Investigation of Drag Reduction by Polymers under Salty Conditions in Microtubes through Surface Response Methodology in Turbulent Flow

Improving unconventional oil and gas field development efficiency via hydraulic fracturing is crucial for the energy industry and sustainability. However, conventional technologies face inefficiencies and high costs in high salinity environments. This study explores polymer turbulence dampening technology in microtubes under saline conditions to reduce friction and operational costs, promoting environmental friendliness. Using a micro-flow device, drag reduction rates were examined across different flow rates, salt concentrations, and polymer concentrations. Results show that drag reduction generally increases with flow rate but has a complex relationship with salt and polymer concentrations, being typically lower in salt-containing solutions. A regression model developed through surface response methodology (RSM) predicts a maximum drag reduction rate of 44% under optimized conditions. The study also reveals that salt limits polymer activity, affecting drag reduction efficacy. This research enhances hydraulic fracturing efficiency in saline conditions, supporting cost-effectiveness and sustainable practices in the energy sector.