Publications by authors named "Caifu Zhi"
Article Synopsis
- Emulsion drag reducers are crucial for slickwater fracturing fluids but face stability issues when traditional hydrophilic surfactants are added, leading to poor performance.
- Researchers created a pH-responsive polymer emulsion (P(AM-AA-AMPS)) that remains stable while overcoming the release challenges faced by traditional emulsions, thanks to the use of switching solvents and pH stimulation.
- The P(AM-AA-AMPS) emulsion shows impressive performance with a 73% drag-reduction rate and improved release efficiency (33% higher than traditional emulsions), making it promising for extracting oil and gas from low-permeability resources.
Additional hydrophilic surfactants are generally introduced into W/O emulsion drag reducer systems to enhance the dissolution capacity of polymers. The hydrophilic surfactants may decrease the stability of W/O emulsion, which leads to deterioration of polymer emulsions in the storage and transport process instead. Herein, a pH-switchable surfactant, N-(2-morpholinoethyl) oleamide (NMEO) was designed for stabilizing a W/O emulsion drag reducer.
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