Saturday’s attack on a critical Saudi oil facility will almost certainly rock the world energy market in the short term, but it also carries disturbing long-term implications.

Ever since the dual 1970s oil crises, energy security officials have fretted about a deliberate strike on one of the critical choke points of energy production and transport. Sea lanes such as the Strait of Hormuz usually feature in such speculation. The facility in question at Abqaiq is perhaps more critical and vulnerable. The Wall Street Journal reported...