超临界二氧化碳泡沫在低渗多孔介质内的渗流特性及渗流机理研究

项目名称： 超临界二氧化碳泡沫在低渗多孔介质内的渗流特性及渗流机理研究

项目编号： No.51476081

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 杜东兴

作者单位： 青岛科技大学

项目金额： 80万元

中文摘要： 基于泡沫技术在增产与稳产非常规原油资源及提高二氧化碳地质埋存效率方面的巨大应用前景，本项目对超临界CO2泡沫在低渗多孔介质内的渗流特性和渗流机理进行针对性研究。研究内容包括三个方面： 1. 超临界CO2泡沫在低渗介质内渗流特性的实验研究。采用CT测试技术可视化低渗介质内超临界CO2泡沫的动态渗流过程并获得介质内液相饱和度的变化规律，再结合沿程渗流压力的同步测量，对其宏观渗流特性进行系统研究。2. 超临界CO2泡沫流变学特性研究。通过测量微细通道及不同形状通道内泡沫的流动特性，建立基于两相体系的泡沫流变学模型，从微观上理解其高表观粘度的成因并对其在低渗介质内的渗流机理进行探讨。3. 超临界CO2泡沫在低渗介质内渗流过程的模拟研究。基于统计原理建立简单且能正确描述泡沫在介质内生成、发展和湮灭等动态过程的泡沫数目守恒模型。同时考虑非达西渗流现象，利用数值方法对其渗流特性及渗流机理进行分析和研究。

中文关键词： 超临界二氧化碳；泡沫；低渗多孔介质；渗流特性；渗流机理

英文摘要： Foam technology has great application prospects on enhancing and stablizing oil production from unconventional reservoirs and as well on increasing the geological storage efficiency of Carbon Dioxide. Accordingly we propose in this project to carry out relevent studies focusing on flow characteristics and flow mechanism for supercritical CO2 foam flow in low permeability porous media. Research works will be conducted in following three aspects. 1. Experimental studies on flow characteristics for supercritical CO2 foam flow in low permeability porous media. X-Ray CT instrument will be employed to visualize the dynamic foam flow process and to obtain the water saturation distribution along the sample core. In the mean time, pressure drop along the foam flow direction will also be recorded to perform systematic studies on macroscopic foam flow characteristics in porous media. 2. Experimental studies on supercritical CO2 foam rheology. With accurately measured resistance characteristics for foam flow in microchannels or channles with different internal shapes, a foam rheology model will be built based on two phase system to help understainding the cause of high foam apparent viscosity and analyzing the mechanisms of foam flow behavoir in low permeability porous media from microscopic viewpoint. 3. Simulation studies on supercritical CO2 foam flow in low permeability porous media. A simple but robust stochastic foam population balance model will be proposed for properly describing supercritical CO2 foam generation, development and collapse in low permeability porous media. Based on the proposed model with taking into consideration of Non-Darcy effect, numerical simulations will be carried out to study supercritical CO2 foam flow characteristics and mechanisms in low permeability porous media.

英文关键词： supercritical CO2;foam;low permeability porous media;flow characteristics;flow mechanism