VIENNA — Even as United Nations climate-conference delegates met near Paris on Friday seeking ways to reduce the globe’s dependence on high-carbon fuels like oil, some of the world’s biggest petroleum producers vowed to keep pumping flat out.

The Organization of the Petroleum Exporting Countries said on Friday that it would keep producing oil at current levels, which are estimated to exceed 31 million barrels a day.

But with petroleum prices continuing to plummet and world leaders intent on steadily reducing the burning of oil and natural gas, OPEC, meeting in this holiday-bedecked city, might be celebrating what history could show to be Big Oil’s last hurrah. Some OPEC members, including the United Arab Emirates, have acknowledged that their economies need to diversify and wean themselves from an oil-rich diet.