联用型水合物抑制剂在油水体系内抑制机理初探

Insight into the Inhibition Mechanism of Combined Hydrate Inhibitor in Oil-water System

水合物堵塞造成的流动安全问题长期困扰着油气生产和运输部门。采用高压蓝宝石反应釜和在线激光粒度测定装置,研究了动力学抑制剂与水合物阻聚剂联用时在油水体系内对水合物的抑制性能。实验结果表明,与单独加入水合物阻聚剂体系相比,动力学抑制剂的加入可有效抑制水合物的成核,延长水合物形成的诱导时间;但联用后导致油水乳化程度变差,并在水合物形成初始阶段易发生颗粒间的相互聚积。最后,通过二者在油水界面上的竞争吸附作用初步分析了联用型水合物抑制剂在油水体系内的抑制机理。

Gas hydrates play a significant role in the flow assurance of oil and gas flowlines,posing one of the most serious problems relative to the formation and deposition of other solids. The inhibition performance of combined hydrate inhibitor that anti-agglomerant is combined with kinetic hydrate inhibitor,was experimentally studied using a high pressure sapphire cell and an online particle size measurement device. The experimental results showed that,compared with the system that only anti-agglomerant was added,the addition of kinetic hydrate inhibitor can effectively prolong the induction time of hydrate formation. However,water-oil emulsification of the system is getting worse with the action of combined hydrate inhibitor,and the bigger hydrate agglomerates appear during the formation of hydrate. Finally,the inhibition mechanism of combined hydrate inhibitor was also studied in this paper based on competitive adsorption effect.