Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates
Gas hydrate blockage in pipelines during offshore production becomes a major problem with increasing water depth. In this work, a series of experiments on gas hydrate formation in a flow loop was performed with low flow rates of 0.33, 0.66, and 0.88 m/s; the effects of the initial subcooling, flow r...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/14017 2023-05-15T17:11:48+02:00 Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates Tang, Cuiping Zhao, Xiangyong Li, Dongliang He, Yong Shen, Xiaodong Liang, Deqing 2017 http://ir.giec.ac.cn/handle/344007/14017 https://doi.org/10.3390/en10010145 英语 eng MDPI AG ENERGIES http://ir.giec.ac.cn/handle/344007/14017 doi:10.3390/en10010145 Natural Gas Hydrate Flow Assurance Slurry Sludge Flow Characteristics Science & Technology Technology Energy & Fuels WATER CUT SYSTEMS GAS HYDRATE ICE-SLURRY CRUDE-OIL INHIBITORS VISCOSITY EMULSION LOOP MODEL Article 期刊论文 2017 ftchacadsciegiec https://doi.org/10.3390/en10010145 2022-09-23T14:12:44Z Gas hydrate blockage in pipelines during offshore production becomes a major problem with increasing water depth. In this work, a series of experiments on gas hydrate formation in a flow loop was performed with low flow rates of 0.33, 0.66, and 0.88 m/s; the effects of the initial subcooling, flow rate, pressure, and morphology were investigated for methane hydrate formation in the flow loop. The results indicate that the differential pressure drop (Delta P) across two ends of the horizontal straight pipe increases with increasing hydrate concentration at the early stage of gas hydrate formation. When the flow rates of hydrate fluid are low, the higher the subcooling is, the faster the transition of the hydrates macrostructures. Gas hydrates can agglomerate, and sludge hydrates appear at subcoolings of 6.5 and 8.5 degrees C. The difference between the Delta P values at different flow rates is small, and there is no obvious influence of the flow rates on Delta P. Three hydrate macrostructures were observed: slurry-like, sludge-like, and their transition. When the initial pressure is 8.0 MPa, large methane hydrate blockages appear at the gas hydrate concentration of approximately 7%. Based on the gas-liquid two-phase flow model, a correlation between the gas hydrate concentration and the value of Delta P is also presented. These results can enrich the kinetic data of gas hydrate formation and agglomeration and provide guidance for oil and gas transportation in pipelines. Article in Journal/Newspaper Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Energies 10 1 145 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Natural Gas Hydrate Flow Assurance Slurry Sludge Flow Characteristics Science & Technology Technology Energy & Fuels WATER CUT SYSTEMS GAS HYDRATE ICE-SLURRY CRUDE-OIL INHIBITORS VISCOSITY EMULSION LOOP MODEL |
spellingShingle |
Natural Gas Hydrate Flow Assurance Slurry Sludge Flow Characteristics Science & Technology Technology Energy & Fuels WATER CUT SYSTEMS GAS HYDRATE ICE-SLURRY CRUDE-OIL INHIBITORS VISCOSITY EMULSION LOOP MODEL Tang, Cuiping Zhao, Xiangyong Li, Dongliang He, Yong Shen, Xiaodong Liang, Deqing Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates |
topic_facet |
Natural Gas Hydrate Flow Assurance Slurry Sludge Flow Characteristics Science & Technology Technology Energy & Fuels WATER CUT SYSTEMS GAS HYDRATE ICE-SLURRY CRUDE-OIL INHIBITORS VISCOSITY EMULSION LOOP MODEL |
description |
Gas hydrate blockage in pipelines during offshore production becomes a major problem with increasing water depth. In this work, a series of experiments on gas hydrate formation in a flow loop was performed with low flow rates of 0.33, 0.66, and 0.88 m/s; the effects of the initial subcooling, flow rate, pressure, and morphology were investigated for methane hydrate formation in the flow loop. The results indicate that the differential pressure drop (Delta P) across two ends of the horizontal straight pipe increases with increasing hydrate concentration at the early stage of gas hydrate formation. When the flow rates of hydrate fluid are low, the higher the subcooling is, the faster the transition of the hydrates macrostructures. Gas hydrates can agglomerate, and sludge hydrates appear at subcoolings of 6.5 and 8.5 degrees C. The difference between the Delta P values at different flow rates is small, and there is no obvious influence of the flow rates on Delta P. Three hydrate macrostructures were observed: slurry-like, sludge-like, and their transition. When the initial pressure is 8.0 MPa, large methane hydrate blockages appear at the gas hydrate concentration of approximately 7%. Based on the gas-liquid two-phase flow model, a correlation between the gas hydrate concentration and the value of Delta P is also presented. These results can enrich the kinetic data of gas hydrate formation and agglomeration and provide guidance for oil and gas transportation in pipelines. |
format |
Article in Journal/Newspaper |
author |
Tang, Cuiping Zhao, Xiangyong Li, Dongliang He, Yong Shen, Xiaodong Liang, Deqing |
author_facet |
Tang, Cuiping Zhao, Xiangyong Li, Dongliang He, Yong Shen, Xiaodong Liang, Deqing |
author_sort |
Tang, Cuiping |
title |
Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates |
title_short |
Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates |
title_full |
Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates |
title_fullStr |
Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates |
title_full_unstemmed |
Investigation of the Flow Characteristics of Methane Hydrate Slurries with Low Flow Rates |
title_sort |
investigation of the flow characteristics of methane hydrate slurries with low flow rates |
publisher |
MDPI AG |
publishDate |
2017 |
url |
http://ir.giec.ac.cn/handle/344007/14017 https://doi.org/10.3390/en10010145 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
ENERGIES http://ir.giec.ac.cn/handle/344007/14017 doi:10.3390/en10010145 |
op_doi |
https://doi.org/10.3390/en10010145 |
container_title |
Energies |
container_volume |
10 |
container_issue |
1 |
container_start_page |
145 |
_version_ |
1766068562315706368 |