2015
DOI: 10.3997/2214-4609.201412115
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Systematic Phase Behaviour Study and Foam Stability Analysis for Optimal Alkaline/Surfactant/Foam Enhanced Oil Recovery

Abstract: SUMMARYAlkaline-Surfactant-Foam (ASF) flooding is a recently introduced enhanced oil recovery (EOR) method. This paper presents laboratory study of this ASF to better understand its mechanisms. The focus is on the interaction of ASF chemical agents with oil and in the presence and absence of naphthenic component and in-situ soap generation. The impact of alkali, IFT reduction, in-situ soap generation and oil acid number were systematically studied by measurement of phase behaviour, interfacial tension and foam… Show more

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Cited by 8 publications
(2 citation statements)
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“…Foam-assisted chemical flooding (FACF) combines the injection of a surfactant slug, for mobilizing residual oil, with foam generation for drive mobility control, thus obtaining favorable sweep efficiency. ,, In a well-designed FACF, the surfactant slug provides an ultralow o/w IFT and adequately low slug mobility, mobilizing previously trapped residual oil and thus leading to the development of an oil bank. Surfactant slug mobility, which is a function of its viscosity and relative permeability, is relevant as it controls the part of the reservoir being contacted by the slug, determining the amount of oil that can potentially be mobilized from the reservoir.…”
Section: Introductionmentioning
confidence: 99%
“…Foam-assisted chemical flooding (FACF) combines the injection of a surfactant slug, for mobilizing residual oil, with foam generation for drive mobility control, thus obtaining favorable sweep efficiency. ,, In a well-designed FACF, the surfactant slug provides an ultralow o/w IFT and adequately low slug mobility, mobilizing previously trapped residual oil and thus leading to the development of an oil bank. Surfactant slug mobility, which is a function of its viscosity and relative permeability, is relevant as it controls the part of the reservoir being contacted by the slug, determining the amount of oil that can potentially be mobilized from the reservoir.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, we have studied the EOR method of alkaline/surfactant/foam (ASF) flooding. ASF is based on the injection of an AS slug for the mobilization of residual oil followed by the generation of a drive foam (F) for mobility control. ,,, Although the alkali might generate natural surfactants from the crude oil’s naphthenic acids through a saponification process, in terms of practical aspects, the addition of alkali to the formulation may lead to internal corrosion of metal-based surface facilities (e.g., pipelines) because of the formation of carbonic acid. , The latter was our drive to come up with a chemical EOR methodology equivalent to ASF without the addition of alkali to the surfactant slug: Foam-assisted chemical flooding (FACF). Similar to ASF, FACF implies the injection of a surfactant slug at residual oil to waterflood for oil mobilization followed by the injection of a foam drive for mobility control.…”
Section: Introductionmentioning
confidence: 99%