Table 4
Comparison of propped hydraulic fractures around producer and WIFs around water injector (modified from Rizwan [28]).
| Propped fractures in producer | Fractures in water injector | |
|---|---|---|
| Type of fracture | Static (non-shrinking) | Non-static (shrinking) |
| Type of PTA used | Pressure build-up | Injection fall-off |
| Fracture induced intentional or accidental? | Intentional | Accidental |
| Proppant used? | Yes | No |
| Fracture closure occurs? | No | Yes |
| Fracture storage occurs? | No | Yes |
| Closure induced flow affects PTA? | Not observed | Strongly observed |