Abstract
The development of temperature-resistant and salt-resistant clean fracturing fluid (CFF) is critical for the exploration of oil & gas resources in deep wells. Herein, using a rigid-soft combined strategy, we have designed a sulfonic Gemini zwitterionic viscoelastic surfactant, namely EDBS, which consists of ultra-long hydrophobic chains, benzene rings and sulfonic acid. CFF exhibited good viscoelasticity caused by the strong network structures formed by entangled wormlike micelles in solution. The CFF containing EDBS showed superior thermo-shearing in the 25% standard brine solution after 120 min at 170 s−1 and 120 °C, demonstrating promising high performance in reservoirs with high temperature and high salinity. These exciting results present strong potential for EDBS as a high- performance fracturing fluid for geothermal and fossil energy production.
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