NOVELTY - The process for the treatment of natural gas having methane and carbon dioxide, comprises deacidifying the natural gas to obtain a deacidified natural gas and a carbon dioxide rich stream, transforming a part of deacidified natural gas to obtain a gaseous mixture by a vapor reforming reaction in presence of water at a pressure and temperature of 5-60 bars and 500-1000degreesC, reacting the gaseous mixture with methanol to produce an effluent at a pressure and temperature of 1-100 bars and 50-400degreesC, and contacting the carbon dioxide rich stream with hydrogen rich stream.    USE - The process is useful for the treatment of natural gas having methane and carbon dioxide (claimed) with enhancement in carbon dioxide thus producing formic ester and methane.    ADVANTAGE - The process improves the extraction profitability of natural gas thus enhancing the transformation of all or a part of the carbon dioxide.    DETAILED DESCRIPTION - The process for the treatment of natural gas having methane and carbon dioxide, comprises deacidifying the natural gas to obtain a deacidified natural gas and a carbon dioxide rich stream, transforming a part of deacidified natural gas to obtain a gaseous mixture by a vapor reforming reaction in presence of water at a pressure and temperature of 5-60 bars and 500-1000degreesC, reacting the gaseous mixture with methanol to produce an effluent at a pressure and temperature of 1-100 bars and 50-400degreesC, and contacting the carbon dioxide rich stream with hydrogen rich stream to produce a hydrogenation reaction and a mixture of methane and water at a pressure and temperature of 5-150 bars and 100-500degreesC. The effluent is separated in a formic ester rich stream and the hydrogen rich stream. The mixture of methane and water is separated in a methane rich fraction and a water rich fraction, which is recycled to the transforming step. The gaseous mixture has a molar ratio of hydrogen to carbon monoxide of 3-4 moles/mole. The vapor reforming reaction is adjusted so that a part of methane is not consumed.    DESCRIPTION OF DRAWING(S) - The figure shows the process of the treatment of natural gas.    Conveying the natural gas to a deacidification unit having solvents (1)    Conveying the solvents to a regeneration unit (2)    Converting hydrogen sulfide into sulfur (3)    Evacuation of carbon dioxide (4)    Regenerating the solvent. (5)