In order to study core displacement,a CT(Computerized Tomography) measuring way of density difference which expresses the porosity distribution of oil core is presented. The measurements in reality show that the results are satisfactory.

• 为进行石油岩芯驱替机理的深入研究，应用工业CT技术，提出了一种石油岩芯孔隙度及分布CT密度差测量法，并进行了实际测量。