Is the world awash in crude, or just the U.S.? Record-high crude-oil supplies in the U.S. pushed the benchmark U.S. crude-oil contract, known as West Texas Intermediate, to fresh six-year lows Monday. But Brent crude, the global benchmark, is still about $7 a barrel above its own recent lows. Much of the world’s excess oil has ended up in the U.S., which has the most available on-land storage , weighing on domestic prices. At the same time, Brent prices have been boosted in recent weeks by bad weather, which hampered Iraqi exports, and concerns that violence in Libya could interrupt the country’s oil output. The two contracts are trading about $10 a barrel apart, up from zero in mid-January but down […]