Emulsion flooding for enhanced oil recovery: Filtration model and numerical simulation

Demikhova, I.I.; Likhanova, Natalya V.; Perez, J.R. Hernandez; Falcon, Dennys A.Lopez; Olivares‐Xometl, Octavio; Berthier, Andres E. Moctezuma; Lijanova, Irina V.

doi:10.1016/j.petrol.2016.02.018

Cited by 46 publications

(14 citation statements)

References 26 publications

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“…According to Starvland et al (2006), the amount of this permeability reduction varies from zone to zones, with regard to the fluids saturations. Demikhova et al (2018) attributed this matter to retention of dispersed oleic droplets of O/W emulsions in the pore throat as a consequence of two mechanisms: (1) size exclusion and (2) droplets/pore walls interactions in porous media. Yu et al (2018) declared that permeability reduction of their sandpack models was a function of the volume of emulsion slug, oil and water fraction in emulsions, injection flow rate and the absolute permeability of the models.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on enhancing water flooding performance using oil-in-water emulsions in an Iranian oil reservoir

Sadati

Sahraei

2019

J Petrol Explor Prod Technol

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Emulsions are extensively prevalent in the oil industry in both advantageous and disadvantageous ways. In the literature, conventional water flooding in high permeability oil reservoirs has confronted with water channeling and poor sweep efficiency. In this paper, the remedial application of O/W emulsions as an EOR method in improving water performance is discussed. To this purpose, a series of flooding experiments were carried out in one of the Iranian oil reservoirs in reservoir condition of 75 C and 2000 psi. Then, visual stability measurements were conducted to inspect the stability characterization of the emulsion. Sodium dodecyl sulfate was applied helping simple dispersion of the gasoil into the water phase, and emulsions with water percentage of 90, 80, 70 and 60 were developed to introduce into the porous media. It was found out from flooding experiments that emulsion injection after conventional water flooding can lead to additional oil recovery (up to 20%). Besides, the emulsion with 80% water cut was determined as the optimum emulsion for injection in this reservoir considering financial aspects. Moreover, results of the stability test revealed that the aqueous phase with one wt% surfactant or higher had formed emulsions which have been stable during a long period of 6 months.

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Section: Introductionmentioning

confidence: 99%

An experimental investigation on enhancing water flooding performance using oil-in-water emulsions in an Iranian oil reservoir

Sadati

Sahraei

2019

J Petrol Explor Prod Technol

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“…Studies on elution of oil from the granular bed using the setup described above made it possible to track pressure changes at the inlet to the bed (Δp) 1) throughout the process. The results of these experiments for the four eluting liquids with varying content of the surfactant (0, 1, 2, and 3 %) are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…After application of the primary methods for oil recovery, i.e., a crude oil is spurted out of a petroleum reservoir by natural pressure of trapped liquid or gas, and the secondary methods, i.e., involving an injection of water into the reservoir, a substantial portion of this substance still remains in the bed. It is estimated that approximately 50 % of the initial amount of the oil in a reservoir remains in the bed in the form of a residual oil, after application of the standard recovery techniques [1,2]. These resources constitute a target for enhanced oil recovery (EOR) techniques.…”

Section: Introductionmentioning

confidence: 99%

Porous Bed Saturation Changes in Elution Process with Surfactant Solutions in Advanced Oil Recovery

2020

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The elution of high-viscosity substances from a granular bed using fluids with different interfacial tensions was investigated. Analyses of changes in flow resistance and the degree of saturation of the deposit during the process were conducted. The elution process was described by means of the modified concept of capillary bundles, based on the Blake-Kozeny-Carman relationship. The use of this dependence can be helpful in determining the degree of saturation of the deposit at any given time of elution process only on the basis of the flow hydrodynamics and parameters of the deposit and liquid. This makes it possible to estimate the residual saturation of the bed without the need to perform troublesome experimental research for the content of oil in the reservoir.

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“…Emulsification has been widely observed in a large number of laboratory and field tests. The higher oil recoveries of emulsion flooding in these cases indicate emulsification plays a positive role for further improving oil recoveries [11][12][13][14].…”

Section: Introductionmentioning

confidence: 93%

Effect of Emulsification on Enhanced Oil Recovery during Surfactant/Polymer Flooding in the Homogeneous and Heterogeneous Porous Media

Wang

Zhang²,

Yuan³

et al. 2021

Geofluids

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Surfactant polymer (SP) flooding has become an important enhanced oil recovery (EOR) technique for the high-water cut mature oilfield. Emulsification in the SP flooding process is regarded as a powerful mark for the successful application of SP flooding in the filed scale. People believe emulsification plays a positive role in EOR. This paper uses one-dimensional homogenous core flooding experiments and parallel core flooding experiments to examine the effect of emulsification on the oil recoveries in the SP flooding process. 0.3 pore volume (PV) of emulsions which are prepared using ultralow interface intension (IFT) SP solution and crude oil with stirring method was injected into core models to mimic the emulsification process in SP flooding, followed by 0.35 PV of SP flooding to flood emulsions and remaining oil. The other experiment was preformed 0.65 PV of SP flooding as a contrast. We found SP flooding can obviously enhance oil recovery factor by 25% after water flooding in both homogeneous and heterogeneous cores. Compared to SP flooding, emulsification can contribute an additional recovery factor of 3.8% in parallel core flooding experiments. But there is no difference on recoveries in homogenous core flooding experiments. It indicates that the role of emulsification during SP flooding will be more significant for oil recoveries in a heterogeneous reservoir rather than a homogeneous reservoir.

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Emulsion flooding for enhanced oil recovery: Filtration model and numerical simulation

Cited by 46 publications

References 26 publications

An experimental investigation on enhancing water flooding performance using oil-in-water emulsions in an Iranian oil reservoir

An experimental investigation on enhancing water flooding performance using oil-in-water emulsions in an Iranian oil reservoir

Porous Bed Saturation Changes in Elution Process with Surfactant Solutions in Advanced Oil Recovery

Effect of Emulsification on Enhanced Oil Recovery during Surfactant/Polymer Flooding in the Homogeneous and Heterogeneous Porous Media

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