地面集输管线中水合物堵塞预测研究

天然气水合物一旦在地面集输管线中形成就会造成阀门堵塞、管道停输等严重事故，造成重大的经济损失。气流组成、温度、压力和含水量是影响地面集输管线中水合物形成的主要因素，此外，气井产量、管线长度、油管直径等对水合物的形成也有一定的影响。本文综合国内外有关水合物研究成果，并结合长庆气田某气藏生产过程中天然气水合物的生成条件及防治措施，对地面集输管线中天然气水合物堵塞的生成条件及预测模型进行了研究。

PLUGGING PREDICTION STUDY OF GAS HYDRATE IN GATHERING PIPELINE

Once formed in gathering pipeline, the natural gas hydrate can plug the pipeline and equipment, which will be dangerous for the production and even lead to economical loss. The factors concluded gas composition, temperature, pressure and water content is major factor for hydrate formation, furthermore, gas well production, length of the pipeline and pipe diameter and so on also affects the formation of hydrates to some extent. This article synthesized lots of research findings about gas hydrates, and combined the formation condition and prevention for gas hydrates in the production process of ChangQing Field. The paper also studied the formation conditions for predict hydrate plugging and the hydrate formation thermodynamic model in gathering pipeline.