Optimized hydrophobic magnetic nanoparticles stabilized pickering emulsion for enhanced oil recovery in complex porous media of reservoir

With an extensive application of flooding technologies in oil recovery, traditional emulsion has seen many limits due to its poor stability and easy demulsification. Pursuing a new robust plays fundamental role developing highly effective technology. In this work, novel Pickering with special magnetic nanoparticles Fe 3 O 4 @PDA@Si was designed prepared. To disclose the mechanism from nanoparticles, physico-chemical characterization systematically examined. Meanwhile, property constructed evaluated on basis certain downhole conditions. The results showed that synthesis found have hydrophobic core-shell structure diameter 30 nm. emulsions based at oil-to-water ratio 5:5, 50°C, water separation rate only 6% droplet approximately 15 μm ultra-depth-of-field microscope image. This demonstrates excellent improves problem We further discussed displacement enhanced recovery effect type emulsion. microscopic experiment demonstrated profile control played more important than emulsification denudation, system increasing by 10.18% micro model. Core experiments established incremental increases decreasing core permeability, 12.36% 17.39% as permeability drops 834.86 219.34 × 10 −3 2 . stabilized offers option for (EOR).