【摘 要】
：
In oil and gas field,the application of kinetic hydrate inhibitors (KHIs) independently has remained problematic in high subcooling and high water-cut situation
【机 构】
：
Key Laboratory of Enhanced Heat Transfer and Energy Conversation,State Key Laboratory of Offshore Oi
论文部分内容阅读
In oil and gas field,the application of kinetic hydrate inhibitors (KHIs) independently has remained problematic in high subcooling and high water-cut situation.One feasible method to resolve this problem is the combined use of KHIs and some synergists,which would enhance KHIs' inhibitory effect on both hydrate nucleation and hydrate crystal growth.In this study,a novel kind of KHI copolymer poly(N-vinyl-2-pyrrolidone-co-2-vinyl pyridine)s (HGs) is used in conjunction with TBAB to show its high performance on hydrate inhibition.The performance of HGs with different monomer ratios in structure Ⅱ tetrahydrofuran (THF) hydrate is investigated using kinetic hydrate inhibitor evaluation apparatus by step-cooling method and isothermal cooling method.With the combined gas hydrate inhibitor at the concentration of 1.0 wt％,the induction time of 19 wt％ THF solution could be prolonged to 8.5 h at a high subcooling of 6 ℃.Finally,the mechanism of HGs inhibiting the formation of gas hydrate is proposed.
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