Is a simple P.I. equation in well performance analysis sufficient? Consider that while changes in P.I. indicate performance shifts, it doesn’t reveal the underlying reasons. This presentation delves into the limitations of the P.I. equation, highlighting factors like changing permeability, reservoir pressure, fluid properties, skin, and additional wellbore pressure drops. ODSI introduces methods for analyzing these changes, including data screening, analysis, and Nodal Analysis. The approach is geared towards identifying specific components affecting P.I., thus providing a more nuanced understanding of well performance beyond mere P.I. calculations on the validity of blind mapping models and the requirements for generating results.