Prediction Model of Rate Decline for Acid-Fracturing Vertical Wells in Pore-Cavity-Fracture Carbonate Reservoirs

Figure 5

Comparison of analytical solution and numerical solution of bottomhole pressure in a compound reservoir model under different parameters ((a) interzonal diffusivity ratio: 0.002, 0.2; (b) interzonal conductivity ratio: 0.2, 0.4; (c) elastic storability ratio of natural fracture system: 0.002, 0.2; (d) matrix-fracture crossflow coefficient: 10^-4, 10^-2).

(a)

(b)

(c)

(d)