Three phase equilibrium conditions for the N-2 + CO2 + H2O system in vapor-liquid water-hydrate (V-L-W-H) equilibrium were determined. The temperature and pressure conditions studied were in the range of (275 to 283) K and (2.0 to 22.4) MPa, respectively. As the system has 2 degrees of freedom, pressure and temperature were fixed, and gas composition was measured when equilibrium was achieved. The collected data represent points on an equilibrium plane. It was found that along any given isotherm on the plane the hydrate equilibrium pressure increases with increasing mole fraction of nitrogen in the gas phase.