If Saudi Arabia wants OPEC and its allies to agree to lower oil output, it will likely have to do "a lot of the heavy-lifting," one oil watcher has told CNBC.

OPEC is pushing for possible production cuts at its meeting in Vienna on Thursday and Friday. Prices have struggled following the global outbreak of the new coronavirus, which caused demand for crude to fall.

OPEC's top producer Saudi Arabia is hoping for a significant cut. The 14-member group decided on Thursday to cut production by 1.5 million barrels per day (bpd) through the second quarter of the year. But non-OPEC leader Russia is still yet to agree to the effort.

"There's no guarantee that they're going to be able to get a deal," Herman Wang, S&P Global Platts' Middle East and OPEC managing editor, told CNBC's "Capital Connection" Thursday.

"Likely, if Saudi Arabia wants a deal, they're going to have to do a lot of the heavy-lifting themselves."