SINGAPORE (March 21): Oil prices rose on Tuesday on expectations that an OPEC-led production cut to prop up the market could be extended, while strong demand would also work to slowly erode a global fuel supply overhang.

Prices for front-month Brent crude futures, the international benchmark for oil, were at US$51.97 per barrel at 0746 GMT, up 35 US cents, or 0.68%, from their last close.

US West Texas Intermediate (WTI) crude futures were up 28 US cents, or 0.58%, at US$48.50 a barrel.

The Organization of the Petroleum Exporting Countries (OPEC), together with other producers including Russia, has pledged to cut its output by almost 1.8 million barrels per day (bpd) between January and June in an effort to prop up prices and rein in a global supply glut that has dogged markets for almost three years.

Yet so far the cutback has not had the desired effect as compliance by involved exporters is patchy and as other producers, including the United States, have stepped up to fill the gap, resulting in crude prices falling more than 10% since the beginning of the year.

To halt the decline, OPEC members increasingly favour extending the pact beyond June to balance the market, sources within the group said, although they added that this would require non-OPEC members like Russia to also step up their efforts.

One threat for OPEC is that other producers will fill the gap its production cuts leave.

With OPEC cutting but US production rising, the premium of Brent crude over US WTI has risen to around US$3.5 per barrel, its highest since early 2016, potentially opening the opportunity for US oil sales to Asia, traders said.

Eventually, however, traders said that healthy oil demand would help rebalance markets.

"Global demand for 2017 is expected to remain healthy and surpass long-term average growth in demand of 1.2 million barrels per day by between 0.2 and 0.4 million barrels per day. As such, the combination of robust demand and weaker global supply leading to rebalanced markets will not be de-railed by US shale oil," said Jeremy Baker, senior commodity strategist at Vontobel Asset Management.

Traders said that US crude storage data, due to be published later on Tuesday by the American Petroleum Institute (API), would likely be the next significant price driver.