RIYADH: Oil prices fell on Wednesday as an unexpected build in crude and fuel inventories in the US, the world’s biggest oil consumer, and economic uncertainty reignited demand worries. US West Texas Intermediate crude futures decreased by 68 cents, or 0.91 percent, to $74.44 a barrel at 09.15 a.m. Saudi time, while Brent crude futures fell by 66 cents, or 0.82 percent, at