초록

A composition comprising an alcohol ether sulfonate and a quaternary ammonium salt is provided for use in methods of increasing recovery of crude oil from a subterranean hydrocarbon-containing formation.

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1. A method of increasing recovery of crude oil from a subterranean hydrocarbon-containing formation, the method comprising: injecting a composition into a well which is in contact with the subterranean hydrocarbon-containing formation in an amount effective for lowering the interfacial tension betw

1. A method of increasing recovery of crude oil from a subterranean hydrocarbon-containing formation, the method comprising: injecting a composition into a well which is in contact with the subterranean hydrocarbon-containing formation in an amount effective for lowering the interfacial tension between fracturing fluid and oil trapped within the formation and changing the wettability of the subterranean hydrocarbon-containing formation to recover the crude oil from the subterranean hydrocarbon-containing formation, the composition comprising: an alcohol ether sulfonate having formula I: wherein: R1 is alkyl;R2 is alkylene;R3 and R4 are each independently ethylene or propylene;R5 is hydroxyl and R6 is —SO3M, or R5 is —SO3M and R6 is hydroxyl;M is independently an alkali metal, an alkaline earth metal, hydronium, NH3 or NH2; anda and b are each independently an integer from 0 to 30, and a+b equals 1 to 60; anda quaternary ammonium salt having the formula II: wherein: R10 and R11 are independently C8 to C30 alkyl;R12 and R13 are independently lower alkyl; andX− is an anion;the weight ratio of the alcohol ether sulfonate to quaternary ammonium salt ranging from about 40:1 to about 1:1. 2. The method of claim 1, wherein the alcohol ether sulfonate has the formula III wherein: R3 is isopropylene and R4 is ethylene, or R3 is ethylene and R4 is isopropylene;R5 is hydroxyl and R6 is —SO3M, or R5 is —SO3M and R6 is hydroxyl;M is independently Na, K, Ca, Mg, hydronium, NH3 or NH2;x and y are each independently an integer from 0 to 27, and x+y equals 5 to 27; anda and b are each independently an integer from 0 to 30, and a+b equals 1 to 60. 3. The method of claim 1, wherein the alcohol ether sulfonate has the formula III, x and y are each independently an integer from 0 to 15, and x+y equals 5 to 15. 4. The method of claim 3, wherein a is 2 to 25, b is 2 to 25, and a+b equals 4 to 50. 5. The method of claim 3, wherein a is 3 to 20, b is 6 to 20, and a+b equals 9 to 40. 6. The method of claim 3, wherein a is 5 to 18, b is 10 to 12, and a+b equals 15 to 30. 7. The method of claim 1, further comprising injecting a viscosifying agent, a solvent, an alkali, a flow back aid, a non-emulsifier, a friction reducer, a breaker, a crosslinking agent, a biocide, or a proppant into the well. 8. The method of claim 1, wherein the subterranean hydrocarbon-containing formation comprises a sandstone reservoir or a carbonate reservoir. 9. The method of claim 1, wherein R10 and R11 are independently C8 to C18 alkyl and R12 and R13 are independently methyl or ethyl. 10. The method of claim 1, wherein the weight ratio of the alcohol ether sulfonate to quaternary ammonium salt ranging from about 20:1 to about 1:1. 11. The method of claim 1, further comprising a carrier which comprises water, an alcohol, an ether, a glycol, or a combination thereof. 12. The method of claim 1, wherein the injecting step occurs after hydraulic fracturing of the well. 13. The method of claim 1, wherein the injecting step occurs during hydraulic fracturing of the well. 14. A method of increasing recovery of crude oil from a subterranean hydrocarbon-containing formation, the method comprising: injecting an alcohol ether sulfonate and a quaternary ammonium salt into a well which is in contact with the subterranean hydrocarbon-containing formation in an amount effective for lowering the interfacial tension between fracturing fluid and oil trapped within the formation and changing the wettability of the subterranean hydrocarbon-containing formation to recover the crude oil from the subterranean hydrocarbon-containing formation,wherein the alcohol ether sulfonate has the formula I: wherein: R1 is alkyl;R2 is alkylene;R3 and R4 are each independently ethylene or propylene;R5 is hydroxyl and R6 is —SO3M, or R5 is —SO3M and R6 is hydroxyl;M is independently an alkali metal, an alkaline earth metal, hydronium, NH3 or NH2; anda and b are each independently an integer from 0 to 30, and a+b equals 1 to 60;the quaternary ammonium salt has the formula II: wherein: R10 and R11 are independently C8 to C30 alkyl;R12 and R13 are independently lower alkyl; andX is an anion; andthe weight ratio of the alcohol ether sulfonate to quaternary ammonium salt ranges from about 40:1 to about 1:1. 15. The method of claim 14, wherein R10 and R11 are independently C8 to C18 alkyl and R12 and R13 are independently methyl or ethyl. 16. The method of claim 15, wherein X− is a halide, a sulfate, a nitrate, a nitrite, a carbonate, or a carboxylate. 17. The method of claim 14, wherein the weight ratio of the alcohol ether sulfonate to quaternary ammonium salt ranging from about 20:1 to about 1:1. 18. The method of claim 14, further comprising a carrier which comprises water, an alcohol, an ether, a glycol, or a combination thereof. 19. The method of claim 14, wherein the alcohol ether sulfonate and the quaternary ammonium salt are injected sequentially into the well. 20. The method of claim 14, wherein the alcohol ether sulfonate has the formula III wherein: R3 is isopropylene and R4 is ethylene, or R3 is ethylene and R4 is isopropylene;R5 is hydroxyl and R6 is —SO3M, or R5 is —SO3M and R6 is hydroxyl;M is independently Na, K, Ca, Mg, hydronium, NH3 or NH2;x and y are each independently an integer from 0 to 27, and x+y equals 5 to 27; anda and b are each independently an integer from 0 to 30, and a+b equals 1 to 60.