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Specific type of Production Analysis (PA) workflow based on correlation between single-well or multi-well production/injection history and field-average formation pressureIt may also include BHP pressure data records if they are available and were varying over time.
The key assumption of MatBal is a pseudo-steady state correlation between cumulative offtakes/intakes and formation pressure dynamics.
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| MatBal Pressure @model | MatBal Flow @model |
| Formation pressure model only | Formation pressure and flowrate model |
In some cases a similar analysis can be performed using the correlation between production/injection history and BHP which is called Flowing Material Balance Analysis (FMB).
Objectives
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| Check if the field is under volume-constrained production (PSS) |
| Assess drainage volume |
| Assess reservoir compressibility |
| Check if water and gas propagation match uniform sweep model |
| Verify oil/gas FVF |
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[ Material Balance Pressure @model ] [ Material Balance Flow @model ]
[ Flowing Material Balance Analysis (FMB) ]