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v根据文献数据，分析了天然气采输过程中形成水合物的热力学和动力学条件。研究结果认为，加注水合物抑制剂是防止水合物形成的重要措施，近期国外开发成功的动力学天然气水合物抑制剂，如N 乙稀基吡咯烷酮的聚合物（NVP）、NVP的均聚物（PVP）是一个重要的发展方向，应引起充分地重视。此类抑制剂是在水合物形成晶核和生长的初期吸附在其表面，从而延缓了水合物晶体达到临界尺寸的生长速度。此类抑制剂虽价格较贵，但用量一般不超过3%，且药剂对环境的影响很小。同时指出，对高含硫天然气的采输而言，原料气脱水是防止水合物形成最有效的措施，而脱水工艺则以冷冻法为首选。

FORMATION AND PREVENTION OF HYDRATE DURING PROCESS OF GAS EXPLOITATION AND TRANSMISSION 1)

According to the documentary data, the thermodynamic conditions and the dynamic conditions of hydrate forming during the process of gas exploitation and transmission are analyzed. The results indicate injecting hydrate inhibiter is the major measure to prevent hydrate forming. The dynamic gas hydrate inhibiters recently developed abroad such as NVP, PVP are an important developing direction, and should be paid sufficient attention. This kind of inhibiters are adsorbed in the surface of hydrate at the early stage of crystal nucleus forming and growing so that slowing the growing velocity for the hydrate crystal to reach the critical size. This kind of inhibiters is expensive, but their using volume won’t exceed 3%, and they are environment friendly. Also, it is pointed out that as for exploitation and transmission of gas with high sulfur content, dehydration of feed gas is the most effective measure to prevent hydrate forming. And as for dehydration technology, the freeze method is the best.