Well Control - Volumetric Method
Well control by the volumetric method is a technique whereby bottom hole pressure is maintained slightly in excess of pore pressure whilst the gas influx is allowed to expand as it migrates to surface. The technique is a temporary well control method to be employed until other/better well control methods can be used to restore primary well control.
The volumetric method is applied initially when the well is closed-in and when conventional circulation is not possible (e.g. string plugged or partially/completely removed from the well, pump problems, etc.) and . . .