World oil prices rose on Wednesday on the back of a weaker dollar, as traders awaited the weekly energy inventories report and the latest reading on economic output in the United States, analysts said. New York's main contract, light sweet crude for November delivery, won one dollar to stand at 67.71 dollars per barrel. Brent North Sea crude for November delivery gained 91 cents to 66.40 dollars a barrel in London. The market won support from the weak dollar, which makes dollar-priced crude cheaper for buyers using stronger currencies, thereby stimulating demand. Later on Wednesday, the US government's Department of Energy will release its weekly oil inventory report. Traders will also digest the third and final estimate of US gross domestic product (GDP) for the second quarter. Both releases are important for the oil market because the United States is the world's biggest energy consuming nation. 'Today, all focus will be on the weekly US fuel inventories data,' said VTB Capital analyst Andrey Kryuchenkov. 'We expect a small rise in US crude stockpiles, while product stockpiles might see another week of significant inventory builds.' Analysts polled by Dow Jones Newswires expect crude stocks to have risen by 300,000 barrels in the past week. Gasoline stocks are tipped to increase by 800,000 barrels while distillate stocks, which include heating oil and diesel, are seen to rise by 1.1 million barrels. Oil had fallen slightly on Tuesday on a stronger dollar and waning consumer confidence in the United States, the world's largest energy consumer. The consumer confidence index of the business research firm The Conference Board dipped in September to 53.1 from 54.5 in August as worries about a tight job market overshadowed improving economic conditions. The figure was weaker than the 57.0 expected on Wall Street, and suggested consumers may be cautious in resuming spending, which is key to economic recovery. Last week, oil prices slumped amid concerns over rising supplies and continued weak demand. Elsewhere on Wednesday, the market was expected to derive some support from simmering geopolitical tensions over key crude producer Iran. President Mahmoud Ahmadinejad lashed out at world leaders on Wednesday for demanding access to Iran's newly disclosed uranium enrichment plant being built near the central holy city of Qom. Officials of six world powers -- Britain, China, France, Germany, Russia and the United States -- are to meet Iranian chief negotiator Saeed Jalili on Thursday to discuss Tehran's controversial nuclear programme. Western powers suspect the programme is aimed at making atomic weapons, a charge which Iran denies. Iran pumps about 3.8 million barrels of crude oil per day and is the third biggest global oil exporter after Russia and Saudi Arabia. 