期刊
FUEL
卷 316, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2022.123360
关键词
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资金
- NSF MRI-RAPID [1053590]
- CSM Hydrate Consortium
- NSFC [51991365, 51706248]
- CNPC [ZD2019-184-002]
The plugging mechanism of water-continuous hydrate systems was extensively analyzed, and hydrate deposition and sloughing were observed to be the main cause of plugging.
Oil-water-gas co-transport often occurs in offshore oil/gas production, in which gas hydrate formation could lead to severe flow assurance issues and subsequent safety and environmental risks. As the offshore oil/gas fields mature, water production increases and the flow conditions may convert from an oil-continuous to a water-continuous system. To understand the hydrate plugging mechanism of water-continuous hydrate systems, the flow characteristics of methane hydrate-water slurries was experimentally investigated by using a high pressure vertical loop. The slurry viscosity of different hydrate fractions was measured using an in-line viscometer. Accumulation, deposition and sloughing of the hydrate particles were investigated by video imaging and viscosity measurement. The plugging mech-anism in a water-continuous hydrate system was extensively analyzed and hydrate deposition and sloughing were observed. The density difference and agglom-eration of hydrate particles is considered as the major cause of hydrate accumulation and deposition, which subsequently instigates plugging in water-continuous systems.
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