Oil is headed for its biggest weekly gains since the middle of January as supply disruptions and rising demand supported sentiments.

Oil prices fell on Friday but were still poised for a weekly gain on supply disruption in Russia while uncertainty looms over a potential peace deal in Ukraine.

Crude futures were edging lower in early trade but are still poised for weekly gains of more than 1.5% on rising supply concerns and a weaker U.S. dollar. Prices are supported by disruptions to Kazakh

The market is weighing the impacts of sanctions, drone attacks on Russian oil infrastructure, and the reduction of CPC oil flows from Kazakhstan.

Oil prices fell 2% on Friday but were still on track for a weekly gain on supply disruptions in Russia while uncertainty loomed over a potential peace deal in Ukraine. Brent futures fell $1.42, or 1.9%,

Oil extended a string of marginal gains to settle above $72 a barrel amid uncertainty over global supplies and a slumping dollar that made commodities priced in the currency more attractive.

U.S. crude oil inventories increased by more than expected last week in a fourth consecutive build, while product stocks declined, according to U.S. government data.