水合物颗粒聚集频率影响因素及正交试验

Orthogonal experiment research on factors affecting hydrate particle agglomeration frequency

水合物颗粒聚集频率研究对深水油气管道的流动安全保障和水合物浆技术的工业推广具有重要意义。本文首先定义了水合物颗粒的聚集频率并分别给出了纯水体系和油水体系中水合物颗粒聚集频率的计算公式。根据聚集频率计算公式,影响纯水体系中水合物颗粒聚集的因素主要为剪切速率、颗粒粒径、哈梅克常数和纯水黏度。影响油水体系中水合物颗粒聚集的因素主要为剪切速率、颗粒粒径、油水界面张力、接触角和油水黏度。然后,根据相关参考文献选取各影响因素取值并基于聚集频率计算公式分别计算并分析了各影响因素对水合物颗粒聚集频率的作用规律。最后,通过正交试验设计,分别确定了纯水体系和油水体系中各影响因素的影响次序及其最优组合。本文的研究成果可为深水流动安全保障和水合物浆技术提供理论支持。

The research on hydrate particle agglomeration frequency is of great importance to deep sea pipeline flow assurance and the industrial promotion of hydrate slurry technology. First,hydrate particle agglomeration frequency was defined and the calculation methods of hydrate particle agglomeration frequency in water systems and oil-water systems were given,respectively. According to the calculation methods,the influence factors affecting hydrate particle agglomeration in water systems included shear rate,particle diameter,Hamaker constant and water viscosity. The influence factors affecting hydrate particle agglomeration in oil-water systems contained shear rate,particle diameter,oil-water interfacial tension,contact angle and oil-water viscosity. Then,values of the influence factors were selected according to the relevant references. Based on the calculation methods,the influences of each influence factor on hydrate particle agglomeration frequency were analyzed. Finally,by orthogonal experiment designing,the influence orders and the optimal combinations of the influence factors were investigated. The results can provide theoretical supports for deep sea flow assurance and hydrate slurry technology.