Tunisian gas output is at an 8-year low. A massive increase in protests has hit investment. Strike-hit producer Petrofac may be heading for the exit.

Strikes and local protests have been a regular feature of the Tunisian oil and gas scene since former dictator Ben Ali was overthrown in the January 2011 ‘revolution’ that kicked off the Arab Spring. In many ways Tunisia’s experiment in democracy has been an admirable success – certainly compared to its neighbors Libya...