Gas Transport in Shale Nanopores with Miscible Zone

Figure 2

The elevation of water and gas at equilibrium in a pore, the density 2D distribution of gas and water molecules, and an average density distribution curve of gas and water in the plane under a static equilibrium state of equilibrium molecular dynamics [24]. (a) The elevation of water and gas at equilibrium in a pore. The gray ball represents the carbon atoms in the methane molecule, which can represent gas molecules. The green ball represents the oxygen atoms in the water molecule, which can represent water molecules. (b) The density 2D distribution of gas. (c) The density 2D distribution of water. (d) The density distribution curve of water and gas molecules along the direction, and (e) is the density distribution curve of water and gas along the direction. The shaded areas are estimated to be highly interactive between the gas and water molecules.

(a)

(b)

(c)

(d) direction

(e) direction