水合物聚集影响因素及正交试验研究

通过水合物聚集体受力分析确定了其主要聚集力是毛细液桥力,完善了水合物聚集体临界最大粒径计算模型.水合物聚集影响因素有接触角、油水界面张力、油相粘度、水合物体积分数、剪切速率,分析单一因素变化对水合物聚集的影响,发现油水界面张力增大导致聚集加剧,其他因素增大则会抑制水合物聚集.以水合物聚集体临界最大粒径作为聚集程度的评判指标,利用正交试验确定了因素水平的最优组合,水合物体积分数作为影响最大的因素,需要首先将其控制在最优水平.研究成果可为确保管输水合物浆稳定流动提供支持.（表3,图7,参14）

Orthogonal experiment research on factors affecting hydrate accumulation

By analyzing forces of hydrate, it is found out that the main agglomeration force is capillary bridge force, and the calculating model of maximum critical particle size of hydrate aggregate is improved. Factors affecting hydrate accumulation include contact angle, interracial tension of oil and water, viscosity of oil phase, hydrate volume fraction, and shear rate. By analyzing the effect of a single factor on hydrate agglomeration, it is concluded that the increase of oil-water interracial tension will lead to intensified aggregation, while the increase in other factors will drcrease hydrate agglomeration. Taking the maximum critical particle size of hydrate aggregate as the indicator to judge agglomeration degree, orthogonal experiment is used to figure out the optimal combination of factor level, hydrate volume fraction as the most influential factors is needed to be controlled at the best level. The research result can provide a support to the hydrate control and ensure steady operation of pipeline. （3 Tables, 7 Fimares. 14 References）