中文摘要：

回顾了CO2在油藏流体中扩散的国内外研究进展。简述了气体在液体中扩散系数的测定原理和实验方法,并比较了常见方法的优缺点,对于其在油藏流体中CO2的扩散过程的适用性进行了研究。总结了CO2在不同性质油藏流体中的分子扩散系数,讨论了影响扩散系数的主要参数和扩散系数的变化规律,给出了不同特定条件下的一些关联式。最后,针对国内真实油藏情况和扩散研究的缺乏,探讨了高温高压下测定扩散系数方法的优选,为今后的研究提供参考。图3表1参28

英文摘要：

The international research progress of the diffusion coefficient of C02 in reservoir fluids was reviewed. The measurement principle and experimental methods for diffusion coefficient of gas in liquid were summarized. The advantages and disadvantages of common methods were compared, and the applicability of these methods in the diffusion process of CO2 in reservoir fluid was studied. The diffusion coefficients of C02 in various reservoir fluids were listed, the main affecting parameters and variation of diffusion coeffi- cients were discussed, and some typical correlations of diffusion coefficients were proposed. Finally, in view of the domestic reservoir condition and the lack of diffusion research, the optimization of experimental methods under high pressure high temperature was dis- cussed, which provided a reference for future research.