... as a function of temperature (70 – 300°F) and surfactant concentration. The length of surfactant alkyl chain was varied to investigate the impact of surfactant chain length on VES fluid viscosity at elevated temperatures. The effect of flow rate on friction reduction capability of the surfactant fluid...

... that equal surfactant partitioning on concentration basis is advantageous to foam transport ( Zeng et al. 2016 ). They highlighted, through their 1D simulations of CO 2 -foam displacing water, that low surfactant partitioning in CO 2 results in early gas breakthrough, high surfactant concentration...

... that the recovery of oil in lower permeability significantly improved when applying a cationic surfactant compared to a non-ionic surfactant. Standnes and Austad (2003) showed that when the cationic surfactant concentration is lower than the critical micelle concentration (CMC), no wettability alteration process...

... surfactant enhanced recovery concentration aqueous phase upstream oil & gas sandpack sa species retention adsorption ltp flooding partition coefficient flood brine oleic phase surfactant concentration polymer solution sa concentration oil recovery Introduction Chemical enhanced...

... injection salinity phase behavior salinity composition path entrapment surfactant concentration concentration pope viscosity model enhanced recovery pvt measurement adsorption two-phase lobe & john equation of state microemulsion phase flow in porous media fluid dynamics microemulsion...

... was calculated using Eq.(1) : (1) θ A   =   0 .112   ∗   ( ϕ i   −   ϕ f )   ∗   V S u r f   ∗   ρ S u r f w r o c k where θ A is the adsorption in mg of soultion/gr-rock, ϕi is the initial surfactant concentration in gpt, ϕf...

... cumulative oil recovery surfactant concentration Oil Recovery nanofluid enhanced oil recovery reservoir society of petroleum engineers interfacial tension permeability Y. Yuan et al. (2013) reviewed contact angle measurement (basic and advanced) techniques for wettability determination...

... Dynamics simulator permeability model flow in porous media concentration discontinuity saturation society of petroleum engineers relative permeability model surfactant concentration relative permeability profile reservoir simulation Delshad new model microemulsion three-phase microemulsion...

... with high confidence. flow in porous media transition experiment gas injection method regime liquid velocity Foam Generation surfactant solution chemical flooding methods Upstream Oil & Gas viscosity gas fraction foam quality hysteresis permeability surfactant concentration...

... retention makes ASP flooding in the Sabriyah Mauddud reservoir viable. Upstream Oil & Gas viscosity reservoir core formulation chemical flooding methods concentration residual oil saturation surfactant retention coreflood salinity solubilization ratio surfactant concentration Oil...

... and flow regimes. Multitude of steady state and unsteady state laboratory experiments of foam floods in a vertical column of sandpack with and without oil at different surfactant concentrations and at varied gas-surfactant solution injection rates are designed, conducted and analyzed. The logic and basis...

... recovery concentration synthetic surfactant surfactant chemical flooding methods microemulsion phase solubilization ratio Mohammadi Upstream Oil & Gas prediction mole fraction salinity limit experimental data surfactant concentration equation fish diagram oil concentration Soap...

... surfactant slug surfactant microemulsion Brine enhanced recovery phase transition Phase Behavior solubilization ratio surfactant concentration society of petroleum engineers Upstream Oil & Gas transition salinity gradient design salinity gradient composition seawater total surfactant...

... gradient Fluid Dynamics surfactant concentration Oil Recovery capillary number foam superficial velocity experiment fraction enhanced oil recovery Comparison to Other Studies Several recent studies report recovery of waterflood residual oil by foam ( Haugen et al., 2012 ; Andrianov et al...

... Abstract We review challenges to accurate simulation of foam enhanced oil recovery, with a focus on numerical issues. Foam responds in an abrupt, nonlinear way to changes in water saturation, surfactant concentration, and oil saturation, in ways that cause fluxes to fluctuate in time and space...

... in interfacial tension and static adsorption density with changes in solution conditions. These molecules showed excellent aqueous stability even in high salinity and hard brines. Ultra-low IFT values were measured at low surfactant concentrations. The synthesized Gemini surfactants also showed lower maximum...

... alteration chemical flooding methods fluid dynamics relative permeability symposium fracture permeability surfactant concentration oil recovery reservoir Introduction Carbonate reservoirs hold approximately 60% of the world's oil reserves ( Akbar et al , 2000 ). A large number of carbonate...

... calculations. production control reservoir surveillance regime chemical flooding methods production logging spe student paper liquid flow rate experiment production monitoring upstream oil & gas fa-406 surfactant solution gas velocity flow regime surfactant concentration surfactant...

.... However, for the later situation, it could be improved by changing pH of surfactant solution. (6) For a given surfactant, oil recovery can be maximized by identifying the optimal surfactant concentration, brine salinity, sodium metaborate concentration, and divalent cation content. Upstream Oil...

... , surfactant concentration change inside the core is obtained from Eq. 9 . (5) τ w = σ k m λ w m / f λ o m / f λ T [ ( P c w o m − P c w o f ) + σ z σ ( γ w − γ o ) g c g ( h w f − h w m...