Review of Petroleum and Hydrogeology Equations for Characterizing the Pressure Front Diffusion during Pumping Tests

In hydrogeology, the pressure front diffusion equation is crucial for interpretation of pumping tests. It describes displacement around well generated by a hydraulic disturbance, such as or injection. This serves to physically locate objects (the recharge boundary, impermeable fault and connection) that are able influence hydrodynamic behaviour aquifers during transient test. However, several authors who have attempted characterize this come up with different expressions because has been defined according approaches. paper first clarifies origin divergence between before reviewing seven approaches used equation. addition, new approach proposed, which more practical defines using logarithmic derivative drawdown. Finally, all these reviewed approaches, plus one, unified into single general criterion, critical drawdown, noted sc. To do this, criteria each existing approach, including were converted equivalent drawdowns. The ultimate goal study enable hydrogeologists use correctly in order improve accuracy test data better characterization geometry aquifers.