Saudi Arabian Oil Minister Ahmed Zaki Yamani said here yesterday he doubted the Organization of Petroleum Exporting Countries would restore a uniform pricing system for crude oil.

Arriving here for the semiannual OPEC strategy meeting, Yamani said, "We are prepared to do anything possible to achieve that goal," but added that he had "no offer at this time" to present to the meeting.

The 13-nation OPEC abandoned a unified price in 1979 as a result of falling Iranian oil production after the fall of the shah. Prices now range from the Saudi's $28 a barrel to almost $40 charged by some North African producers.

There was speculation among oil industry observers that Yamani, at Monday's meeting, might offer to raise the low-priced Saudi crude and trim production in the interest of moving toward price uniformity.

Yamani also said OPEC is "happy" about the congressional defeat of President's Carter's oil import tax, because "we are against any taxes to be imposed on the consumer."

Iraqi Oil Minister Tayeh Abdel Kerim said the Western nations stockpiling of the 1 million-barrel-a-day production surplus has created artificial demand and hampered moderate OPEC nation's efforts to stabilize prices.