Historical records on oil, gas, water flowrates, results of formation pressure surveys and flowing pressure (THP or BHP).
The Production History data is normally available as daily or monthly records \{ q_W, \, q_O, \, q_G, \, q_{WI}, q_{GI} \}:
q_O(t) | q_G(t) | q_W(t) | q_{WI}(t) | q_{GI}(t) |
|---|---|---|---|---|
| oil production | gas production | water production | water injection | gas injection |
| |
| Fig. 1. Example of Production/injection history with one PDG well |
