<ul data-eligibleForWebStory="true">Concerns over Israel's strike on Iran are strengthening the oil futures curve.Front-month Brent prices surged by up to 13% alongside movement for contracts further out.The typical contango structure signaling loose balances long-term has disappeared.The spread between two nearest December Brent contracts flipped to backwardation at $2.30 per barrel.Various timespreads, including Brent's prompt spread, have rallied significantly.Oil options are very bullish due to a potential escalation in Mideast conflict, with implied volatility higher.Warren Patterson from ING Groep NV warns of potential disruptions to oil flows through the Strait of Hormuz.A significant disruption could push oil prices to $120 a barrel; Brent futures currently near $75 a barrel.