... upstream oil & gas water saturation surfactant injection surfactant solution surfactant imbibition brine imbibition surfactant injection fluid dynamics experiment core piece matrix oil recovery Introduction Producing oil from tight formations at economical rates became possible...

... Abstract Recovery in low permeability oil reservoirs is challenging because they are often high fractured and oil-wet. Microemulsion-forming surfactant solutions, which can replace oil from tight matrix by imbibition, have been verified as effective enhanced oil recovery fluids for tight...

... & gas high permeability streak injection profile sag cycle chemical flooding methods conformance improvement gas injection method concentration co 2 surfactant solution foam formulation surfactant slug breakthrough time mobility foam baseline co 2 Introduction A CO 2 foam field...

... % OOIP by the end of December 2018. The oil sand was prepared by mixing oil and sand at a mass ratio of 35: 140, and aged for 7 days at the reservoir temperature. After that, 5g aged oil sand was immersed in 50g surfactant solution for 48 hours at the reservoir temperature. The crude oil...

... injection. chemical flooding methods Graue surfactant Upstream Oil & Gas cationic surfactant solution 2 enhanced recovery co 2 surfactant solution waterflooding experiment wettability alteration Foam Generation Oil Recovery crude oil foam injection fracture saturation surfactant...

... recovery compared to water flooding in oil-wet fractured systems due to the selective diversion of ultralow-IFT foam. This effect resulted in crossflow near foam front, with surfactant solution (or weak foam) primarily diverted from the fracture into the matrix before the foam front, and oil/high-salinity...

... and natural sandstone cores, foam generated by injecting N 2 and HSF-X surfactant solution was able reduce steam mobility between 40 to 100 times at 100°C and 10 to 15 times at 200°C more compared to steam mobility in the absence of the foam. Finally oil recovery experiments at 200°C using silica sand cores...

... solubility surfactant solution high temperature emulsion foam Novel Surfactant apparent viscosity society of petroleum engineers enhanced recovery Brine sandpack surfactant Chen porous media reservoir Introduction CO 2 enhanced-oil-recovery (EOR) is an effective method for improving...

... in the cell by surfactant solution. The ability to recover oil from an oil-wet dolomite core was confirmed by an Amott imbibition cell experiment in which 50% recovery was observed for a core initially fully saturated with oil. The formulation's ability to generate strong foam in porous media was presented...

... changed wettability of oil-wet shale to preferentially water-wet in both high and low salinity brines. Seven single surfactants and five surfactant blends were tested for imbibition. Surfactant solutions improved water imbibition to the extent of 20% PV. Surfactant blends improved imbibition more than...

... is required for project design to further understand the connection between laboratory and field scale displacement mechanisms. Foam is frequently generated in a reservoir through the injection of alternating slugs of surfactant solution and gas (SAG). To reduce costs and increase the success of in-situ...

... recovery above 56% OOIP as compared to 20-25% OOIP for brine alone. The imbibition oil recovery results indicate that although the ultimate oil recovery by brine alone is significant, the early oil production is significantly slower than by surfactant solutions. Upscaling the laboratory time to the field...

... of foam generation through a variety of experimental evidence. We perform coreflood experiments involving simultaneous injection of gas and surfactant solution at field-like velocities into a model consolidated porous medium made of sintered glass. The core has a well-characterized, sharp permeability...

... et al., 2002 ; Shen et al., 2006 , Telmadarreie and Trivedi, 2015 ) to the surfactant solution, in order to reduce the liquid films drainage, to limit gas diffusion through liquid lamellae and reinforce the stability against de-foaming effect of oil droplets. Experimental studies of foam...

... Abstract This paper presents a dynamic wettability alteration model based on the Gibbs adsorption isotherm equation. The model is conceptually and thermodynamically developed for ideal surfactant solutions ( i.e anionic surfactants) that reduce the surface tension between oil phase and rock...

..., the surfactants could continuously lift-up and mobilize adsorbed oil to increase recoverable oil in place. enhanced recovery steam-assisted gravity drainage oil production operation surfactant solution thermal method complex reservoir stimulation KCL solution surfactant reservoir SAGD chemistry...

... imbibition experiment surfactant surfactant solution permeability duplicate experiment formulation Oil Recovery Introduction and Background Naturally fractured oil reservoirs contain a significant fraction of the world's oil resources, but the recovery from these reservoirs is typically very...

... the conclusions and ensure repeatability of results. enhanced recovery Christiansen Upstream Oil & Gas transition zone MPZ oil surfactant solution characterization viscosity oil saturation hydrocarbon component reservoir aromatic ring Compound oil sample saturation molecule paleo oil...

... DV2 contains ethoxylate (EO) groups and a linear alkyl chain. The two surfactants will be respectively denoted as DV1 and DV2 in the remainder of the paper. All surfactant solutions are prepared at 0.5 wt. % in 40 g/L NaCl brine. We first evaluate bulk foaming properties of these surfactants with air...

... concentration surfactant wettability alteration chemical flooding methods surfactant formulation experiment hard brine enhanced recovery Brine imbibition EDTA formulation Oil Recovery Upstream Oil & Gas napa surfactant solution reservoir agent anionic surfactant dissolution carbonate...