oil and distilled water to form a film having a calculated thickness no greater than about 20 Angstroms, at a spreading pressure of about 16 dynes per cm;
• (2) from between about 2% and about 30% by weight of a hydrotropic agent comprising a semi-polar hydrogen bond forming compound containing at least one of oxygen, nitrogen and sulfur and from between about 2 to about 12 carbon atoms;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• and (4) from between about 15% and about 90% by weight, water.

In the method of preventing the formation of emulsions of an aqueous phase and a petroleum oil or bitumen phase, the improvement comprising:

• contacting at least one of said petroleum, bitumen or water phases with an effective emulsion preventing amount of a homogeneous micellar solution of a thin film spreading agent, said micellar solution of a thin film spreading agent, said micellar solution comprising:
• (1) from between about 5% and about 75% by weight of a polyether polyol derived from the reaction of an alkylene oxide containing less than about 10 carbon atoms with a member of the group consisting of polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogen groups capable of reaction with alkylene oxides, said polyether polyol having an average molecular weight of about 15,000 or less, said member being derived from reactive hydrogen compounds having 18 or less carbon atoms, said polyether polyol at about 25.degree. C.:
• (A) having a solubility in water and isooctane of less than about 1%, by volume;
• (B) having a solubility parameter from between about 6.8 and about 8.5;
• and (C) spreading at the interface between white, refined mineral oil and distilled water to form a film having a calculated thickness no greater than about 20 Angstroms, at a spreading pressure of about 16 dynes per cm;
• (2) from between about 2% and about 30% by weight of a hydrotropic agent comprising a semi-polar hydrogen bond forming compound containing at least one of oxygen, nitrogen and sulfur and from between about 2 and about 12 carbon atoms;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• and (4) from between about 15% and about 90% by weight, water.

In the method of preventing the formation of emulsions of an aqueous phase and a petroleum oil or bitumen phase, the improvement comprising:

• contacting said petroleum oil or bitumen phase prior to or coincident with its contact with the aqueous phase with an effective emulsion preventing amount of a homogeneous micellar solution of a thin film spreading agent, said micellar solution comprising:
• (1) from between about 5% and about 75% by weight of a polyether polyol derived from the reaction of an alkylene oxide containing from about 2 to about 10 carbon atoms with a member of the group consisting of polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogen groups capable of reaction with alkylene oxides, said polyether polyol having an average molecular weight of about 15,000 or less, said member being derived from reactive hydrogen compounds having 18 or less carbon atoms, said polyether polyol at about 25.degree. C.:
• (A) having a solubility in water and isooctane of less than about 1%, by volume;
• (B) having a solubility parameter from between about 6.8 and about 8.5;
• and (C) spreading at the interface between white, refined mineral oil and distilled water to form a film having a calculated thickness no greater than about 20 Angstroms, at a spreading pressure of about 16 dynes per cm;
• (2) from between about 2% and about 30% by weight of a hydrotropic agent comprising a semi-polar hydrogen bond forming compound containing at least one of oxygen, nitrogen and sulfur and from between about 2 and about 12 carbon atoms;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• and (4) from between about 15% and about 90% by weight, water.

In the method of breaking and preventing emulsions of water in bitumen during the recovery of bitumen from tar sands or subterranean deposits by steaming, flooding or combinations thereof, the improvement comprising:

• contacting said bitumen with a homogeneous micellar solution of a thin film spreading agent, said micellar solution comprising:
• (1) from between about 5% and about 75% by weight of a polyether polyol derived from the reaction of an alkylene oxide containing less than about 10 carbon atoms with a member of the group consisting of polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogen groups capable of reaction with alkylene oxides, said polyether polyol having an average molecular weight of about 15,000 or less, said member being derived from reactive hydrogen compounds having 18 or less carbon atoms, said polyether polyol at about 25.degree. C.:
• (A) having a solubility in water and isooctane of less than about 1%, by volume;
• (B) having a solubility parameter from between about 6.8 and about 8.5;
• and (C) spreading at the interface between white, refined mineral oil and distilled water to form a film having a calculated thickness no greater than about 20 Angstroms, at a spreading pressure of about 16 dynes per cm;
• (2) from between about 2% and about 30% by weight of a hydrotropic agent comprising a semi-polar hydrogen bond forming compound containing at least one of oxygen, nitrogen and sulfur and from between about 2 and about 12 carbon atoms;
• (3) from between about 2% and about 30% by weight of an amphipathic agent having at least one radical having from between about 10 and about 64 carbon atoms per molecule;
• and (4) from between about 15% and about 90% by weight, water.