The company supplies about half of the gas consumed in the country.
Energy minister Pedro Joaquín Coldwell is reported as saying that US$70bn is already committed and that another $30bn is expected to pour into the country by year end.
Energy authorities in the landlocked nation to analyze the competitiveness of the country's gas in neighboring Brazil.
The government hopes next month's power transmission auction will help kick-start investment amid Brazil's worst ever recession. BNamericas takes a close look at each of the projects that will go under the hammer.