The group agreed in early October to cut its oil production target by 2 million bpd from November until the end of 2023.
Given production restraints on some members of the alliance, the actual cut the group is expected to deliver is closer to between 1 million and 1.1 million bpd.
"A further cut in production cannot ... be ruled out," PVM Oil analyst Stephen Brennock said.
"Failure to do so risks sparking another selling frenzy," he added, without saying how low he thought prices could go.
Amrita Sen, co-founder of consultancy Energy Aspects, told bank Jefferies that she did not expect OPEC+ to change tack yet.