The Unocal bid upset Chevron, which had submitted what now appears to be the winning bid for Unocal and which lobbied Congress heavily against the Cnooc bid.

• 优尼科收购事件激怒了雪佛龙公司，它已经递交了如何成功收购优尼科的材料，而且力劝国会反对中海油收购优尼科。