Research Article

New Understanding of Transient Pressure Response in the Transition Zone of Oil-Water and Gas-Water Systems

Figure 2

The procedure of nested grid systems, in which the size of the grid cells in each direction can be reduced step by step until the size of the near wellbore grid cells is close to the radius of the wellbore. (a) The basic configuration of nested grid systems. (b–f) The distribution of oil saturation, which indicates that the size of nested grid cells will be reduced from to .