A specific implementation of Well Testing based on recording and interpretation of borehole (downhole or THP) pressure response to the pre-designed flow rate variations (also called "cycles" or "pulses" ) at one or more disturbing wells inducing pressure pulse propagation across the field.
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.