Coreia do Sul iniciará troca de petróleo bruto com refinarias locais, diz ministério https://www.reuters.com/business/energy/south-korea-start-crude-oil-swap-with-local-refiners-ministry-says-2026-03-31/?taid=69cb502cc62dfa000157c40c https://www.reuters.com/business/energy/south-korea-start-crude-oil-swap-with-local-refiners-ministry-says-2026-03-31/?taid=69cb502cc62dfa000157c40c