## Material Balance Equations Exam Preparation

# Limitations & Assumptions

## Limitations

The most significant limitation of the MB calculation is that there is no time factor included. That means that while a material balance calculation can tell us what happened, __it can’t tell us when it happened__. If we combine the material balance calculations with other methods it is possible to infer time information. The combination between the time information from well productivity equations and the pressure/production information from MBE can give time details. (more…)