... of steam foam technology. In steam foam applications, steam (plus a non-condensing gas) is injected simulateneously with a surfactant solution. Under the favorable injection conditions a foam is formed inside the reservoir leading to significant reduction of steam mobility and can eventually improve sweep...

... compatibility, microemulsion phase behavior, and the interfacial tension (IFT) between oil and surfactant solutions in high salinity brine and at 90˚C. Comprehensive performance of the surfactants was evaluated, including adsorption of the surfactants onto the carbonate rocks and the long-term stability at 95˚C...

... carbon (TOC) analyzer. The contact angle of oil droplet on surface of carbonate core was measured in surfactant solution. The oil production via spontaneous imbibition of water in carbonate core was obtained using Amott cell. An imbibition simulation model was validated by the experimental results using...

.... concentration stability surfactant solution Upstream Oil & Gas internal olefin sulfonate surfactant alkyl benzene sulfonate surfactant concentration enhanced recovery Chemical Stability deionized water molecule sulfonate chemical flooding methods alkyl glyceryl ether sulfonate sulfate high...

.... enhanced recovery chemical flooding methods Upstream Oil & Gas oil water interfacial tension viscosity polymer associative polymer guan-109 reservoir differential pressure surfactant solution binary system interfacial tension resistance surfactant reservoir permeability concentration...

.... enhanced recovery trigger velocity experiment experimental result chemical flooding methods Upstream Oil & Gas Kam surfactant solution gas injection method porous medium pressure gradient superficial velocity surfactant concentration fluid dynamics Foam Generation propagation pressure...

... wettability alteration nonionic surfactant enhanced recovery adsorption mechanism surfactant solution formulation Upstream Oil & Gas concentration imbibition reservoir brine Oil Recovery surfactant formulation PPM surfactant anionic surfactant Introduction More than 60...

... for a better reservoir performance. mobility reduction factor stability Upstream Oil & Gas experiment surfactant surfactant solution steam foam test porous media chemical flooding methods MRF application Injection Rate enhanced recovery steam quality complex reservoir Foam Generation...

....). In our approach, a combination of an anionic surfactant (alkyl ether sulfonate, C17EO7S(C17EO7) and a nonionic surfactant (alkyl ether, iC13EO10) were used to formulate clear and stable surfactant solutions at reservoir conditions. Formulation and optimization of a LTWF at a very low total surfactant...

... Abstract This paper presents a novel foam-assisted surfactant Chemical Enhanced Oil Recovery (CEOR) of the matrix oil in naturally fractured reservoirs. Foam reduces fluid mobility within fractures and diverts the injected surfactant solution into matrix for wettability alteration and IFT...

... strategies were studied including co-injection of super-critical CO 2 and surfactant solution, and alternating injection of super-critical CO 2 and surfactant solution in different ratios, and then compared to find out the optimum injection strategy. Results from the study exhibit a significant increase...

... with a continuous liquid phase (containing the surfactant) wetting the rock whereas a part or all of the gas is made discontinuous by thin liquid films called lamellae ( Falls et al., 1988 ; Hirasaki, 1989 ). Thus, the foam is made by adding a surfactant solution to a gas injection. There are two main methods...

... effective volume of surfactant needed for optimum foam generation and hence oil recovery in a porous medium. The effect of reservoir pressure and surfactant concentration is studied. Carbon dioxide and surfactant solution were co-injected into Berea sandstone core that was saturated with brine and oil...

... of polymer solutions in a broad range of reservoir conditions (temperature & salinity) without any injectivity limitations even when considering very viscous surfactant solutions (i.e. up to 1000 cps) and low permeability cores. Average first normal stress difference measurements have been used...

... sandstone cores by co-injecting gas and surfactant solution at fixed foam quality. It was stabilized using two surfactants, namely C 14-16 alpha olefin sulfonate (AOS) and mixtures of AOS and a polymeric fluorocarbon (FC) esther. Effects of surfactant concentration, injection direction, surfactant pre...