... materials proppant viscosity concentration gs-1 application 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...

... 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...

... Table 2 Surfactants used in the study Label Type Molecular Weight C1 cationic surfactant 364.4 gm/mol C2 cationic surfactant 308.3 gm/mol N1 non-ionic surfactant 652 gm/mol N2 non-ionic surfactant N/A A1 anionic surfactant 312.4 gm/mol P1 non-ionic...

.... 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...

... 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 and adsorption at the interface and its...