@ Tu.144
I do not know how things are done in Colombia, but here, we have to declare "Minimum Fuel" when it is to be foreseen that, following the present cleared route, fuel on landing will be less than Alternate Fuel plus required final reserve (30 minutes in most cases)
Wrong. "Minimum Fuel" is declared when, having commited to land at a specific aerodrome, any change to the existing clearance to that aerodrome may result in landing there with less than planned final reserve fuel i.e. 30 minutes remaining.