油藏物理模拟声场测试实验平台的开发

摘要

A non-invasive method for reservoir physical simulation was proposed to monitor the dynamic distribution of fluids in porous sand by using ultrasonic transmission,and a corresponding experiment platform was designed and developed.By the transmission characteristics of ultrasonic wave in different mediums with different speeds and different absorption attenuations,the arrival time and amplitude of the first wave were measured,and then the mean velocity and amplitude attenuation of ultrasonic wave were acquired to reflect the change of fluid fractions.Considering the time and ultrasonic array distribution,the saturation distribution of each fluid was obtained.Therefore,the visualization of the dynamic distribution of each fluid is realized.These can be used to investigate the migration process and the migration law of each fluid.By experiments for more than two years,the function of the platform is normal,and it provides a lot of basic data for oil displacement mechanism and efficiency.%提出了一种用于实时监测油藏物理模拟驱替实验过程中岩芯多空隙内各相流体(油、水、CO2)空间动态分布的非侵入式方法——超声透射法,并开发了相应的声场测试实验平台.利用超声波透射岩芯的声速变化和声幅衰减特征,实现驱替过程中岩芯空隙内各相流体饱和度的动态测量,结合不同时刻、超声探头阵列的分布位置,实现了各相流体运移过程的可视化.经过2 a多的多次实验表明,各项功能运行正常,为明确驱替过程中岩芯孔隙内各相流体的运移过程和运移规律进一步为驱油机理、驱油效率等研究提供了试验基础数据.