泡沫在多孔介质中生成与破灭速度的影响因素分析

 通过多孔介质中泡沫驱油的渗流数学模型,编制泡沫驱数值模拟软件。该软件可以反映泡沫渗流时涉及的生成、破灭及运移机制。以埕东油田西区泡沫驱油先导实验区为原型,分析数值模拟模型各网格泡沫生成速度、自然破灭速度和遇油破灭速度分布与影响因素的统计规律。结果表明,泡沫生成速度随平均渗透率、含气饱和度、气相中泡沫摩尔分数的增大而增大,随含油饱和度的增大而减小;泡沫自然破灭速度随平均渗透率、含气饱和度、含油饱和度和气相中泡沫摩尔分数的增大而增大;泡沫遇油破灭速度随含油饱和度、气相中泡沫摩尔分数的增大而增大。

Analysis of influential factors on foam generation and coalescence rate in porous media

A numerical simulator describing foam generation, coalescence and migration during the process of foam flooding in porous media was developed based on the established mathematical model. Taking the pilot test area of foam flooding in west block of Chengdong Oilfield as an example, this paper analyzes the rate distribution and influential factors of foam generation, natural coalescence and oil-contacting coalescence in each grid by using the numerical simulator. The results show that foam generation rate increased with average permeability, gas saturation and foam mole fraction in gas phase, while it decreased with increasing oil saturation. Natural coalescence rate increased with average permeability, gas saturation, oil saturation and foam mole fraction in gas phase. Oil-contacting coalescence rate increased with oil saturation and foam mole fraction in gas phase.