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Energies 2017, 10(8), 1105; https://doi.org/10.3390/en10081105

Effects of Combined Sorbitan Monolaurate Anti-Agglomerants on Viscosity of Water-in-Oil Emulsion and Natural Gas Hydrate Slurry

1
National Engineering Laboratory for Pipeline Safety, MOE Key Laboratory of Petroleum Engineering, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum Beijing, 18 Fuxue Road, Changping District, Beijing 102249, China
2
State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing, Fuxue Road, Changping District, Beijing 102249, China
3
PetroChina Oil & Gas Pipeline Control Center, Beijing 100007, China
*
Authors to whom correspondence should be addressed.
Received: 9 May 2017 / Revised: 7 July 2017 / Accepted: 24 July 2017 / Published: 27 July 2017
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Abstract

Hydrate plugging is the major challenge in the flow assurance of deep-sea pipelines. For water-in-oil emulsions, this risk could be significantly reduced with the addition of anti-agglomerants (AAs). Hydrates often form from water-in-oil emulsions and the measurement of emulsion and slurry viscosity constitutes the basis for the application of hydrate slurry flow technology. In this work, using a novel high-pressure viscometer, emulsion and slurry viscosity with different AAs for water content ranging from 5% to 30% was obtained. The viscosity-temperature curves of emulsions were determined and correlated. The variation of system viscosity during hydrate formation from water-in-oil emulsions was examined, the sensitivity of stable slurry viscosity to water cut and the effects of temperature on annealed slurry viscosity were investigated. The results indicated that the variation of viscosity during hydrate formation relies on the conversion ratio. It also implied that the sensitivity of slurry viscosity to change in its water cut or temperature was reduced with AA addition. View Full-Text
Keywords: water-in-oil emulsion; viscosity; natural gas hydrate; slurry; anti-agglomerant water-in-oil emulsion; viscosity; natural gas hydrate; slurry; anti-agglomerant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lv, Y.; Guan, Y.; Guo, S.; Ma, Q.; Gong, J.; Chen, G.; Sun, C.; Guo, K.; Yang, L.; Shi, B.; Qin, W.; Qiao, Y. Effects of Combined Sorbitan Monolaurate Anti-Agglomerants on Viscosity of Water-in-Oil Emulsion and Natural Gas Hydrate Slurry. Energies 2017, 10, 1105.

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