Foam composition
Foam compositions and methods of using the foam compositions for treatment of subterranean formations. A method of treating a subterranean formation including placing a foam composition in the subterranean formation. The foam composition can include a blowing agent and a surfactant. The foam composition can include at least one of a) a foam agent including an alkoxylated alcohol ether sulfate, and b) a polysaccharide foam stabilizer.
1. A method of treating a subterranean formation, comprising:
placing a foam composition into a subterranean formation, the foam composition comprising:
about 10 to about 90 vol. %, based on the total volume of the foam composition, of a blowing agent,
about 0.01 to about 10 wt. %, based on the total weight of the foam composition, of a surfactant,
about 0.1 to about 20 wt. %, based on the total weight of the foam composition, of a foam agent comprising an alkoxylated alcohol ether sulfate, and
about 1 to about 30 wt. %, based on the total weight of the foam composition, of a polysaccharide foam stabilizer.
2. The method of claim 1 , wherein the foam composition comprises about 0.1 wt % to about 2 wt % of the surfactant.
3. The method of claim 1 , wherein the surfactant comprises a (C 1 -C 4 )alkylated (C 4 -C 10 )hydrocarbon polyol, wherein about 1% to about 99% of the alcohol units of the polyol are alkylated, and wherein about 1% to about 100% of the alcohol units are esterified with independently selected (C 5 -C 50 )fatty acids.
4. The method of claim 1 , wherein the surfactant comprises an ethoxylated sorbitol ester, wherein about 16% to about 99% of the alcohol units are ethoxylated, and wherein about 1% to about 99% of the alcohol units are esterified with independently selected (C 5 -C 50 )fatty acids.
5. The method of claim 1 , wherein the foam agent is about 1 wt % to about 5 wt % of the foam composition.
6. The method of claim 1 , wherein the alkoxylated alcohol ether sulfate comprises a (C 1 -C 10 )alkoxylated (C 1 -C 20 )alcohol ether sulfate salt foam agent, wherein the (C 1 -C 10 )alkoxy group and the (C 1 -C 20 ) alcohol are each independently substituted or unsubstituted, and wherein the alkoxylation comprises a degree of polymerization of about 1 to about 10.
7. The method of claim 1 , wherein the alkoxylated alcohol ether sulfate comprises a (C 2 -C 4 )alkoxylated (C 6 -C 10 )alcohol ether sulfate salt foam agent, an ammonium salt of an ethoxylated (C 6 -C 10 ) alcohol ether sulfate, or a combination thereof.
8. The method of claim 1 , wherein the foam agent further comprises a (C 1 -C 10 )hydrocarbyl amido (C 1 -C 5 )alkylbetaine, and wherein the (C 1 -C 10 )hydrocarbyl and the (C 1 -C 5 )alkyl are independently substituted or unsubstituted.
9. The method of claim 1 , wherein the foam agent further comprises lauramidopropyl betaine.
10. The method of claim 1 , wherein the foam agent further comprises a (C 1 -C 10 )hydrocarbyl amido (C 1 -C 5 )alkyldimethylamine oxide, and wherein the (C 1 -C 10 )hydrocarbyl and the (C 1 -C 5 )alkyl are independently substituted or unsubstituted.
11. The method of claim 1 , wherein the foam agent further comprises lauramidopropyl dimethylamine oxide.
12. The method of claim 1 , wherein the foam composition comprises about 10 wt % to about 20 wt % of the polysaccharide foam stabilizer.
13. The method of claim 1 , wherein the polysaccharide foam stabilizer comprises (C 6 H 10 O 5 ) n , wherein 40≤n≤3000.
14. The method of claim 1 , wherein the foam composition further comprises a carrier fluid, and wherein the carrier fluid comprises xylenes, ethylbenzene, N-methyl pyrrolidine, or any combination thereof.
15. The method of claim 1 , wherein the foam composition comprises about 30 vol % to about 70 vol % of the blowing agent.
16. The method of claim 1 , wherein the blowing agent comprises at least one of air, a substituted or unsubstituted branched or linear (C 1-5 )alkane, ethane, propane, butane, n-butane, isobutane, pentane, isopentane, cyclopentane, halo (C 1-5 )alkanes, chlorofluorocarbon, CFC-11, CFC-12, hydroflurochlorocarbons, HCFC-22, HCFC-122, HCFC-124, HFC-152a, HFC-143a, HFC-134a, HCFC-141b, HCFC-142b, carbon dioxide, or any combination thereof.
17. The method of claim 1 , wherein the foam composition further comprises a proppant, and wherein the placing of the foam composition in the subterranean formation comprises fracturing at least part of the subterranean formation to form at least one subterranean fracture.
18. A system for performing the method of claim 1 ,
the system comprising:
a tubular disposed in the subterranean formation; and
a pump configured to pump the foam composition in the subterranean formation through the tubular.
19. A method of treating a subterranean formation, comprising:
placing a foam composition in a subterranean formation, the foam composition comprising:
about 0.01 wt % to about 10 wt % of an ethoxylated sorbitol ester surfactant, wherein about 16% to about 84% of the alcohol units are ethoxylated, and wherein about 16% to about 84% of the alcohol units are esterified with independently selected (C 5 -C 50 )fatty acids; and
about 0.1 wt % to about 20 wt % of a foam agent comprising an ammonium salt of an ethoxylated (C 6 -C 10 )alcohol ether sulfate;
about 1 wt % to about 30 wt % of a polysaccharide foam stabilizer;
about 50 wt % to about 90 wt % of a carrier fluid; and
about 10 vol % to about 90 vol % of a blowing agent.
20. A foam composition for treatment of a subterranean formation, comprising:
about 10 to about 90 vol. %, based on the total volume of the foam composition, of a blowing agent;
about 0.01 to about 10 wt. %, based on the total weight of the foam composition, of a surfactant;
about 0.1 to about 20 wt. %, based on the total weight of the foam composition, of a foam agent comprising an alkoxylated alcohol ether sulfate; and
about 1 to about 30 wt. %, based on the total weight of the foam composition, of a polysaccharide foam stabilizer,
wherein the foam composition is a foam.