Following the supply cut deal by the Organisation of Petroleum Exporting Countries, OPEC, oil output of member-states is set to fall by more than 1 million barrels per day (bpd) in January.

According to the report of a Reuters survey released Tuesday, the fall points to a strong start by the group in implementing its first supply cut deal in eight years.

The survey is based on shipping data provided by external sources, Thomson Reuters flows data and information provided by sources at oil companies, OPEC and consulting firms.

The Organisation of the Petroleum Exporting Countries agreed to cut its output by about 1.2 million bpd from January‎ 1 to prop up oil prices and reduce a supply glut.

The survey stated that supply from the 11 OPEC members with production targets under the deal has averaged 30.01 million bpd, down from 31.17 million bpd in December, based on shipping data and information from industry sources.

Compared with the levels that the countries agreed to make the reductions from, OPEC members have cut production by 958,000 bpd of the pledged 1.164 million bpd, equating to 82 percent compliance, the survey says.

It stated further that compliance of 80 per cent comfortably exceeds the initial 60 per cent achieved when the previous cuts deal was implemented in 2009, and it adds to indications that adherence to the deal so far has been high.

Reuters reports that oil edged above $55 a barrel on Tuesday. The cuts agreed by OPEC, Russia and other independent producers has helped to lift prices from a 12-year low near $27 a year ago.

The January drop in OPEC output has been offset slightly by higher supply from Libya and Nigeria, which are both exempted from the OPEC agreement because of output losses caused by conflict.

Saudi Arabia has reduced output to less than 10 million bpd in January, industry sources told Reuters, implementing a bigger cut than it had agreed to set a good example on compliance.

Iran, which was allowed to raise output under the OPEC deal because sanctions had crippled past supply, pumped an additional 20,000 bpd.

OPEC announced a production target of 32.5 million bpd at its November 30 meeting, which was based on low figures for Libya and Nigeria and included Indonesia, which has since left the group.

Combined output in January from all members is about 520,000 bpd above the target, adjusted to remove Indonesia, the survey showed.