....%) revealed that the foam strength was not dependent on surfactant concentration for the nonionic surfactant. However, the strength of foams stabilized by the anionic surfactant were sensitive to surfactant concentration, where the higher concentration generated a stronger foam. PET/CT images acquired during...

... surfactant reduction gemini surfactant tap water gel enhanced recovery hydraulic fracturing ve system micelle ve fluid elevated temperature chain length surfactant concentration friction reduction gpt gs-1 anionic surfactant introduction Since the advent of hydraulic fracturing...

... surfactants produced 41-53% of OOIP and an AOS anionic surfactant produced 39% of OOIP in a month. These experiments demonstrated that a combination of low water salinity and surfactants can make the originally oil-wet dolomite rocks more water-wet and improve oil recovery by imbibition at a low temperature...

... carbon dioxide-in-water foam/emulsion with fine texture can be generated using TTFA nanoparticles in porous media in conjunction with a non-ionic surfactant or an anionic surfactant in dilute concentrations. Foam flow experiments in a Berea core showed that TTFA nanoparticles even in low concentrations...

.... Coreflood experiments were conducted using two different rock-fluids systems: (1) Berea sandstone, condensate, synthetic brine and nitrogen; and (2) Parker sandstone, artificial retrograde gas, and synthetic brine at elevated pressures. The anionic surfactant, which was more effective in our previous work...

... live oils at reservoir conditions to determine in-situ reservoir wettability. Anionic surfactant altered the weakly water-wet behavior of live oil to strongly oil-wet (165°). It was also able to alter the strong oil-wet behavior of stocktank oil to less oil-wet (<135°). The nonionic surfactant...

... the relevant measurements. The aqueous solutions include alkaline solutions and AS solutions at different alkali, cationic and anionic surfactant concentrations. It has been found that the measured IFT varies with time. This dynamic IFT phenomenon is then interpreted in terms of the surfactant generation...