Rheology of THF hydrate slurries at high pressure
| Autor: | Paulo H. de Lima Silva, Paulo R. de Souza Mendes, Leandro Valim, Adriana Teixeira, Mônica F. Naccache |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology lcsh:Chemical technology lcsh:HD9502-9502.5 chemistry.chemical_compound 020401 chemical engineering Rheology Natural gas lcsh:TP1-1185 0204 chemical engineering Elasticity (economics) Tetrahydrofuran business.industry Drilling 021001 nanoscience & nanotechnology lcsh:Energy industries. Energy policy. Fuel trade Fuel Technology Chemical engineering chemistry Agglomerate Slurry 0210 nano-technology business Hydrate |
| Zdroj: | Oil & Gas Science and Technology, Vol 75, p 16 (2020) |
| ISSN: | 1953-8189 1294-4475 |
| DOI: | 10.2516/ogst/2020007 |
| Popis: | One of the main issues in the area of drilling and production in deep and ultra-deep water in the oil industry is the formation of natural gas hydrates. Hydrates are crystalline structures resembling ice, which are usually formed in conditions of high pressure and low temperature. Once these structures are formed, they can grow and agglomerate, forming plugs that can eventually completely or partially block the production lines, causing huge financial losses. To predict flow behavior of these fluids inside the production lines, it is necessary to understand their mechanical behavior. This work analyzes the rheological behavior of hydrates slurries formed by a mixture of water and Tetrahydrofuran (THF) under high pressure and low temperature conditions, close to the ones found in deep water oil exploration. The THF hydrates form similar structures as the hydrates originally formed in the water-in-oil emulsions in the presence of natural gas, at extreme conditions of high pressure and low temperature. The experiments revealed some important issues that need to be taken into account in the rheological measurements. The results obtained show that the hydrate slurry viscosity increases with pressure. Oscillatory tests showed that elasticity and yield stress also increase with pressure. |
| Databáze: | OpenAIRE |
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