Natural oil-derived wellbore compositions and methods of use
View Patent ↗Compositions useful as wellbore fluids are generally disclosed. In some embodiments, the compositions include polymerizable olefinic surfactant compositions, which, under certain conditions, can polymerize via free-radical polymerization to form surfactant polymers. In some embodiments, the compositions are introduced to an oil well as part of the drilling or extraction process, e.g., to assist in flushing hydrocarbon material out of subterranean formations.
1. A wellbore composition, comprising:
surfactant compounds comprising a hydrophilic head portion and a hydrophobic tail portion, and an aqueous carrier;
wherein at least a portion of the surfactant compounds have a hydrophobic tail portion having 21 or more carbon atoms; and
wherein the wellbore composition is a microemulsion.
2. The wellbore composition of claim 1 , wherein at least a portion of the surfactant compounds comprise a hydrophobic tail portion having 23 or more carbon atoms.
3. The wellbore composition of claim 2 , wherein the hydrophobic tail portion having 23 or more carbon atoms is: —(CH 2 ) 8 —CH═CH—(CH 2 ) 13 —CH 3 , —(CH 2 ) 8 —CH═CH—(CH 2 ) 15 —CH 3 , —(CH 2 ) 8 —CH═CH—(CH 2 ) 17 —CH 3 , —(CH 2 ) 8 —CH═CH—(CH 2 ) 19 —CH 3 , —(CH 2 ) 8 —CH═CH—(CH 2 ) 21 —CH 3 , —(CH 2 ) 8 —CH═CH—(CH 2 ) 23 —CH 3 , —(CH 2 ) 8 —CH═CH—(CH 2 ) 25 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 13 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 15 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 17 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 19 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 21 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 23 —CH 3 , —(CH 2 ) 12 —CH═CH—(CH 2 ) 25 —CH 3 , or any combination thereof.
4. The wellbore composition of claim 2 , wherein the hydrophobic tail portion having 23 or more carbon atoms is:
—C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 13 —CH 3 , —C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 15 —CH 3 , —C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 17 —CH 3 , —C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 19 —CH 3 , —C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 21 —CH 3 , —C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 23 —CH 3 , —C(═O)—(CH 2 ) 7 —CH═CH—(CH 2 ) 25 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 13 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 15 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 17 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 19 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 21 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 23 —CH 3 , —C(═O)—(CH 2 ) 11 —CH═CH—(CH 2 ) 25 —CH 3 , or any combination thereof.
5. The wellbore composition of claim 2 , wherein the hydrophilic head portion is an anionic surfactant head group, a cationic surfactant head group, a zwitterionic head group, a non-ionic surfactant head group, or any combination thereof.
6. The wellbore composition of claim 1 , wherein the surfactant compounds are compounds of formula (I):
wherein: X 1 is C 1-24 alkylene, which is optionally oxidized at the carbon atom adjacent to R 1 , and is optionally substituted;
R 1 is a hydrophilic moiety;
R 2 is C 1-60 alkyl or C 2-60 alkenyl, each of which is optionally substituted; and
R 3 is —H or C 1-6 alkyl, which is optionally substituted.
7. The wellbore composition of claim 6 , wherein R 1 is an anionic surfactant head group, a cationic surfactant head group, a zwitterionic head group, or a non-ionic surfactant head group.
8. The wellbore composition of claim 7 , wherein R 1 comprises a quaternary ammonium group, which is optionally substituted.
9. The wellbore composition of claim 6 , wherein X 1 is —(C═O)—(CH 2 ) 7 — or —(CH 2 ) 8 —.
10. The wellbore composition of claim 9 , wherein R 3 is —H.
11. The wellbore composition of claim 1 , further comprising one or more additives or additional ingredients.
12. A method of treating a well, comprising:
introducing to a well the wellbore composition of claim 1 .
13. A method of increasing the permeability of a hydrocarbon-containing subterranean formation, comprising:
contacting a subterranean hydrocarbon-containing formation with the wellbore composition of claim 1 .