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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)
Based on the stress analysis of the hydrate aggregates, the main aggregation force of the hydrate aggregates is the capillary bridging force, and the critical maximum particle size calculation model of the hydrate aggregates is perfected. The influence factors of hydrate aggregation include contact angle, oil-water interfacial tension, oil phase viscosity, hydrate volume fraction and shear rate. The influence of single factor on hydrate accumulation was analyzed. It was found that the increase of interfacial tension between oil and water led to the increase of interfacial tension and other factors Large will inhibit the hydrate accumulation. Taking the critical maximum particle size of hydrate aggregates as the evaluation index of aggregation degree, the optimum combination of factors was determined by orthogonal test. The hydrate volume fraction was the most influential factor, which should be controlled at the optimal level first. The results of this study can provide support for the steady flow of pipe hydrate slurry. (Table 3, Figure 7, reference 14)