Research On Viscosity Behavior Of Sulfonate Anionic Gemini Surfactant Solution

In order to construct high-temperature novel clean fracturing fluid, the viscosity of sulfonate anionic Gemini surfactants (DS-m-s-m) solution were measured by means of the rheometer through changing the carbon chain length (m= 12,14,16,18). The most optimal thickening anionic Gemini surfactant was DS-18-3-18. Moreover, the effects of additives (inorganic salt, organic salt, organic alcohol and SDBS) on the viscosity of DS-18-3-18 solution were studied systematically. The results indicate that the viscosity of DS-18-3-18 solution increases with the increase of its concentration, and has a rapid rise after the concentration is more than 4%. The viscosity of 4% DS-18-3-18 solution reduces with the KCl or sodium benzoate added, however, increases with the increase of SDBS or dodecanal concentration. Especially the solution (4% DS-18-3-18+3% dodecanal) has high temperature resistance (100 degrees C, 25.24mPa.s), can meet the requirements of fracturing construction at high temperature.