... Abstract The formation and flow of emulsions during alkaline flooding process plays an important role for improving heavy oil recovery. In this study alkaline/surfactant (A/S) flood tests were performed in sandpacks to demonstrate the effectiveness of sweep efficiency improvement...

... foam could be enhanced by polymer or not, some investigators are convinced that the only effect of polymer addition is to lower oil saturations before and during foam generation and propagation; there is no chemical interactions between polymer, surfactant or thin liquid films. 16, 17...

... Abstract The role of natural surfactants in bitumen extraction from oil sands has been extensively researched, but these studies have focused primarily on surfactants that are soluble in the water phase. Recent work at CETC-Devon has shown strong correlations between bitumen weathering...

... Abstract In spite of their wide use in hydraulic fracturing and gravelpack operations, the complex flow behavior of surfactant-based fluids in straight tubing is least investigated. Accurate prediction of friction-pressure is essential for proper treatment design. Previous correlations from...

... Abstract Alkali-surfactant flooding is an established enhanced oil recovery technique in conventional oil reservoirs, whereby the injected chemical reduces the oil/water interfacial tension, leading to less trapping of oil ganglia. In the past, there have been some studies of alkali and alkali...

... economical one by effectively utilizing the natural reservoir energy. It has always been a challenging task to determine the surfactant usage due to its cost and continuous consumption during the dewatering process. In this paper, a method is developed and applied to optimize the surfactant usage in a gas...

.... Surfactants designed to reduce surface and interfacial tension are also a key element in the design of fluid systems to enhance recovery and reduce entrapment of fluid barriers within the formation. Enhanced fluid recovery improves overall completions economics due to less total treatment cost and less time...

... Abstract The difficulty of determining the effective interfacial tension (IFT) in porous media limits the modeling and prediction of surfactant flood performance. Surfactant dilution, adsorption and partitioning - occurring as the aqueous solution is injected into the reservoir...

... depletion test flow in porous media production control depletion test agent reservoir surveillance enhanced recovery heavy oil reservoir production monitoring foaminess surfactant oil production upstream oil & gas depletion rate pvt measurement PETROLEUM SOCIETY CANADIAN INSTITUTE...

... investigates the technical feasibility of applying a microemulsion flood to TFY reservoir. This study has two major components: First, is to optimize the concentration of surfactant, in order to obtain a lower interfacial tension between oil and microemulsion phases, and a high viscosity of the microemulsion...

... Abstract Ultra-low interfacial tension (IFT) between crude oil and brine is critical for successful enhanced oil recovery by alkaline/surfactant/polymer (ASP) flooding. With the right surfactant, this can be obtained at low and economic concentrations. However, maintaining low IFT during...

... of colloidal gas aphron based drilling fluids are investigated. The results of rheology, API filtration loss and density measurement testsusing various CGA based drilling fluid formulations are presented. The effects of polymer and surfactant concentration, surfactant type, shear rate, mixing time and water...

... Abstract ASP (alkali/surfactant/polymer) flooding has been successfully applied in several field pilots in Daqing oilfield in China. The oil recovery is improved by about 20% OOIP over recovery by water flooding. The interfacial tension (IFT) of ASP/crude oil is one of the most important...

... Abstract Surfactant adsorption on reservoir rocks or sands is one of the major factors that may significantly reduce the effectiveness of an alkaline/surfactant flooding for heavy oil recovery. It is difficult to determine the surfactant adsorption by measuring the difference in surfactant...

... samples where the imbibition took place upward and lateral directions, respectively. Water-air, brine-kerosene, brine-mineral oil and surfactant solution-mineral oil pairs were used as fluids. The rate of imbibition was evaluated for different matrix size, shapefactor, wetting/non-wetting phase types...

... Abstract Capillary (spontaneous) imbibition recovery in naturally fractured reservoirs can be enhanced by adding surfactant into injected water. Selection of proper surfactant type and concentration is essential in this process as the reduction in IFT by addition of surfactant does not always...

... Abstract SAGD is a very promising recovery process to produce heavy oils and bitumen resources. The method ensures both a stable displacement of steam and economical rates by using gravity as the driving force and a pair of horizontal wells for injection/production. Surfactant injection...

... Abstract Inorganic particles are a problem during oil/water separation of petroleum crude. The solids partially accumulate at the interface and may fill separation and storage tanks. In this paper anionic and nonionic surfactants are used to help remove the solids at the interface by water...

... Abstract Alkaline flood is a cost-effective enhanced oil recovery (EOR) process, particularly suitable for acidic oil reservoirs. After alkaline solution is injected into an oil reservoir, some surfactants can be generated in situ by the neutralization of the injected alkali with the organic...

... between HAP and surfactants have been well documented (2–5) . Addition of surfactants to polymer solutions can influence the microenviroment of both components. Surfactants associate with the polymer or form micelles, meanwhile the polymer chains tend to reconform to associate with the surfactant. It has...