Enhanced foam stability applications and methods
View Patent ↗A method for enhancing foam stability in foaming compositions for use in oilfield treatment application, including but not limited to use in mobility control for gas flooding. The method comprises the step of adding to a foaming composition a foam stabilizer of formula (I): wherein R 1 is an alkylamido group or a branched or linear alkyl group; R 2 and R 3 are individually hydrogen or a methyl group; R 4 , R 5 and R 6 are individually hydrogen or a hydroxy group, with the proviso that at least one of R 4 , R 5 or R 6 is a hydroxyl group; wherein the alkyl group has greater than about 10 carbon atoms. Also disclosed are methods to enhance foam stability in an aqueous foaming composition.
1. A method for enhancing recovery of oil from an oil-bearing formation within a reservoir, comprising:
(a) introducing a foaming composition comprising an alpha olefin sulfonate under pressure into the oil-bearing formation;
(b) introducing a gas under pressure into the oil-bearing formation, wherein the presence of the foaming composition affects the flow of gas within the oil-bearing formation; and
(c) extracting oil through a wellbore in the reservoir,
wherein the foaming composition comprises a foam stabilizer chosen from alkyl amidopropyl hydroxy sulfobetaine or alkyl hydroxy sulfobetaine, wherein the alkyl group is an integer from between about 10 carbon atoms to about 24 carbon atoms.
2. The method of claim 1 wherein the alkyl group is an integer from between about 12 carbon atoms to about 24 carbon atoms.
3. The method of claim 1 wherein the alkyl group is an integer from between about 18 carbon atoms to about 24 carbon atoms.
4. The method of claim 1 wherein the foaming composition further comprises water and, optionally, a foaming gas.
5. The method of claim 1 wherein the gas comprises carbon dioxide, air, nitrogen, natural gas, steam, flue gas or any combination thereof.
6. The method of claim 1 wherein the step of introducing the foaming composition into an oil bearing formation includes introducing the foaming composition into one or more fracture networks located within the oil bearing formation.
7. The method of claim 1 wherein the step of introducing the gas into an oil bearing formation includes introducing the gas into one or more matrix portions located within the oil bearing formation.
8. The method of claim 1 wherein the foaming composition further comprises a cationic polymer.
9. The method of claim 1 , wherein the foaming composition further comprises a cationic polymer selected from the group consisting of galactomannan gums and their derivatives, glucomannan gums and their derivatives, guar gum, locust bean gum, cara gum, hydroxyethyl guar, hydroxypropyl guar, cationically modified cellulose, hydroxypropyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, acrylamide, polyvinyl alcohol, a copolymer of acrylamide, and combinations thereof, having a quaternized amine functionality.
10. The method of claim 1 wherein the foaming composition further comprises a synthetic polymer comprising copolymers of 1-vinyl-2-pyrrolidine and salts thereof, copolymers of 1-vinyl-3-methyl-imidazolium salts, copolymers of 1-vinyl-2-pyrrolidine, copolymers of dimethylaminoethyl methacrylate, dimethyldiallyammonium chloride polymers, copolymers of acrylamide, copolymers of dimethyldiallylammonium chloride, cationic polyacrylamides.
11. A method for enhancing recovery of oil from an oil-bearing formation within a reservoir, comprising:
(a) introducing a foaming composition comprising an alpha olefin sulfonate under pressure into the oil-bearing formation;
(b) introducing a gas under pressure into the oil-bearing formation, wherein the presence of the foaming composition affects the flow of gas within the oil-bearing formation; and
(c) extracting oil through a wellbore in the reservoir,
wherein the foaming composition comprises a foam stabilizer having formula (I):
wherein R1 is an alkylamido group or a linear or branched alkyl group; R2 and R3 are individually hydrogen, a methyl group or a hydroxyethyl group; R4, R5 and R6 are individually hydrogen or a hydroxy group, with the proviso that at least one of R4, R5 or R6 is a hydroxyl group, wherein the alkyl group is an integer from between about 10 carbon atoms to about 24 carbon atoms.
12. The method of claim 11 wherein the alkyl group is an integer from between about 12 carbon atoms to about 24 carbon atoms.
13. The method of claim 11 wherein the alkyl group is an integer from between about 18 carbon atoms to about 24 carbon atoms.
14. The method of claim 11 wherein R1 is the alkylamido group, the alkylamido group having formula (II):
wherein R7 is a linear or branched alkyl group having greater than about 15 carbon atoms, wherein n is an integer from 2 to 5.
15. The method of claim 14 wherein R7 is a linear or branched alkyl group having greater than about 16 carbon atoms.
16. The method of claim 11 wherein the foam stabilizer is of formula (III)
wherein R1 is an alkylamido group or a linear or branched alkyl group; R2 and R3 are individually hydrogen, a methyl group or a hydroxyethyl group; wherein the alkyl group is an integer from between about 10 carbon atoms to about 24 carbon atoms.
17. The method of claim 11 , wherein the foaming composition has up to about 20 lbs/gal water of organic and inorganic salts.
18. The method of claim 11 wherein the step of introducing the foaming composition into an oil bearing formation includes introducing the foaming composition into one or more fracture networks located within the oil bearing formation.
19. The method of claim 11 wherein the step of introducing the gas into an oil bearing formation includes introducing the gas into one or more matrix portions located within the oil bearing formation.
20. The method of claim 11 wherein the foaming composition further comprises a cationic polymer.
21. The method of claim 11 , wherein the foaming composition further comprises a cationic polymer selected from the group consisting of galactomannan gums and their derivatives, glucomannan gums and their derivatives, guar gum, locust bean gum, cara gum, hydroxyethyl guar, hydroxypropyl guar, cationically modified cellulose, hydroxypropyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, acrylamide, polyvinyl alcohol, a copolymer of acrylamide, and combinations thereof, having a quaternized amine functionality.
22. The method of claim 11 , wherein the foaming composition further comprises a synthetic polymer comprising copolymers of 1-vinyl-2-pyrrolidine and salts thereof, copolymers of 1-vinyl-3-methyl-imidazolium salts, copolymers of 1-vinyl-2-pyrrolidine, copolymers of dimethylaminoethyl methacrylate, dimethyldiallyammonium chloride polymers, copolymers of acrylamide, copolymers of dimethyldiallylammonium chloride, cationic polyacrylamides.