CO2 influence on asphaltene precipitation
| Autor: | Gustavo R. Borges, Arley A. Cruz, Monique Amaral, Cláudio Dariva, Julio Palácio, André M. Palma, João A. P. Coutinho, Elton Franceschi, Denisson Santos |
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| Rok vydání: | 2019 |
| Předmět: |
Petroleum production
Work (thermodynamics) General Chemical Engineering Flow assurance Mineralogy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics chemistry.chemical_compound 020401 chemical engineering chemistry Carbon dioxide High carbon dioxide Asphaltene precipitation Environmental science Precipitation 0204 chemical engineering Physical and Theoretical Chemistry 0210 nano-technology Asphaltene |
| Zdroj: | The Journal of Supercritical Fluids. 143:24-31 |
| ISSN: | 0896-8446 |
| DOI: | 10.1016/j.supflu.2018.08.005 |
| Popis: | The energy industry has registered a considerable growth of petroleum production from reservoirs located in deep and ultra-deepwater, mainly in Brazil. The Brazilian Pre-Salt fields, specifically, have shown high carbon dioxide content which favors the precipitation of organic particles such as asphaltenes. This scenario has turned flow assurance into a major technical and economic challenge for the exploitation of those fields. In this work a variable-volume cell equipped with a near-infrared probe was used to study the onset of asphaltene precipitation induced by carbon dioxide, evaluating the effects of pressure, temperature, asphaltene concentration, and system composition. Furthermore, the Cubic Plus Association (CPA) was applied to model the asphaltene precipitation. The results show that temperature and the oil model system composition were the parameters that most influenced the asphaltene stability, and that the CPA adequately described the asphaltene precipitation. |
| Databáze: | OpenAIRE |
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