Spontaneous Emulsification via Once Bottom-Up Cycle for the Crude Oil in Low-Permeability Reservoirs
| Autor: | Jirui Hou, Baojun Bai, Hairong Wu, Zhe Li, Yao Lu, Haishun Feng, Meng Yang, Jiatong Jiang, Wanli Kang, Derong Xu |
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| Rok vydání: | 2018 |
| Předmět: |
Coalescence (physics)
chemistry.chemical_classification Materials science General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Alkali metal 01 natural sciences 0104 chemical sciences Surface tension Fuel Technology chemistry Chemical engineering Rheology Pulmonary surfactant Emulsion 0210 nano-technology Porous medium Alkyl |
| Zdroj: | Energy & Fuels. 32:3119-3126 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.7b03720 |
| Popis: | The formulation and mechanism of a hybrid ultralow interfacial tension spontaneous emulsification (SE) system consisting of alkyl polyglucoside surfactant and low-concentration alkali were investigated to enhance oil recovery for low-permeability reservoirs. Multiple-light scattering was used to characterize the stability and demulsification process of oil-in-water (O/W) emulsions. The emulsions were evaluated in terms of droplet size distribution, ζ potential, and three-phase rheological property. The average droplet size of the optimum SE O/W emulsion is about 0.2 μm, which is smaller than the average diameter of the low-permeability throats (0.2–4.0 μm). The coalescence and floatation of emulsion droplets are well-deferred. The oscillation–shear–oscillation rheological property could be further improved with the presence of the optimum system. This can be attributed to the synergistic effect of surfactants and alkali, which enables the formation of a more tight arrangement film of surfactants at the oi... |
| Databáze: | OpenAIRE |
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