Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery

Mahmoudi, Sajjad; Jafari, Arezou; Javadian, Soheila

doi:10.1007/s12182-019-00364-6

Cited by 50 publications

(26 citation statements)

References 42 publications

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“…This will subsequently promote collisions between particles, allowing them to fuse and form larger particles by van der Waals forces. 29 No significant effect toward the nanoparticles size when stored in either PBS or PCB media was shown in the results suggesting good stability-as supported by their zeta potential values (−22 to −25 mV).…”

Section: Resultsmentioning

confidence: 81%

“…The nanoparticles exhibited a slightly bigger diameter when stored at 25°C compared to 4°C perhaps because of increased kinetic energy of the particles as a result of increased temperature. This will subsequently promote collisions between particles, allowing them to fuse and form larger particles by van der Waals forces 29 . No significant effect toward the nanoparticles size when stored in either PBS or PCB media was shown in the results suggesting good stability—as supported by their zeta potential values (−22 to −25 mV).…”

Section: Resultsmentioning

confidence: 86%

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Investigations of amphiphilic butylglyceryl‐functionalized dextran nanoparticles for topical delivery

Bostanudin

Noor

Sahudin

et al. 2020

J of Applied Polymer Sci

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Toward the development of colloidal systems that can enhance transdermal permeation of hydrophilic actives, a material combining the non‐toxic of dextran with alkylglycerols permeation enhancing property has been designed. To this purpose, a range of amphiphilic butylglyceryl dextrans (DEX‐OX4) was synthesized via modification with n‐butylglycidyl ether with a degree of functionalization in the range 6.3%–35.7%. A reduced viscosity and an increased molecular weight of DEX‐OX4 were recorded when compared to the starting material. DEX‐OX4 was formulated into nanocarriers and loaded with α‐arbutin prior to characterization—the nanoparticles (180–220 nm size) were found to be close‐to‐spherical, stable at pH 5 and 7, with a loading capacity of 11.7%. Slower release of α‐arbutin from the nanoparticles was demonstrated when tested in acidic media. Lack of toxicity at application‐relevant concentrations and increased permeation were demonstrated by nanoparticles in vitro results against immortalized skin human keratinocytes cells (HaCaT).

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 86%

Investigations of amphiphilic butylglyceryl‐functionalized dextran nanoparticles for topical delivery

Bostanudin

Noor

Sahudin

et al. 2020

J of Applied Polymer Sci

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“…In general, incubation at 4 °C induced only a small variation in the diameter, with almost no noticeable change, as was observed when incubated in PCB (indicating good stability, as evidenced by their ζ potentials in Table 4 ), as opposed to that of PBS. A high temperature is capable of increasing the kinetic movements of nanoparticles, which will ultimately promote collisions between them, which would increase their possibility to form bigger aggregates by van der Waals forces [ 72 ].…”

Section: Resultsmentioning

confidence: 99%

Hydrophobically Grafted Pullulan Nanocarriers for Percutaneous Delivery: Preparation and Preliminary In Vitro Characterisation

2021

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Polymeric colloidal nanocarriers formulated from hydrophobically grafted carbohydrates have been the subject of intensive research due to their potential to increase the percutaneous penetration of hydrophilic actives. To this goal, a series of hydrophobically grafted pullulan (BMO-PUL) derivatives with varying degree of grafting (5–64%) was prepared through functionalisation with 2-(butoxymethyl)oxirane. The results demonstrated that monodispersed BMO-PUL nanocarriers (size range 125–185 nm) could be easily prepared via nanoprecipitation; they exhibit close-to-spherical morphology and adequate stability at physiologically relevant pH. The critical micellar concentration of BMO-PUL was found to be inversely proportional to their molecular weight (Mw) and degree of grafting (DG), with values of 60 mg/L and 40 mg/L for DG of 12.6% and 33.8%, respectively. The polymeric nanocarriers were loaded with the low Mw hydrophilic active α-arbutin (16% loading), and the release of this active was studied at varying pH values (5 and 7), with a slightly faster release observed in acidic conditions; the release profiles can be best described by a first-order kinetic model. In vitro investigations of BMO-PUL nanocarriers (concentration range 0.1–4 mg/mL) using immortalised skin human keratinocytes cells (HaCaT) evidenced their lack of toxicity, with more than 85% cell viability after 24 h. A four-fold enhance in arbutin permeation through HaCaT monolayers was recorded when the active was encapsulated within the BMO-PUL nanocarriers. Altogether, the results obtained from the in vitro studies highlighted the potential of BMO-PUL nanocarriers for percutaneous delivery applications, which would warrant further investigation in vivo.

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“…In addition, the high consumption of alkali for the heavy oil with low acid number, which will lead to saltsensitive effect and reduce the viscosity. Thus, due to the existence problems of severe scale formation and disposal of produced emulsions, surfactant-polymer (SP) flooding has gained more interests for enhancing oil recovery in recent years [45][46][47][48][49][50]. In fact, SP flooding pilots have been performed and proven to be efficient in many light oil reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir

Chen

et al. 2021

Geofluids

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Polymer flooding has a significant potential to enhance oil recovery in a light oil reservoir. However, for polymer flooding in a conventional heavy oil reservoir, due to unfavorable mobility ratio between water and oil, the improvement of sweep efficiency is limited, resulting in a low incremental oil recovery and failure to achieve high-efficiency development for polymer flooding in a conventional heavy oil reservoir. Inspired by the EOR mechanisms of the surfactant-polymer (SP) flooding process, the polymer-viscosity reducing surfactant flooding (P-VRSF) system was proposed to enhance conventional heavy oil recovery. Thus, to gain an insight into enhancing oil recovery by P-VRSF in a conventional heavy oil reservoir, the viscosity property, oil-water interfacial tension property, and oil viscosity reduction property were investigated. A series of parallel sand pack experiments were conducted to investigate enhanced oil recovery ability of polymer flooding and P-VRSF in a heterogeneous reservoir. Then, the 2D micromodel flooding experiments were conducted to investigate the EOR mechanism from porous media to pore level. Results demonstrated that polymer could increase the viscosity of injection water and improve the sweep efficiency. The emulsifying stability of surfactant with ultralow IFT (10-3 mN/m) was worse than that of the surfactant with higher IFT (10-2 mN/m). The viscosity reduction rate of the surfactant with higher IFT was higher than 80% at different oil-water volume ratios. The incremental oi recovery of P-VRSF was higher than that of polymer flooding. Moreover, the polymer-viscosity reducing surfactant with higher IFT could have higher incremental oil recovery. The 2D micromodel flooding results showed that the swept area of polymer flooding and P-VRSF was larger than that of water flooding. Moreover, the swept area of the surfactant with good emulsifying stability was larger than that of the surfactant with ultralow IFT. These findings could provide insights into enhancing oil recovery by P-VRSF in the conventional heavy oil reservoir.

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Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery

Cited by 50 publications

References 42 publications

Investigations of amphiphilic butylglyceryl‐functionalized dextran nanoparticles for topical delivery

Investigations of amphiphilic butylglyceryl‐functionalized dextran nanoparticles for topical delivery

Hydrophobically Grafted Pullulan Nanocarriers for Percutaneous Delivery: Preparation and Preliminary In Vitro Characterisation

Insights into Enhanced Oil Recovery by Polymer-Viscosity Reducing Surfactant Combination Flooding in Conventional Heavy Oil Reservoir

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