UPDATE 1-E.ON's Huntington field output limited by access to pipeline
* Huntington oilfield producing at 40 pct capacity-partner
* Field partner cites constraints with BP's CATS pipeline
* BP says investigating fluid composition issue
OSLO/LONDON, Oct 21 (Reuters) - The North Sea Huntington oilfield in waters off Britain is producing at only about 40 percent of capacity due to problems in using a pipeline operated by energy major BP, a partner in the field said on Monday.
Norwegian oil firm Noreco said it was unclear when output at the small field, which is operated by German utility E.ON, could be ramped up.
Noreco's share of Huntington's production was 3,391 barrels of oil equivalent per day in September. This would bring Huntington's total output to some 17,000 boe per day last month.
But the field has the potential to produce 40,000 boe per day, Noreco said last month.
E.ON, which also pumps some gas out of the field, must ship some of that via the CATS gas pipeline to be able to produce oil. The capacity to do so is limited, however, by constraints on the pipeline, Noreco said.
Noreco holds a 20 percent stake in the field, E.ON 25 percent. Britain's Premier Oil has a 40 percent stake and Canada's Iona Energy 15 percent. Continued...