Two dimensional numerical simulation of transient foam displacement process in homogeneous porous media

doi:10.11949/j.issn.0438-1157.20180770

Abstract

Abstract:

Two-dimensional numerical simulations have been carried out in this paper concerning the dynamic foam displacement process in a homogeneous porous media with confined inlet and exit geometry arrangements. Stochastic bubble population balance model is employed to describe the foam generation process and the IMPES algorithm is used to solve the equation sets of transient two-phase flow process. Detailed analysis has been carried out based on numerically obtained two dimensional parameter distributions of water saturation, water pressure and bubble density. Obvious development progress has been observed near the core inlet in the dynamic foam flooding process, whereas the effect of shrinking outlet could be neglected before the foam fluid making breakthrough from the sample. Good agreements between numerical and corresponding experimental results indicate the stochastic bubble population model could describe adequately the foam generation and coalescence mechanism and therefore could be applied to simulate and predict accurately the foam dynamic propagation process in homogeneous porous media.

Key words: foam, porous media, two-phase flow, simulation, two dimensional

摘要：

利用随机泡沫数目守恒模型，针对具有收缩进口及收缩出口的均质多孔介质二维模型，对泡沫流体驱替突破前的动态过程开展了数值模拟研究。采用IMPES方法对二维两相泡沫动态驱替过程的控制方程组进行求解，通过液相压力、液相饱和度、气泡数目等参数在多孔介质内的分布结果对泡沫动态驱替特性进行了分析研究。数值模拟结果表明，泡沫驱替过程显示出明显的入口效应，其压力分布、液相饱和度及泡沫数目分布随气体与活化剂溶液在缩小入口的注入呈现明显的发展过程。在泡沫液未完成驱替突破的情况下，缩小出口未显示出对泡沫液驱替特性的影响。数值计算结果与相应实验结果趋势一致，表明所采用的随机泡沫数目守恒模型能够正确表征多孔介质中泡沫的生成及湮灭机理，进而对泡沫液在均质多孔介质内的动态驱替特性进行准确模拟和预测。

关键词: 泡沫, 多孔介质, 两相流, 模拟, 二维

CLC Number:

0359⁺.1

DU Dongxing, ZHANG Dan, LI Yingge, CHAO Kun, MA Lianxiang. Two dimensional numerical simulation of transient foam displacement process in homogeneous porous media[J]. CIESC Journal, 2018, 69(S1): 48-52.

杜东兴, 张丹, 李莺歌, 巢昆, 马连湘. 泡沫液在均质多孔介质内动态驱替过程的二维数值模拟研究[J]. 化工学报, 2018, 69(S1): 48-52.

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