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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
:LaTeX Math Inline body \{ q_W, \, q_O, \, q_G, \, q_{WI}, q_{GI} \}
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| oil production | gas production | water production | water injection | gas injection |
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| Fig. 1. Example of Production/injection history with one PDG well |
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