AWS pressure surveys determine the reservoir pressure from surface using pressure transducers and sound waves on oil and gas producing wells.  Automated well-head equipment is attached to a well to measure the fluid level, casing head pressure and surface temperature at a predetermined schedule for a period of time necessary to accurately determine the reservoir characteristics.  Analysis of acoustic pressure survey data can also detect the existence of near wellbore formation damage that prohibits the entry of fluids into the casing, reservoir boundaries, communication, production capabilities and much more.