| Project/Area Number |
19K15490
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 31020:Earth resource engineering, Energy sciences-related
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| Research Institution | Kyushu University |
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Principal Investigator |
Nguele Ronald 九州大学, 工学研究院, 助教 (50821401)
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| Project Period (FY) |
2019-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | CO2-EOR / Asphaltene / Nanofluid / Poly vinyl alcohol / Asphaltene deposition / Nanoparticle / Poly Vinyl Alcohol / Nanoparticles |
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| Outline of Research at the Start |
One of the major challenges of crude oil production using carbon dioxide (CO2) injection is the deposition of heavy fractions. These fractions consisting of asphaltenes, wax and/or resins, precipitate when the oil is expelled from underground.This research aims at alleviating the precipitation in asphaltenes by treating the crude oil with modified poly-vinyl alcohol (mPVA) and stabilized nanofluids (NF). mPVA and NF are expected to scavenge asphaltenes, which are in suspension in the crude oil.
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| Outline of Final Research Achievements |
It was found that asphaltenes, extracted from dead crude oils develop a stronger affinity with the silica nanofluid film leading to a preferential adsorption. Also, the research showed that the adsorption is proportional with the aromatic core, and inversely proportional to heteroatom contents. It was further highlighted that asphaltene solubility is rather dependent of the size of the aromatic core and the amount of embedded heteroatoms.
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| Academic Significance and Societal Importance of the Research Achievements |
the present research proposed a hybrid production scheme in which the nanofluid should be injected ahead of the carbon dioxide. This approach promotes the adsorption the polar asphaltenes onto the surface of the nanoparticles allowing thereby oil dissolution by CO2.
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