Analyzing Tight Sand Characteristics and Its Influence on Aqueous Phase Removal by Gas Displacement

Figure 9

The SEM picture: (a)–(c) belong to M47-3, (d)–(f) belong to S133-4, and (g)–(i) belong to S31-1.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)