Saudi Arabia won’t unilaterally cut oil production as it and fellow OPEC members discuss how to cope with a possible increase in global crude output, said people familiar with the matter. This month, the Organization of the Petroleum Exporting Countries, a group of some of the world’s largest oil producers, said it would keep its output ceiling unchanged. But OPEC officials have been publicly and privately jostling over whether the group might have to throttle back—should global oil output rise significantly and threaten to weaken prices—and how to divvy up any cuts among members. For the past two years, Saudi Arabia has essentially promised to steady markets no matter what fractious OPEC delegates decide. Saudi ministers walked out of an OPEC meeting in 2011 after members failed to agree to raise the group’s collective output to help make up for lost global output owing to civil war in Libya. […]