Climatical changes, and especially those relative to the atmospherical conditions, green-house effect, preservation of the ozone layer, and in general all environmental protection, are increasgly necessary to improve the energy efficiency by the use of energetical sources like natural gas, with an easy available technology and less pollutant. This paper explores the evolution of natural gas industry in two important Latin American countries, characterized to be one, a great market for the use of natural gas and its derivatives in a close future, and the other an OPEC's producer, with a significant level of reserves and refining capacity production of natural gas and oil. We attempt to show some of the possible perspectives of natural gas industry and market between there two countries.1812428