When I hear or read the phrase “well control,” what comes to mind is blowout prevention, managed pressure drilling, and preventing gas kicks by using the appropriate mud weight.
However, recently I have been seeing the use of that same phrase, “well control,” to describe using well logs and other well data in simulators to calibrate and set limits on property distribution throughout the simulator grid.
Due to very dense well control, the maximum depth error from time-depth conversion is around 15 ft – far below the vertical resolution of the seismic data.
Let’s look closely at two definitions:
“Well control” means control of the well, much like “crowd control” means control of the crowd.
“Control well” means a well used for the purpose of control, as in controlling the limits or values in a simulator.
This is the expression that should be used in our example.
Due to the high density of control wells, the maximum depth error from time-depth conversion is around 15 ft – far below the vertical resolution of the seismic data.