Immiscible fluid displacement in a porous media: Effect of surfactants introduced ab initio versus surfactants formed in-situ

Soori, Tejaswi; White, Andrew R.; Ward, Thomas

doi:10.1016/j.petrol.2019.05.050

Cited by 9 publications

(4 citation statements)

References 43 publications

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“…The flow characteristics of discontinuous emulsion droplets are different from those of single‐phase systems and oil–water mixtures 4 . Due to complex rheological properties, dispersed emulsion droplets can deform and recover their original shape while flowing in pores and throats, 5 chemical agents can change the interface wettability of rock, 6 and chemical reactions can occur between chemical agents and crude oil 7 . The fluid flow process involves the complex coupling of the physical field, stress field, and chemical field in chemical flooding 8 .…”

Section: Introductionmentioning

confidence: 99%

“…4 Due to complex rheological properties, dispersed emulsion droplets can deform and recover their original shape while flowing in pores and throats, 5 chemical agents can change the interface wettability of rock, 6 and chemical reactions can occur between chemical agents and crude oil. 7 The fluid flow process involves the complex coupling of the physical field, stress field, and chemical field in chemical flooding. 8 It is a typical flow process of the multiflow mode for discontinuous multiphase fluids under multifield action.…”

Section: Introductionmentioning

confidence: 99%

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A review of crude oil emulsification and multiphase flows in chemical flooding

Yazhou

Yin

et al. 2022

Energy Science & Engineering

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Chemical flooding has become an important method to enhance oil recovery in high‐water cut reservoirs. Crude oil emulsification often occurs during chemical flooding, and it plays a very positive role in increasing crude oil production. Crude oil emulsification increases the complexity of fluid flow in the reservoir including multifield coupling characteristics and multiphase flow and multiphase form characteristics. This paper discusses advanced research techniques and the status of multiphase fluid flows in chemical flooding, including the interfacial rheological properties of emulsions, physical simulation of emulsion seepage, and mathematical models and numerical simulations of seepage. Studies on the mechanism of seepage have analyzed the macroscopic and microscopic aspects of seepage during chemical flooding. Prospective directions for future research are indicated including the study of the interfacial rheological characteristics of emulsions, methods for the evaluation of the seepage characteristics of chemical flooding, and mathematical models of multiphase seepage during chemical flooding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A review of crude oil emulsification and multiphase flows in chemical flooding

Yazhou

Yin

et al. 2022

Energy Science & Engineering

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“…Low-permeability oil reservoirs are playing an important role in fulfilling the energy demands of the world, especially in China. − Due to the unique characteristics of low-permeability oil reservoirs, including low porosity, low seepage capacity, high heterogeneity, and strong sensitivity, the oil recovery from such reservoirs is rather low. − During the development of such reservoirs by conventional water flooding, under the effects of high specific surface area, large thickness of the boundary layer, adverse wettability, and high capillary resistance, there exists a great flow resistance in pores and pore throats, which leads to an increase of the displacement pressure gradient and pressure loss. − Besides, due to the aforementioned physical properties of these reservoirs, the injection pressure rises quickly. In long-term water flooding, the injection pressure will exceed the formation fracture pressure and then cause damage to the reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Molecular Deposition Filming Flooding in a Low-Permeability Oil Reservoir

et al. 2020

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Molecular deposition (MD) filming flooding has proved to be an effective enhanced oil recovery (EOR) method in reservoirs where recovery was relatively difficult. The B425 block with a low permeability in Shengli Oilfield, China, has reaped the benefits of MD filming flooding. However, the main EOR mechanisms and the influencing factors in this block are still not clear. In this work, laboratory experiments were conducted under various conditions to investigate the EOR mechanisms of MD filming flooding and its potential use in enhancing the recovery of low-permeability reservoirs. Spontaneous imbibition, micromodel displacement, and oil–water relative permeability experiments were also performed. The results indicate that a MD filming flooding agent (MDFFA) with lower molecular weight can more effectively reduce the interfacial tension (IFT) and perform better in wettability alteration. The improvement of seepage capacity is obviously increased when the molecular weight of the MDFFA is less than 1000 g/mol. The low molecular weight MDFFA has a better effect on the spontaneous imbibition in a capillary with a larger diameter, and increasing the concentration can enhance this process. Lower injection rate and lower injection concentration are beneficial to reduce the injection pressure and improve oil recovery. The smaller the permeability of cores, the greater the relative permeability difference between water flooding and MD filming flooding. In addition, lower core permeability is more conductive to the EOR mechanisms of MD filming flooding in the low-permeability oil reservoirs.

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“…2020, 10, x FOR PEER REVIEW 3 of 21 (2) The effect of porous structure is neglected and immiscible displacement flow in a single passage is considered. The "single passage" simplification is made referring to the research works on pure displacement process [22][23][24][25][26][27][28], in which the essential feature of the displacement process could be reflected. The "immiscible displacement" simplification comes from the fact that as a candidate of the cryogenic fracturing fluid, liquid nitrogen (LN2) is hardly soluble in water.…”

Section: Introductionmentioning

confidence: 99%

A Novel 2D Model for Freezing Phase Change Simulation during Cryogenic Fracturing Considering Nucleation Characteristics

Huang

Wang

2020

Applied Sciences

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A 2D computational fluid dynamics (CFD) model in consideration of nucleation characteristics (homogeneous/heterogeneous nucleation) using the volume of fluid (VOF) method and Lee model was proposed. The model was used to predict the process of a multiphase flow accompanied by freezing phase change during cryogenic fracturing. In this model, nucleation characteristic (homogeneous and heterogeneous nucleation) during the freezing process and the influence of the formed ice phase on the flowing behavior was considered. Validation of the model was done by comparing its simulation results to Neumann solutions for classical Stefan problem. The comparison results show that the numerical results are well consistent with the theoretical solution. The maximum relative differences are less than 7%. The process of multiphase flow accompanied by the freezing of water was then simulated with the proposed model. Furthermore, the transient formation and growth of ice as well as the evolution of temperature distribution in the computational domain was studied. Results show that the proposed method can better consider the difference between homogeneous nucleation in the fluid domain and heterogeneous nucleation on the wall boundary. Finally, the main influence factors such as the flow velocity and initial distribution of ice phase on the fracturing process were discussed. It indicates that the method enable to simulate the growth of ice on the wall and its effect on the flow of multiphase fluid.

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Immiscible fluid displacement in a porous media: Effect of surfactants introduced ab initio versus surfactants formed in-situ

Cited by 9 publications

References 43 publications

A review of crude oil emulsification and multiphase flows in chemical flooding

A review of crude oil emulsification and multiphase flows in chemical flooding

Experimental Investigation of Molecular Deposition Filming Flooding in a Low-Permeability Oil Reservoir

A Novel 2D Model for Freezing Phase Change Simulation during Cryogenic Fracturing Considering Nucleation Characteristics

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