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Climate forecasts for the upcoming Southern Hemisphere spring point to an El Niño phase that would expand Argentina's exportable gas surplus while increasing Brazilian demand for thermal generation. The combination creates favourable conditions for a structural increase in cross-border gas trade between the two countries.
According to projections cited by the Latin American Energy Organisation (OLADE), El Niño conditions during the next Southern Hemisphere spring would generate opposing effects on the energy systems of Argentina and Brazil. In Argentina, higher rainfall would expand hydroelectric generation, reducing the need to use natural gas in thermal power plants and freeing up volumes for external markets.
In Brazil, lower water availability in reservoirs would limit hydroelectric production, which remains the country's primary source of electricity. The resulting gap would have to be covered by gas-fired thermal generation, increasing the country's demand for natural gas imports.
The expansion of unconventional gas production in Vaca Muerta has positioned Argentina with a structurally larger gas supply than in previous cycles. The increase in shale gas output has enabled the country not only to cover domestic demand but also to consolidate firm export contracts and pursue new external markets.
Argentina has recently strengthened firm gas supply to Chile through long-term contracts and is in parallel advancing negotiations to expand sales to Brazil. The route under discussion makes use of the pipeline network that connects Argentina to Brazil through Bolivian territory, taking advantage of existing infrastructure rather than requiring large-scale new construction in the short term.
The Bolivian gas pipeline network is emerging as a strategic corridor for the integration of the southern South American gas market. Bolivia itself is promoting greater utilisation of its existing infrastructure to position the country as an energy corridor between Argentina and Brazil, two markets that would otherwise require new pipeline construction to connect at scale.
Guido Maiulini, representative of OLADE, indicated that the conditions of the next spring would allow a significant increase in cross-border gas trade between Argentina and Brazil, with the combination of higher Brazilian demand and Argentine surplus providing the structural conditions to consolidate the regional integration.
OLADE estimates that the development of an integrated regional gas market would require investments of approximately USD 18 billion in infrastructure. If those investments are realised, the cross-border gas trade between Argentina, Brazil, Bolivia, Chile, Paraguay and Uruguay could reach between 60 and 70 million cubic metres per day, with an annual commercial value of approximately USD 5 billion.
The figures suggest that the current pipeline trade between Argentina and Brazil represents only the initial stage of a broader regional integration cycle, contingent on coordinated investment in transport infrastructure, storage capacity, and regulatory alignment across jurisdictions.
The expansion of pipeline gas exports to neighbouring countries forms part of a wider strategic profile that Argentina is consolidating across the energy sector. The country is also advancing projects to increase oil exports from the coast of Río Negro and is preparing its entry into the international liquefied natural gas market, with floating liquefaction vessels expected to come into operation from 2027.
The combination of pipeline exports to South American markets, oil exports through the Atlantic, and LNG capacity directed at global markets positions Argentina as a multi-channel energy supplier within the next two to three years.
The convergence of climate conditions, expanded Vaca Muerta production, and existing pipeline infrastructure creates a structural window for Argentina to consolidate its role as a regional gas supplier. The capacity to translate the current opportunity into long-term contractual relationships will depend on the alignment between domestic production growth, infrastructure utilisation, and regulatory frameworks governing cross-border trade.
For investors and operators in the regional energy sector, the next Southern Hemisphere spring represents both a near-term commercial signal and a test case for the broader integration thesis that has been advanced by Argentine and Brazilian authorities over recent years.
Sources:
Diario Río Negro, "Un fenómeno climático que juega a favor: Argentina podría exportar más gas a Brasil," 29 June 2026.
https://www.rionegro.com.ar/energia/un-fenomeno-climatico-que-juega-a-favor-argentina-podria-exportar-mas-gas-a-brasil/
