Challenges lie ahead for Opec-Russia alliance

Market share: A file picture showing a worker at the central processing facility of the Rosneft-owned Priobskoye oil field in Russia. Though Putin gave his blessings to extending the oil deal, Rosneft and Lukoil PJSC have warned that if the measures drag on too long they could lose market share to rivals. — Reuters

LONDON: The Organisation of Petroleum Exporting Countries (Opec) and Russia have surprised the industry with the success of their grand alliance as oil surges to a three-year high. As the unlikely bond enters a second year, there are challenges ahead.

Here are four scenarios that could end their deal earlier than planned.