STUDY ON THE FORMATION OF RESIDUAL WATER WITH TRANSPARENT POROUS MODELS

A transparent porous model and the related experimental method are recommended. The various types of residual water observed in this model during displacing water by air (or kerosene) under water-wet condition are described.The experimental results of this model indicate that the hete-rogeneity of pore structure plays an important role in the formation of residual water, the process of which is excellently demonstrated in the photographs presented in this paper.