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.
Unlike Well Tests which normally last for few hours or few weeks, Production Analysis usually covers a time period from few months to many years.
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) | WOR 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 |
|---|
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling
[ Primary production analysis (PRIME) ] [ Statistical Production Data Analysis ] [ Productivity Diagnostics ]
[ Recovery Factor (RF) ] [ Depletion Factor (DF) ] [ Watercut Diagnostics ] [ GOR Diagnostics ]
[ Instantaneous Voidage Replacement Ratio (IVRR) ] [ Cumulative Voidage Replacement Ratio (CVRR) ] [ Voidage Replacement Balance (VRB) ]
[ Pressure Deconvolution ][ Capacitance Resistance Model (CRM) ] [ Pressure-Rate artificial neural network (PRANN) ]
|