One of the Subsurface E&P Disciplines, related to long-term analysis of production/injection history and its correlation with bottom-hole pressure measurements and/or formation pressure from well tests.
The key objectives of Production Analysis is to understand the historical flowrate dynamics (and its components water cut Yw and gas-oil-ratio GOR) in the context of Well-Reservoir System (WRS) and predict its future dynamics in response to other dynamic variables.
Some properties of Well-Reservoir System (WRS) can be assessed through both Production Analysis or Well Tests (for example, Productivity Index and drainage volume ) and some other properties are specific to either Production Analysis (for example, Watercut Diagnostics ) or Well Tests (for example, skin-factor).
Production Analysis is usually split into the following categories by objectives:
|Well Flow Performance (WFM)||Watercut Diagnostics||Waterflood Diagnostics||WRC Diagnostics|
|Productivity Diagnostics||GOR Diagnostics|
and into three categories by the mathematical methodology:
|Empirical Production Data Analysis||Statistical Production Data Analysis||Physical Production Data Analysis|