Abstract
In some fields, the ability to obtain reliable water production numbers is hard to do. Case in point is one Saudi Aramco offshore field. This particular field has all wells on electrical submersible pumps (ESPs) and has supervisory control and data acquisition recorded real time. Oftentimes the timing of getting the samples to shore, the lab, and to the desktop of the engineer takes a very long time. By modeling and using the pressure-volume-temperature (PVT) data from the reservoir and the pump discharge pressure of a well we can determine what water cut is necessary to match the surface flowing wellhead pressure (also taking into account frictional losses). Utilizing this method allows Saudi Aramco to monitor water production in the field and then to verify it with actual water samples whenever the data becomes available.
