* OPEC agrees to keep oil supply unchanged
* Communique to call for compliance with existing quotas
* Dollar at highest in two months vs yen but down vs basket
* Reuters poll sees lower U.S. crude, distillate stocks (Updates with prices, detail, comment)
By Christopher Johnson
LONDON, Dec 22 (Reuters) - Oil slipped to around $73 per barrel on Tuesday after OPEC agreed to roll over its production targets and ahead of data expected to show a fall in crude and distillate inventories in the United States.
OPEC oil ministers, content with oil prices, agreed to leave output unchanged and meet again on March 17. [
]The Organization of the Petroleum Exporting Countries pumps about 50 percent of the world's oil exports and has seen crude prices almost double since the start of the year after it sliced output when recession hit fuel demand.
The deal leaves the implied target for OPEC output, excluding Iraq, at 24.84 million barrels per day (bpd). [
]But oil traders and analysts are worried that OPEC members are not sticking to their production targets and that output is rising steadily. [
]The new front-month February contract for U.S. crude futures <CLc1> fell 76 cents to $72.96 a barrel by 1258 GMT. The January contract expired on Monday down 89 cents at $72.47, pressured by the stronger dollar.
London Brent crude for February <LCOc1> fell 66 cents to $72.33, slipping below U.S. crude for the first time in a month.
"Obviously, everyone in the market has expected this result and it is absolutely no surprise," said Mike Wittner, Global head of oil research at Societe Generale in London.
"UPSIDE CREEP"
"But there is some reason for concern because if you look at the numbers, the upside creep in production each month is considerable. At this point, compared to the low point in February-April, OPEC output is about 1 million bpd higher than it was. So although we are bullish going forward, OPEC really does need to address compliance."
Libya's OPEC delegation Shokri Ghanem said the final communique from the OPEC meeting would call for compliance with existing output restrictions: "It says that member countries want compliance and the secretariat will monitor it."
Edward Meir, senior commodity analyst at brokers MF Global, said the oil market was likely to slip lower.
"We suspect the ensuing price bias will be to the downside. In the least, participants may be unnerved by OPEC's continuing refusal to tighten export quotas," he said.
"In fact, given energy's bearish fundamentals, the cartel is lucky prices are not lower than they actually are," Meir added, citing recent weakness of the dollar, "investor infatuation with commodities, and a return of fund money to the commodity space".
The dollar rose to a two-month high against the yen as investors unwound positions before the year-end, but the U.S. currency eased against a currency basket after nearing a high of more than three months on Monday. [
] <.DXY>Oil prices received some support from expectations that U.S. crude stocks had fallen by 1.6 million barrels last week, as refiners drew down inventories for year-end tax issues.
A Reuters poll said the drop would follow declines of more than 3 million barrels in the previous two weeks. [
]Distillate stocks, which include heating oil and diesel, were expected to be down 2.1 million barrels as last week's cold and snow boosted heating oil demand in the U.S. Northeast, the poll showed ahead of the release of the weekly American Petroleum Institute report at 4:30 p.m. EST (2130 GMT).
Data from the government Energy Information Agency (EIA) will be released on Wednesday.
Also supportive was a forecast of colder-than-normal weather across much of the United States from January to March by private forecaster WSI in its latest outlook. [
]For a factbox of U.S. weather forecasts, click [
]But despite cold weather and the expected fall in U.S. distillates stocks last week, heating fuel stockpiles are still above year-ago levels. According to the International Energy Agency, almost 100 million barrels of distillates were stored on ships at sea at the end of November. (Editing by Anthony Barker)