Study on stability of produced water in ASP flooding based on critical micellar theory

Zhang, Dawei; Chen, Zhongxi; Ren, Lu; Meng, Xiangchun; Gu, Wenge

doi:10.1007/s00289-020-03497-6

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…As shown in Fig. (5), pressure field distribution of the e-separation process is further quantitatively described, and then the characteristic of pressure drop is drawn. The pressure drop changes of the free-water separation process with different water content are similar, and the average increase of pressure drop is 4.80%, respectively, when the water content increases from 55% to 85%.…”

Section: Pressure Field Distribution and Pressure Drop Characteristicsmentioning

confidence: 99%

“…With the intensive exploitation of oilfields, a variety of measures such as water flooding and chemical agents have been widely used, thus crude oil production and economic benefits have been guaranteed [1][2][3]. Subsequently, the prevalence of impurities such as water, sediment, and polymers are commonly present in the produced water from oil wells, respectively, the transportation and utilization of crude oil are affected and threats to the environment may increase [4][5]. Furthermore, the oil-water interfacial stability is affected by components such as polymer and asphaltene in produced water, which brings new challenges to the treatment of produced water [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, the prevalence of impurities such as water, sediment, and polymers are commonly present in the produced water from oil wells, respectively, the transportation and utilization of crude oil are affected and threats to the environment may increase [4][5]. Furthermore, the oil-water interfacial stability is affected by components such as polymer and asphaltene in produced water, which brings new challenges to the treatment of produced water [5][6][7]. Typically, water and crude oil mixture need to be separated and treated in the oilfield to achieve compliance with refining and commercial requirements [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation on Flow-Field Characteristics towards Removal of Free-Water by A Separator with Coalescing Plates

Zhang

Sun³

et al. 2023

J. Adv. App. Comput. Math.

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The produced water-containing polymer brings new challenges to oil-water separation in oilfield production, yet separators with coalescing plates to remove free water have been playing an active role. In this paper, the flow-field characteristics of polymer-laden produced water in a separator with coalescing plates are analyzed using computerized mathematical methods to investigate the effects with a water content of 55%, 70%, and 85%, flow rate of 3500 m3/d, 4800 m3/d, and 6000 m3/d, and duration time of 20 min, 40 min, and 60 min on flow-field properties and separating efficiency are studied. The results show that the separating efficiency is positively correlated with water content and duration time, and duration time has the greatest improvement to the separating efficiency, but the enhancement of flow rate may reduce the separating efficiency. It is also observed that the separation efficiency of free-water reached 70.9% and the water content at the oil outlet of the separator reached 20.4% at a duration time of 60 min, when the contained polymer concentration and water content in the oil-water mixture are 500 mg/L and 70%, respectively.

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Section: Pressure Field Distribution and Pressure Drop Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation on Flow-Field Characteristics towards Removal of Free-Water by A Separator with Coalescing Plates

Zhang

Sun³

et al. 2023

J. Adv. App. Comput. Math.

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“…Future work is necessary to confirm the exact mechanism of o/w separation in the presence of TiO 2 nanoparticles, proposed here, by measuring the contact angle. ASP-produced water contains a large amount of inorganic salts, which shield the electrostatic repulsion between the surfactant ion head groups [47]. After the surfactant is removed from the oil and water interface, it goes to the water phase and various techniques are being used to remove the surfactant from the separated water phase [48].…”

Section: De-stabilization Of Emulsionmentioning

confidence: 99%

De-Emulsification and Gravity Separation of Micro-Emulsion Produced with Enhanced Oil Recovery Chemicals Flooding

Khan

Ullah

et al. 2021

Energies

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The present study investigates the effect of TiO2 nanoparticles on the stability of Enhanced Oil Recovery (EOR)-produced stable emulsion. The chemical precipitation method is used to synthesize TiO2 nanoparticles, and their properties were determined using various analytical characterization techniques such as X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), and Field Emission Scanning Electron Microscopy (FESEM). The effect of TiO2 nanoparticles is evaluated by measuring oil/water (o/w) separation, rag layer formation, oil droplet size, and zeta potential of the residual EOR produced emulsion. The laser scattering technique is used to determine the o/w separation. The results showed that spherical-shaped anatase phase TiO2 nanoparticles were produced with an average particle size of 122 nm. The TiO2 nanoparticles had a positive effect on o/w separation and the clarity of the separated water. The separated aqueous phases’ clarity is 75% and 45% with and without TiO2 nanoparticles, respectively. Laser scattering analysis revealed enhanced light transmission in the presence of TiO2 nanoparticles, suggesting higher o/w separation of the ASP-produced emulsion. The overall increase in the o/w separation was recorded to be 19% in the presence of TiO2 nanoparticles, indicating a decrease in the stability of ASP-produced emulsion. This decrease in the stability can be attributed to the improved coalescence’ action between the adjacent oil droplets and improved behavior of o/w interfacial film. An observable difference was found between the oil droplet size before and after the addition of TiO2 nanoparticles, where the oil droplet size increased from 3 µm to 35 µm. A similar trend of zeta potential is also noticed in the presence of TiO2 nanoparticles. Zeta potential was −13 mV to −7 mV, which is in the unstable emulsion range. Overall, the o/w separation is enhanced by introducing TiO2 nanoparticles into ASP-produced stable emulsion.

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A novel cationic-modified chitosan flocculant efficiently treats alkali‒surfactant‒polymer flooding-produced water

et al. 2023

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Study on stability of produced water in ASP flooding based on critical micellar theory

Cited by 8 publications

References 20 publications

Numerical Investigation on Flow-Field Characteristics towards Removal of Free-Water by A Separator with Coalescing Plates

Numerical Investigation on Flow-Field Characteristics towards Removal of Free-Water by A Separator with Coalescing Plates

De-Emulsification and Gravity Separation of Micro-Emulsion Produced with Enhanced Oil Recovery Chemicals Flooding

A novel cationic-modified chitosan flocculant efficiently treats alkali‒surfactant‒polymer flooding-produced water

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