Anionic Surfactant Gel Treatment Fluid

摘要

Typical viscoelastic surfactant gels used for gravel packing and hydraulic fracturing have relied upon cationic, amphoteric, or zwitterionic surfactants as their primary gelling agent, complicating the stimulation of some wells due to wettability or formation fluid compatibility issues. This paper describes an anionic viscoelastic surfactant developed for fracturing and gravel packing applications. The performance of the gel as a function of temperature, salt type and concentration, and cosurfactant will be presented along with the chemical structure/activity relationship. Rheological measurements demonstrate that fluids made with the new anionic surfactant have effective performance over a range of conditions encountered in treating wells.