Abstract
In this work the advances in pressure transient data acquisition and analysis of pumping wells are presented. A brief summary is presented on methods used in the past 20 years for testing pumping wells. A comparison is made between pressure data acquired using bottom hole gauges and that based on indirect calculation of the bottom hole pressure by determining the liquid level in the annulus acoustically measuring the surface annulus pressure, and calculating the bottomhole transient pressure. The quality of the acquired data using the previously mentioned method is the main topic of discussion and its use and/or limitations for resevoir and well evaluation. Several field examples are used to ilustrate the presentedmethods. As a main result it is concluded that pressure data acquisition using acoustic methods is the best alternative for pumping wells. The pressure data resolution and accuracy is similar to a conventional amerada type of gauge. However the main advantage is that we can get the whole pressure transient profile (flowing/buildup) in real time if necessary. This definitely provides an enhanced data interpretation that can be used for resevoir evaluation specially for secondary recovery projects.
