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The key objectives of Production Analysis is to understand the historical flowrate dynamics (and its components water cut Yw and gas-oil-ratio GOR) and predict its future dynamics in response to other dynamic variables.
Unlike well tests 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, 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:
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