A specific implementation of Well Testing based on recording and interpretation of borehole (downhole or THP) pressure response to the dedicated flow rate variations (also called "cycles" or "pulses" ).
The usual practise is to create 3 - 5 pulses.
The pressure response can be recorded in
- the same well where the flowrate is varying (called Self-Pulse Test)
or
- the offset well (called Pressure Pulse Interference Test)
The physics of pressure pulse propagation. across the field has some specifics.
In case of harmonic pressure pulsations and sufficiently long pressure-rate delay and a simple diffusion model (single-bed homogeneous reservoir without boundary) the test data can be approximated by analytical model.
In case of non-harmonic the pressure pulse response is being matched by numerical model.
The key element of pressure pulsation methodology is Detrending.