高温高压渗流微观成像实验系统研制与应用

Development and Application on Microscopic Imaging Experimental System of Seepage under High-temperature and High-pressure Condition

为了更好地从微观尺度揭示流动机理,研制了高温高压多相渗流显微成像实验系统,开发了孔隙尺度的多相流体成像识别技术。以CO_(2)在不同孔隙通道结构微芯片中驱替咸水实验为例,介绍了该实验系统的使用步骤和方法,利用荧光倒置显微镜结合高速相机,捕获了CO_(2)咸水层封存中的两相微观渗流过程。通过后期图像处理可以定量分析饱和度等物性参数,为系统掌握多相流体微观渗流规律提供了必要的基础实验数据,为工程应用提供一定的理论参考。

The study of multiphase flow characteristics in porous media is of great significance for engineering projects such as oil and gas recovery and chemical reaction.In order to better reveal the flow mechanism,imaging technology of multiphase flow at the pore-scale is explored,and a micro-visualization experimental system is built to be suitable to high temperatures and high pressures.The operating steps and experimental methods of this system are introduced in detail in the case of CO_(2) displacing brine in microchips with different structures.The process of two-phase flow in porous media is captured by fluorescence inverted microscope and high-speed camera.Through the image processing,the physical parameters such as saturation,are quantitatively analyzed,and the relevant seepage characteristics are understood.These can provide the theoretical guidance for CO_(2) sequestration into the saline aquifer in China.