oil futures rose thursday building on gains scored the previous session after data showed an unexpected drop in us crude inventories traders were also keeping close tabs on talks that could return iran to an international nuclear accord freeing up oil exports tensions around ukraine also remained in focus   west texas intermediate crude for march delivery cl1 cl00 clh22 rose 104 or 11 to 9070 a barrel on the new york mercantile exchange   april brent crude brn00 brnj22 the global benchmark rose 86 cents or 09 to 9241 a barrel on ice futures europe   march gasoline rbh22 rose 11 to 26814 a gallon while march heating oil hoh22 was up 04 at 28357 a gallon crude earlier this week pulled back from sevenyear highs as investors focused on signs of progress in talks aimed at returning iran to the nuclear agreement the trump administration pulled the us out of the deal in 2018 reimposing sanctions on iranian crude exports analysts have estimated iran could return around 1 million barrels a day of crude to the market within a year of an agreement but obstacles to a renewed deal remain and even if an agreement were reached iran wouldn’t be able to return crude to the market “at the stroke of a pen” said helima croft head of global commodity strategy at rbc capital markets in a note that means “washington will have to push on alternative fronts to try to get nearterm price relief especially if the ukrainerussia standoff intensifies” croft wrote president joe biden and king salman of saudi arabia on tuesday discussed energy supplies and rising fuel prices as well as developments in the middle east in a wednesday phone call according to news reports the call “is a clear indication that the kingdom will be the principal recipient of american solicitations given that it is the only country sitting on significant spare capacity” croft wrote “we believe the energy request will be part of a broader conversation about the bilateral relationship between washington and riyadh” traders kept an eye on developments around ukraine russian troops began joint drills in belarus underlining worries about a military buildup near ukraine that has fueled western fears of an invasion oil futures remained higher after the organization of the petroleum exporting countries in its monthly report left its forecast for oildemand growth in 2022 unchanged at 42 million barrels a day