Decline Diagnostics Analysis

Diagnostic analysis for decline curve interpretation using derivative-based methods. These tools help identify flow regimes and validate decline model selection.

Diagnostic Functions:

• Bourdet Derivative: Smoothed rate derivative for flow regime identification
• Beta Parameter: β = t × D identifies decline type (linear, radial, etc.)
• b(t) Parameter: Time-varying b-factor shows transition from transient to BDF
• D(t): Instantaneous decline rate