中文摘要：

针对油气生产输运管线中的水合物堵塞问题,利用2.45GHz微波辐射,分别进行了甲、乙、丙烷混合气及甲烷＋甲基环己烷（MCH）水合物体系在竖直圆管中的定容消解实验。微波辐射强度分别为7.98～60.22k W·m^-2及13.65～94.34k W·m^-2,甲烷＋MCH水合物体积含量22.1%～55.4%。结果表明：在相近的温度下,微波法相比常规管道加热法所需解堵时间缩短50%以上。高辐射强度下,孔隙液态水可协同微波加快水合物消解,聚集水则可能形成热阻并过热。液态水在多相渗流作用下动态分布,是影响微波作用效果的主要因素。

英文摘要：

To solve hydrate-plug problem in hydrocarbon pipelines,decomposition of gas hydrate was studied in a vertical circular vessel under 2.45 GHz microwave （MW） radiation.The samples used are two kinds of typical gas hydrates： methane＋ethane＋propane ternary gas hydrate and 22.1%—55.4%（vol） methane＋methylcyclohexane （MCH） binary gas hydrate.The radiation power density are in the ranges of 7.98—60.22 kW·m^-2 and 13.65—94.34 kW·m^-2.Compared with conventional heating at the same temperature level,MW heating is better for hydrate-removal and the melting time is saved by more than 50%.Under high radiation level,the decomposition of hydrate can be accelerated with the help of interstitial liquid water,while the bulk water may become thermal resistance and overheated.The dynamic distribution of the liquid water during the multiphase porous flow is considered to be a main factor affecting the hydrate removal efficiency of MW heating.