By Arathy Somasekhar HOUSTON, Dec 12 (Reuters) – Oil prices closed lower on Friday, marking a 4% weekly decline as a supply glut and a potential peace deal between Russia and Ukraine outweighed concerns about any impact from the U.S. seizure of an oil tanker near Venezuela. Brent crude futures were down 16 cents at $61.12 a barrel, while U.S. West Texas Intermediate crude was down 16 cents at $57.44. Both benchmarks fell about 1.5% on Thursday and have lost more than 4% this week. “The market continues to be weighed down by the crude oil supply situation… on the other hand, the oil market is ignoring the tension between the US and Venezuela,” said Andrew Lipow, president of Lipow Oil Associates. The US has seized an authorized oil tanker off the coast of Venezuela, President Donald Trump said Wednesday. The US is preparing to intercept more ships carrying Venezuelan oil after the seizure of a tanker this week, six sources close to the matter said Thursday. Traders and analysts largely shrugged off concerns about the impact of the seizure on the tanker, pointing to ample supply in the markets. International Energy Agency forecasts published on Thursday indicated that global oil supply will exceed demand by 3.84 million barrels per day next year – a volume equivalent to nearly 4% of global demand. Data in OPEC’s report, also released on Thursday, indicated that global oil supply will closely match demand in 2026, contrary to the IEA’s view. Some price-supporting factors remain, including rising tensions between the U.S. and Venezuela, and Ukrainian drone strikes on a Russian oil rig in the Caspian Sea, said Janiv Shah, analyst at Rystad Energy. Russia’s seaborne oil product exports fell just 0.8% in November from October, with the completion of refinery maintenance helping to offset a slump in fuel exports from southern routes such as the Black Sea and Sea of ​​Azov, data from industry sources and Reuters calculations showed. (Reporting by Seher Dareen in London, Yuka Obayashi in Tokyo and Siyi Liu in Singapore. Editing by Alex Lawler, Nia Williams and Daniel Wallis)