WORLD oil prices rose yesterday as Organisation of Petroleum Exporting

Countries ministers reached agreement in Geneva on an overall oil output

ceiling for the last three months of this year.

But prices retreated from their highs as the ministers continued talks

on how to allocate individual production quotas.

Opec secretary-general Subroto of Indonesia said ministers had agreed

to set the ceiling at 24,500,000 barrels per day (bpd), 900,000 above

the current 23,600,000 limit, but a bit less than what independent

monitors say Opec is currently producing.

''Opec has agreed the size of the pie but not how to divide it up.

There's still a long way to go,'' an oil broker in London said. November

futures for world benchmark crude oil Brent Blend peaked at $16.77 a

barrel in the morning, up 48 cents on the day, before drifting back to

$16.48.

Analysts said it would not be easy to get individual quotas right.

Kuwaiti Oil Minister Ali Ahmed al-Baghli said a quota for his country of

1,900,000 bpd ''would be out of the question''.

Oil prices began their climb soon after markets opened when an Iranian

delegate said that bilateral talks with Saudi Arabia had been good.

They gained a further boost after a dramatic phone call between Saudi

King Fahd and Iranian President Akbar Hashemi Rafsanjani seemed to give

impetus to the apparently deadlocked talks.

Oil ministers Hisham Nazer of Saudi Arabia and Gholamreza Aqazadeh of

Iran, long at odds in Opec over competing claims for market share,

breakfasted in Nazer's Geneva hotel suite. Then Opec agreed the new

ceiling.

The agreement implied that the Saudis and one or two others might

forego most if not all of a proportional quota rise. Those barrels would

be used to try to meet Kuwait's demand for a big increase as the price

of its return to a quota system.

It seemed that it might also be possible to give Iran a slightly

disproportionate increase. At any event, Saudi Arabia would be ceding

some percentage share of the Opec total.

The conversation about oil was reported on Teheran radio.

Subroto said it ''set the stage'' for yesterday''s accord on where to

fix a new Opec ceiling effective October 1.

Iran's Aqazadeh said the decision on the ceiling had only ended ''part

one'' of the Opec talks.

''Opec now has a ceiling but no walls,'' said Nauman Barakat,

vice-president for energy futures at Merrill Lynch who is in Geneva to

monitor the Opec meeting.

But he added that the Saudi initiative for mediators to shop around

among big producers for contributed barrels at least meant that ''they

have got an architect to design some''.