In the classical reservoir engineering context, the well drainage radius is normally kept constant; while new findings indicate that it should not be kept constant; rather, the well drainage radius can be subject to change with time, depending on some operating and reservoir parameters.
I am looking for method(s) and techniques to detect and record changes in drainage radius as the well is put into production
It is certainly true that the drainage radius would change with time. Methods to discern that are not exactly lucid though. However, well test analysis a way of establishing boundary effects and by extension, the drainage radius of the well. The imaging technique in superposition should also aid in this. Dynamic simulation also shows this.
The static concept of drainage radius is rather old-fashioned and no longer valid, as the reservoir boundaries are determined with uncertainties in seismic and geological information. the dynamic radius of drainage is more important in high-mobility fluid systems, such as gas reservoirs.
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