A well livening downhole tool for the in-situ production of nitrogen is provided. The well livening downhole tool may produce nitrogen in-situ in a well to lighten the fluid column and lift the well fluids. The well livening downhole tool may include sodium azide and other reactants to produce nitrogen and scavenge other reaction products to produce alkaline silicate and water. The well-livening downhole tool may include multiple modules each having nitrogen-producing reactants and ignition components such that each module may be activated independently to produce nitrogen at different depths. A process for lifting the well fluids using the well livening downhole tool is also provided.