(640c) Novel Zwitterionic Surfactant Based pH-Tunable Dynamic Binary Complex with Potential for Hydraulic Fracturing Applications

Growing concerns about the environment and the current energy demand have pushed research and developmental efforts towards the development of cleaner fracturing fluids. Supramolecular assembly of surfactants into dynamic binary complexes (DBCs) can have wide ranging applications in this context.

Herein, we report a novel long-chained zwitterionic surfactant synthesized by a facile condensation reaction. This surfactant has the potential to form pH-tunable dynamic binary complexes upon dissolution with a complexing agent. Several studies were conducted in order to explore its proppant carrying capability. The viscosity and viscoelastic properties of the resulting solutions were measured as a means to characterize the changes in properties with pH. The effect of temperature on the rheological properties were also taken into consideration. Furthermore, to comprehend the microstructure that actually contributes to the unique properties, a microscopic analysis was also done. Lastly, sand settling tests were conducted to visualize its ability to trap proppant in its complex microstructure.

In conclusion, the use of such dynamic binary complexes in the hydraulic fracturing space has the potential to tackle some of the issues that are currently persistent in the area. It can bring down costs and be a step in the right direction towards recyclable and sustainable options.