Effect of salinity on the IFT between aqueous surfactant solution and crude oil

Kedar, Vaibhav; Bhagwat, Sunil S.

doi:10.1080/10916466.2018.1447953

Cited by 36 publications

(31 citation statements)

References 15 publications

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“…The results showed that microwave radiation had a significant effect on demulsification performance. Kedar et al [12] investigated the influence of salts, several demulsifiers, and the dynamic interfacial tension (DIFT) of the interfacial film between water and crude oil. The result showed that salts more effectively reduced the interfacial film tension, accelerating the demulsifier molecule migration towards the interface film and enhancing the chemical recovery of crude oil.…”

Section: Introductionmentioning

confidence: 99%

Separation Emulsion via Non-Ionic Surfactant: An Optimization

2019

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Achieving emulsion stability in the petroleum industry is a major challenge due to several problems encountered in the oil refining process, such as corrosion in equipment, high-pressure drops in pipelines, and catalyst poisoning in upstream facilities. Thus, several methods are applied for emulsion treatment and chemical treatment using surface-active agents, a fundamental method in the petroleum industry. The present work investigated the performance of a non-ionic surfactant in separating water in a crude oil emulsion via the bottle test technique. Then, a Fractional Factorial Design (2 K−1 ) was used to characterise the effect of significant variables. In particular, a Pareto chart was employed and factors such as demulsifier dosage, toluene concentration, pressure, sitting time, and temperature were investigated. Accordingly, the parameters applied were further analysed using a Central Composite Design (CCD) based on the Response Surface Method (RSM). The experimental results based on analysis of Variance (ANOVA) show that demulsifier dosage, temperature, and sedimentation times were the main variables affecting the dehydration process, with the highest F-values being 564.74, 94.53 and 78.65 respectively. The increase in the surfactant dosage before critical concentration, temperature and sitting time leads to boosting dehydration efficiency. In addition, a mathematical model was established for the variables, with a coefficient of determination value of 0.9688. Finally, numerical optimisation was performed on the variables and the results show that the optimal values are 1000 ppm, 15.5 mL, −400 mmHg, 120 min, and 90 • C, for demulsifier dosage, toluene concentration, pressure, sitting time, and temperature, respectively.

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Section: Introductionmentioning

confidence: 99%

Separation Emulsion via Non-Ionic Surfactant: An Optimization

2019

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“…The tubes were shaken for 24 hours at high-temperature, giving enough time for the surfactant to partition from the aqueous phase into the oil phase and reach equilibrium. The aqueous solution was then transferred for analysis [8,20]. Oil and surfactant aqueous solution are two immiscible liquids, the ratio between their equilibrium concentrations is given by the partitioning or distribution coefficient k p , and it can be measured according to Equation (2).…”

Section: Surfactant Partitioning Testmentioning

confidence: 99%

“…Chemical flooding was found to be among the most efficient Enhanced Oil Recovery (EOR) methods [6,7]. Surfactants are special classes of molecules which have a hydrophobic tail and hydrophilic head group, and the most stable condition for these molecules is at the oil-water interface [8][9][10]. Surfactants have a great potential in EOR applications and are used to enhance the recovery process efficiently by increasing the quantity of the residual oil extracted after the secondary recovery process, which can account for approximately 60% of the original oil in place [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…In surfactant-based water/oil systems, the ratio between the surfactant concentration in the oil phase and in the water phase under equilibrium conditions is known as the partitioning coefficient K p . The partitioning of surfactants between the two phases has crucial effects on the surfactant flooding process; as well as determining the partitioning coefficient required to offer a better understanding of the partitioning mechanism [8,19,20].…”

Section: Introductionmentioning

confidence: 99%

“…Different methods to determine the surfactant concentration in water and oil at equilibrium conditions were applied depending on the investigated regime. Numerous studies discussed the partitioning in the pre-cmc regime [8,19,20,27,29], as well as in the post-cmc regime [20,[30][31][32][33]. In the pre-cmc regime, a proposed method determining the portioning coefficient of surfactants was developed.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Surfactant Partitioning in Pre-CMC and Post-CMC Regimes for Enhanced Oil Recovery Application

et al. 2019

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The applications of surfactants in Enhanced Oil Recovery (EOR) have received more attention in the past decade due to their ability to enhance microscopic sweep efficiency by reducing oil-water interfacial tension in order to mobilize trapped oil. Surfactants can partition in both water and oil systems depending on their solubility in both phases. The partitioning coefficient (Kp) is a key parameter when it comes to describing the ratio between the concentration of the surfactant in the oil phase and the water phase at equilibrium. In this paper, surfactant partitioning of the nonionic surfactant Alkylpolyglucoside (APG) was investigated in pre-critical micelle concentration (CMC) and post-cmc regimes at 80 °C to 106 °C. The Kp was then obtained by measuring the surfactant concentration after equilibration with oil in pre-cmc and post-cmc regimes, which was done using surface tension measurements and high-performance liquid chromatography (HPLC), respectively. Surface tension (ST) and interfacial tension (IFT) behaviors were investigated by performing pendant and spinning drop tests, respectively—both tests were conducted at high temperatures. From this study, it was found that APG was able to lower IFT as well as ST between water/oil and air/oil, and its effect was found to be more profound at high temperature. The partitioning test results for APG in pre-cmc and post-cmc regimes were found to be dependent on the surfactant concentration and temperature. The partitioning coefficient is directly proportional to IFT, where at high partitioning intensity, IFT was found to be very low and vice versa at low partitioning intensity. The effect of temperature on the partitioning in pre-cmc and post-cmc regimes had the same impact, where at a high temperature, additional partitioned surfactant molecules arise at the water-oil interface as the association of molecules becomes easier.

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Surface functionalized Fe₃O₄‐polyacrylamide dispersion for improved oil recovery at harsh conditions

Haruna

Wen

2023

J of Applied Polymer Sci

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With the growing demand for energy supply and the natural decline of oil reservoirs, the development of new enhanced oil recovery (EOR) techniques become more and more critical. Polymer flooding EOR is one of the most successful chemical EOR methods but suffers many drawbacks at high temperatures and high salinity (HT‐HS) conditions. Superparamagnetic nanoparticles (NPs) have been recently investigated for subsurface applications, including in EOR, due to their unique physicochemical properties. Their applicability under harsh reservoir conditions, however, is yet to be examined. In this work, a novel approach is developed to synthesize superparamagnetic Fe3O4 (NPs) with unique surface functionalization (SMag‐NPs) and to form stable polyacrylamide (PAM) dispersions (SMag‐NPs‐PAM). Both stability and core flooding experiment results demonstrate the promising future of the new dispersion. The SMag‐NPs‐PAM dispersion is not only stable at HT‐HS conditions, but also show excellent EOR capability at HT‐HS by recovering, 61.72% of the initial oil quantity, which is significantly higher than those from conventinal NPs‐PAM disperison and pure PAM fluid. These findings show the promising application potential of SMag‐NPs‐PAM for improving oil recovery in challenging HT‐HS reservoir conditions.

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Effect of salinity on the IFT between aqueous surfactant solution and crude oil

Cited by 36 publications

References 15 publications

Separation Emulsion via Non-Ionic Surfactant: An Optimization

Separation Emulsion via Non-Ionic Surfactant: An Optimization

Experimental Investigation of Surfactant Partitioning in Pre-CMC and Post-CMC Regimes for Enhanced Oil Recovery Application

Surface functionalized Fe₃O₄‐polyacrylamide dispersion for improved oil recovery at harsh conditions

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Effect of salinity on the IFT between aqueous surfactant solution and crude oil

Cited by 36 publications

References 15 publications

Separation Emulsion via Non-Ionic Surfactant: An Optimization

Separation Emulsion via Non-Ionic Surfactant: An Optimization

Experimental Investigation of Surfactant Partitioning in Pre-CMC and Post-CMC Regimes for Enhanced Oil Recovery Application

Surface functionalized Fe3O4‐polyacrylamide dispersion for improved oil recovery at harsh conditions

Contact Info

Product

Resources

About

Surface functionalized Fe₃O₄‐polyacrylamide dispersion for improved oil recovery at harsh conditions