Might be worth considering to satisfy #AER Initial Pressure requirements for oil and gas (#LNG) wells. Underbalanced conditions result in fluid inflow causing a Closed Chamber pressure build-up (similar to a Drill Stem Test, DST). Overbalanced wells react by feeding well kill fluids into the formation, causing a pressure leak-off or fall-off. If possible, install subsurface pressure recorders before perforating, or attach gauges to a shock absorber on the drop-bar. Otherwise try to run #welltest gauges in the hole as soon as possible. Landing gauges below a plug will help mitigate wellbore storage issues in low permeability systems. Either way, analysis (#PTA) is performed using impulse algorithms without flow.