| US 7,507,693 B2 | ||
| Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same | ||
| Yiyan Chen, Richmond, Tex. (US); Jesse C. Lee, Paris (France); and Eric Hanson, San Diego, Calif. (US) | ||
| Assigned to Schlumberger Technology Corporation, Sugar Land, Tex. (US) | ||
| Filed on Dec. 07, 2006, as Appl. No. 11/608,085. | ||
| Prior Publication US 2008/0139410 A1, Jun. 12, 2008 | ||
| Int. Cl. C09K 8/60 (2006.01); C09K 8/62 (2006.01); E21B 43/26 (2006.01) | ||
| U.S. Cl. 507—207 [507/204; 507/240; 507/256; 507/259; 507/265; 507/267; 166/308.2] | 17 Claims |
| 1. A method comprising:
(a) providing a viscoelastic surfactant fluid system comprising a major portion of a surfactant selected from cationic, anionic,
zwitterionic, and amphoteric viscoelastic surfactants, and mixtures thereof, and a rheology enhancer in a concentration of
from about 0.0005 weight % to about 0.05 weight %, said concentration sufficient to shorten shear recovery time of the fluid
system compared to shear recovery time of the fluid system absent the rheology enhancer, the rheology enhancer selected from
aromatic sulfonates having a molecular weight of at least 500 and comprising one or more water-soluble lignosulfonates derived
from wood pulping; and
(b) injecting the fluid system down a well.
|