Mapping of Residual Oil and Water Saturation in Porous Media by Means of Digital X-ray Laminography

摘要

The possibility of applying a digital X-ray laminography method to the example of mapping the fluid distribution in porous media is studied.The study is performed on the basis of a system which models the process of oil displaced by water and gas as occurs in oil field development.Two methods of tomographic section recovery are discussed: geometric and algebraic,and their application for different specimen structures is made.It is shown that when scanning with steps of 25 mu m,100 mu m,250 mu m,or 2 mm it is possible to determine the distribution of concentrations of heterogeneities for multiphase fluid inside a porous core sample layer,giving advantages compared to simple shadow pictures.