LONDON, Dec 29 (Reuters) - Benchmark northwest European gasoline barge refining margins rose to just above $12 per barrel on Wednesday, supported by an unexpected fall in U.S. inventories. U.S. gasoline stocks (USOILG=ECI) fell by 1.5 million barrels last week to 222.66 million barrels, compared with analysts" expectations in a Reuters poll for a 0.5 million-barrel rise, Energy Information Administration data showed on Wednesday. U.S. oil refiners are expected to have 302,000 barrels per day (bpd) of capacity offline for the week ending Dec. 31, increasing available refining capacity by 6,000 bpd, research company IIR Energy said on Wednesday.​ Gasoline (in tonnes) Trades (vol.) Bids Offers Prev. Trades Sellers Buyers Ebob Barges MOC Platts E5 $759 BP Varo Ebob Barges E10 Platts(fob ARA) Ebob Barges Argus E5(fob AR) $737.25 (7KT) $714.75 (4KT) Litasco, Vitol BP, Mabanaft Ebob Barges E10 Argus (fob AR) $749.25 (9KT) Shell, Totsa Varo, BMV Jan swap fob ARA $731.25 $711.75 Premium Unleaded (fob ARA) $752-$752 $732 - $733 Cargoes $737(Vasiliko) Cargoes (cif NWE) Naphtha Ebob crack (per barrel) $12.185 prev. $10.085 Brent futures Rbob Rbob crack