恒速压汞技术在储层孔隙结构研究中的特点及应用

Characteristics and application of rate-controlled mercury porosimetry in reservoir pore structure study

恒速压汞通过对压汞过程中压力涨落的监测,实现对孔隙和喉道的区分,并计算获得孔隙、喉道的大小及数量。与常规压汞相比,具有理论模型接近实际,压汞过程为准静态过程,获得实验数据多的优点,但也存在适用范围有限。随着恒速压汞技术应用,表现出从单一应用逐渐到与其他孔隙结构研究技术结合应用的趋势。

Rate-controlled mercury porosimetry can be used to distinguish the pore and throat by monitoring fluctuation of pressure in the process of mercury penetration.the size and the quantity of the pores and throats can be obtained by calculation as well.Compared with the pressure-controlled porosimetry,rate-controlled porosimetry has some advantages,which include the theoretical model closed to real,quasi-static process of mercury injection and massive experimental data.However,its limited scope of application has developed the tendency from single use of rate-controlled mercury porosimetry to comprehensive usage combined with other pore structure technologies.