When drilling or workover fluids exert hydrostatic pressures that exceed formation pressure, reservoir fluids are prevented from entering the wellbore. Pumping nitrogen gas through the CT string and into the fluid column is a common method for reducing hydro-static pressure within the wellbore to initiate production. The CT string is run to its target depth, and the nitrogen is pumped through the string to reduce the density of the hydrostatic column. When the hydrostatic pressure of the fluid column drops below reservoir pressure, the well can flow.