Goldman Sachs raised its forecast for year-end Brent crude oil prices to $90 per barrel from $80, as a faster fuel demand recovery from Delta variant and Hurricane Ida's hit to production led to tight global supplies.

Brent futures hit a near three-year high last week as global output disruptions have forced energy companies to pull large amounts of crude out of inventories.

Oil prices were trading at $79.19 a barrel, earlier on Monday, while U.S. West Texas Intermediate (WTI) crude were at $75.08 a barrel. 

"While we have long held a bullish oil view, the current global supply-demand deficit is larger than we expected, with the recovery in global demand from the Delta impact even faster than our above-consensus forecast and with global supply remaining short of our below consensus forecasts," Goldman said in a note dated Sept. 26.

Earlier this month, the Organization of the Petroleum Exporting Countries and allies, a group known as OPEC+, agreed to stick to its decision made in July to phase out record output cuts. 

Hurricane Ida's hit to supply has more than offset OPEC+'s production ramp-up since July with non-OPEC+ and non-shale production continuing to disappoint, Goldman said.

Hurricane Ida and Nicholas, which swept through the U.S. Gulf of Mexico earlier this month, damaged platforms, pipelines and processing hubs, shutting most offshore production for weeks. 

Goldman, however, flagged a potential new virus variant, which could weigh on demand and an aggressively faster ramp-up in OPEC+ production that may soften its projected deficit, as key risks to its bullish outlook.

For 2022, the bank lowered its average forecasts for the second and fourth quarter to $80/bbl from $85/bbl as it factored in the possibility of an Iran-U.S. nuclear deal by next April.