Investigation of synergy between nanoparticle and surfactant in stabilizing oil-in-water emulsions for improved heavy oil recovery

Pei, Haihua; Zhang, Guicai; Ge, Jijiang; Zhang, Jian; Zhang, Qiang

doi:10.1016/j.colsurfa.2015.08.025

Cited by 73 publications

(31 citation statements)

References 26 publications

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“…For an O/W emulsion system, the coalescence of droplets caused a separation of the excess phase due to the density difference between water and oil. The emulsion stability was determined by the measurement of the residual emulsion volumes (Pei et al, ). In the present system, the emulsion at r of 3:2 exhibits the optimal stability (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface

Jia

Han

et al. 2019

J Surfact & Detergents

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In our previous report, the mixed cationic/anionic surfactant system consisting of N‐dodecyl‐N‐methylpyrrolidinium bromide (L12) and sodium dodecyl sulfate (SDS) showed good interfacial tension (IFT) reduction of water/model oil (Vtoluene:V n‐decane = 1:1). In the present study, the effects of divalent salts (MgCl2 or CaCl2) on the interfacial activity were systematically evaluated. The additional Mg2+ ions greatly reduced the IFT to an ultralow value, whereas Ca2+ ions caused the generation of the precipitates and resulted in increased IFT values. The precipitates disappeared in binary divalent salt solutions, and the IFT values remained at a low level. Based on the valence, polarizability, and hydrated radius of the ions, we proposed a model to explain the abnormal changes. The effects of NaCl and temperature were investigated to further verify our proposed mechanism. Moreover, the additional divalent salts obviously enhanced the stability of L12/SDS stabilized emulsions.

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Section: Resultsmentioning

confidence: 99%

Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface

Jia

Han

et al. 2019

J Surfact & Detergents

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“…Pei et al investigated the synergetic effect of SiO 2 nanoparticle and CTAB for o/ w emulsions applications. Phase behavior testing, rheology evaluation, and microvisualization studies showed that nano-surfactant-stabilized emulsion demonstrated a high bulk viscosity and desirable mobility for recovering heavy oil [50]. Kumar et al synthesized a Pickering emulsion stabilized by SiO 2 nanoparticle and sodium dodecylbenzene sulfonate (SDBS) surfactant.…”

Section: Foam and Emulsion Stabilitymentioning

confidence: 99%

Nanotechnology Application in Chemical Enhanced Oil Recovery: Current Opinion and Recent Advances

Gbadamosi¹,

Junin²,

Manan³

et al. 2019

Enhanced Oil Recovery Processes - New Technologies

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Chemical enhanced oil recovery (EOR) has been adjudged as an efficient oil recovery technique to recover bypassed oil and residual oil trapped in the reservoir. This EOR method relies on the injection of chemicals to boost oil recovery. Recently, due to the limitations of the application of chemical EOR methods to reservoirs having elevated temperatures and high salinity and hardness concentrations, nanotechnology have been applied to enhance its efficiency and improve oil productivity. The synergistic combination of nanoparticles and conventional EOR chemicals has opened new routes for the synthesis and application of novel materials with sterling and fascinating properties. In this chapter, an up-to-date synopsis of nanotechnology applications in chemical EOR is discussed. A detailed explanation of the mechanism and applications of these novel methods for oil recovery are appraised and analyzed. Finally, experimental and laboratory results were outlined. This overview presents extensive information about new frontiers in chemical EOR applications for sustainable energy production.

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“…These emulsions exhibited potential for improved conformance and mobility control through the possible plugging of high permeability thief zones. Pei et al (2015) showed an increase in emulsion stability and residual heavy oil recovery effectiveness through the addition of nanoparticles to previously surfactant-stabilized emulsions. In this study of the synergistic effects of using both surfactants and nanoparticles to stabilize oil-in-water emulsions, micromodel tests were conducted that indicated more desirable mobility due to increases in emulsion viscosity resulting from the addition of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle-Stabilized Natural Gas Liquid-in-Water Emulsions for Residual Oil Recovery

et al. 2016

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Interest in silica nanoparticle-stabilized emulsions, especially those employing low-cost natural gas liquids (NGLs), has increased due to recent developments suggesting their use leads to improved conformance control and increased sweep efficiencies. When compared to conventional emulsionstabilizing materials such as surfactants, nanoparticles are an inexpensive and robust alternative, offering stability over a wider range of temperature and salinity, while reducing environmental impact.Oil-in-water emulsions with an aqueous nanoparticle phase and either a pentane or butane oil phase at a 1:1 volume ratio were generated at varying salinities for the observations of several emulsion characteristics. The effects of salinity on the stability of silica nanoparticle dispersions and NGL emulsions were observed. Increasing the salinity of the aqueous nanoparticle phase resulted in an increase in effective nanoparticle size due to increased nanoparticle aggregation. Rheology tests and estimates of emulsion droplet sizes were performed. Shear-thinning behavior was observed for all emulsions. Furthermore, overall emulsion viscosity increased with salinity. Nanoparticle-stabilized liquid butane-inwater emulsions were also generated with varying brine concentrations; however, no rheology or droplet size measurements were made due to the volatility of these emulsions.Residual oil recovery coreflood experiments were conducted (using Boise Sandstone cores) with nanoparticle-stabilized pentane-in-water emulsions as injectant and light mineral oil as residual oil. A recovery of up to 82% residual oil was observed for these experiments. By continuously measuring the pressure drop across the core, a possible mechanism for enhanced oil recovery is proposed. Pentane emulsion coreflood tests indicated that at a slower injection rate, residual oil recovery increases. This contrasts viscous emulsion corefloods (mineral oil or Texaco white oil as the emulsion oil phase), where increasing the injection rate increases the residual oil recovery.

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Investigation of synergy between nanoparticle and surfactant in stabilizing oil-in-water emulsions for improved heavy oil recovery

Cited by 73 publications

References 26 publications

Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface

Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface

Nanotechnology Application in Chemical Enhanced Oil Recovery: Current Opinion and Recent Advances

Nanoparticle-Stabilized Natural Gas Liquid-in-Water Emulsions for Residual Oil Recovery

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