The behavior of interfacial film thinning in oil-in-water emulsion from the produced water from ASP flooding

Ma, Zekun; Ge, Fuxiang; Wang, Qingqing; Li, Xiao Bing

doi:10.1080/01496395.2018.1561715

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…For AA/AM/AOS/C 16 ‐DMAAC solution, the water‐evolution rate of the emulsion formed between AA/AM/AOS/C 16 ‐DMAAC and crude oil was only 17.2% at 2 h, reached 88.8% after further 9 h of storage. The emulsion capacity of AA/AM/AOS/C 16 ‐DMAAC solution was relatively stable, indicating that AA/AM/AOS/C 16 ‐DMAAC had better emulsification properties than HPAM, which was attributed to the introduction of surfactant chain (AOS) in AA/AM/AOS/C 16 ‐DMAAC, which enhanced the interfacial film strength of the oil–water emulsion and thus improved the stability of the emulsion 47 …”

Section: Resultsmentioning

confidence: 99%

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Qin,

Xie,

Tang

et al. 2024

SPE Polymers

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A novel quaternary copolymer of AA/AM/AOS/C16‐DMAAC was synthesized with acrylic acid (AA), acrylamide (AM), sodium α‐alkenyl‐sulfonate (AOS), and dimethyl‐hexadecyl‐allyl‐ammonium chloride (C16‐DMAAC), using ammonium persulfate and sodium bisulfate (NH4)2S2O8‐NaHSO3) as initiators. The structure of AA/AM/AOS/C16‐DMAAC was characterized using Fourier transform infrared spectroscopy and nuclear magnetic resonance hydrogen spectroscopy. It can be found that the thickening capacity, shearing resistance, temperature‐resistance, salt‐resistance, and emulsification properties of AA/AM/AOS/C16‐DMAAC were superior to those of most widely and cost‐effective partially hydrolyzed polyacrylamide (HPAM) solution at the same concentration. Specifically, the viscosity retention rate of AA/AM/AOS/C16‐DMAAC (3000 mg/L) solution was 86%, which was better than that of HPAM solution (52%) after 30 s of mechanical shearing at 28000 r/min. In addition, the enhanced oil recovery of AA/AM/AOS/C16‐DMAAC solution was 16% at 65 °C, which was about 1.5 times higher than that of HPAM solution (11%). Significantly, successful synthesis of zwitterionic quaternary copolymer emphasizes the importance of a systematic approach to designing appropriate copolymers for enhanced oil recovery.Highlights A novel zwitterionic quaternary copolymer of AA/AM/AOS/C16‐DMAAC was successfully synthesized. The performance on thickening capacity, shearing resistance, temperature‐resistance, salt‐resistance, and emulsification properties of AA/AM/AOS/C16‐DMAAC was superior to that of the most widely used partially hydrolyzed polyacrylamide (HPAM). The enhanced oil recovery of AA/AM/AOS/C16‐DMAAC (16%) was about 1.5 times higher than that of HPAM (11%).

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Section: Resultsmentioning

confidence: 99%

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Qin,

Xie,

Tang

et al. 2024

SPE Polymers

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Section: Methodsmentioning

confidence: 99%

“…A high-speed CCD camera system (i-SPEED 3, OLYMPUS, Japan) was used to monitor the thinning and rupture behavior of the oil/water interface film. , This system combines high-speed dynamic microscopy with the single-drop method to accurately and easily map the effect of oil-displacing agent composition on the interfacial film thinning behavior. The size of the oil droplets can seriously affect the interfacial film strength; hence, the size of the oil droplets in this experiment was strictly controlled.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Images of the oil droplets were obtained from Image-Pro plus 7.0 and i-SPEED Control software (in the Supporting Information, see Figure S5). The thinning rate u (mm/s) and rupture rate constant k (s –1 ) of the interfacial film were determined using the following equations , where N and N 0 represent the number of ruptured oil droplets and total number ( N 0 = 60 in this research) of droplets in t (survival time of single oil droplet, s), respectively; t 1/2 (s) is the half-life of the oil droplet; t D (s) is the drainage time of the demulsified liquid; Δ R is the radius reduction ratio of the oil droplet before and after the interfacial film rupturing; Δ t is the duration time of the interfacial film rupturing process; R (mm) is the radius of the oil droplet; and t (s) is the time from the droplet appeared at the oil/water interface to complete break-up. Combination of these parameters could be employed to evaluate the interfacial film strength.…”

Section: Materials and Methodsmentioning

confidence: 99%

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Effect of Oil-Displacing Agent Composition on Oil/Water Interface Stability of the Asphaltene-Rich ASP Flooding-Produced Water

Liu

Sun

et al. 2022

Langmuir

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In this work, the effect of oil-displacing agent composition on oil/water interface stability of the asphaltene-rich alkali–surfactant–polymer (ASP) flooding-produced water was systematically investigated, especially from the perspective of the interaction between oil displacement agents and asphaltene at the oil/water interface. Primarily, adsorption behavior of the artificial and natural interfacial substances (oil displacement surfactant and asphaltenes) on the oil/water interface was investigated by molecular dynamics simulation. The oil displacement surfactant and asphaltenes formed a cross-linked and compact interfacial film structure, which significantly enhanced the interface stability; the more the oil displacement surfactants adsorbed on the interface, the more stable is the cross-linked structure formed between them and asphaltenes. Then, the interfacial property variations that are originating from the interactions differences between oil displacement agents and asphaltenes were monitored via interfacial tension, zeta potential, and interfacial film rheology tests. Moreover, the effect of oil displacement agent concentrations on the interfacial film thinning and rupture kinetic behavior was further investigated. Finally, cream experiments were conducted to verify the effect of oil displacement agent composition on the oil/water separation efficiencies of asphaltene-rich ASP flooding-produced water. When 5% asphaltenes was added, the creaming oil removal rate reduced from 90.0 to 85.3% at 19 h. The interactions between asphaltenes and oil displacement agents immensely enhance the oil/water interfacial film strength and impede the oil/water separation process.

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“…Surfactants are used in different branches of science and technology. ey are used as catalysts [5][6][7] in bioremediation of toxic metals [8,9], hydroformylation reaction [10], and enhanced oil recovery (EOR) [11][12][13][14]. EOR involves multidisciplinary collaboration of researchers in physics, chemistry, and reservoir engineering.…”

Section: Introductionmentioning

confidence: 99%

Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence

Sun

Guo

et al. 2020

Journal of Chemistry

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Alkali-surfactant-polymer (ASP) flooding is very promising chemical enhanced oil recovery (EOR) technology which can make an incremental oil recovery factor (IORF) of 30% original oil in place (OOIP). How to choose alkali in ASP flooding remains a question for a long time. As the world’s only and largest ASP flooding application place, Daqing Oilfield has always adhered to the strategy of parallel development of strong alkali ASP flooding (SASP) and weak alkali ASP flooding (WASP), but SASP is in a dominant position, indicated by more investments and more project numbers. This leaves an impression that SASP is better than WASP. However, WASP is drawing more interest than SASP recently. Moreover, as the ASP flooding in Daqing went from field tests to commercial applications since 2014, how to comprehensively consider the benefit and cost of ASP flooding has become a new focus at low oil prices. This paper compares two typical large-scale field tests (B-1-D SASP and B-2-X WASP) completed in Daqing Oilfield and analyzes and discusses the causes of this difference. The injection viscosity and interfacial tension (IFT) for the two field test areas are substantially equivalent under the conditions of Daqing Oilfield, and WASP is better than SASP when reservoir geological conditions are considered. WASP exhibits the same IORF of 30% as SASP while having a much better economic performance. For the SASP field test, the injected strong alkali NaOH makes the test behave unlike a typical strong ASP flooding due to the presence of CO2 in the formation fluid, which well explains why IORF is much higher than all the other SASPs but scaling is less severe than others. This paper confirms that under Daqing Oilfield reservoir conditions, it is the alkali difference that caused the performance difference of these two tests, although some minor uncertainties exist. WASP is better than the SASP providing the same conditions . In addition, the detailed information of the two ASP field tests provided can give reference for the implementation of ASP flooding in other oilfields. After all, the study of ASP flooding enhanced oil recovery technology under low oil prices requires great foresight and determination.

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The behavior of interfacial film thinning in oil-in-water emulsion from the produced water from ASP flooding

Cited by 8 publications

References 16 publications

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Synthesis and performance evaluation of a novel zwitterionic quaternary copolymer for enhanced oil‐recovery application

Effect of Oil-Displacing Agent Composition on Oil/Water Interface Stability of the Asphaltene-Rich ASP Flooding-Produced Water

Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence

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