The four founding member nations stripped Venezuela of its membership rights for not complying with the bloc's trade and human rights rules.
Mexico's state oil firm says it will save nearly US$30mn a year over the next four years after revising procurement plan.
Petroperú's president and his board of directors resigned and will be replaced immediately, according to the government.
Venezuela hailed the decision to slash output to 32.5Mb/d, down from a previous ceiling of 33.6Mb/d.
The death of Fidel Castro last week raises questions about whether the island nation will remain isolated.
Brazilian lawyer Paulo Valois, an oil and gas industry specialist, gives BNamericas his view on the main hurdles the country's federal and state governments will need to clear on the path to opening up the nation's natural gas market.
Authorities report that more than 12 companies are interested in running the facility.
The power trading company says consumers are being drawn to the deregulated market by lower prices as higher rainfall boosts hydroelectricity while a recession erodes demand.