NSea Crude-Vitol seen keeping more Forties

* Vitol keeps another cargo from chains; holds on to 8

* No Forties done in window

LONDON, Nov 18 (Reuters) - Vitol kept another North Sea
Forties cargo on Wednesday, adding to its haul, while swaps
moved higher in the first four weeks of the curve, traders said.

FORTIES FOT-E

* Vitol kept the Forties cargo with parcel number F1210 from
the chains, bringing the number it has kept to eight, plus
another it holds as an equity cargo, traders said.

Traders said Vitol could be preparing to take delivery of
the Forties cargoes, possibly to put it into floating storage as
the discount for prompt physical oil is undermined by
deteriorating refining margins.

* There was no offer or bid for Forties in the window on
Wednesday, traders said. The last deal heard done was on
Tuesday, when Vitol sold Statoil a Nov 28-30 loading cargo at
dated minus 25 cents.

NORWEGIAN GRADES

* Statoil was not believed to be showing new offers on
Wednesday.

REFINING MARGINS <REF/MARGIN1>

* Complex refining margins for North Sea Brent in Rotterdam
slipped to around $2 on Wednesday, down from an average over the
past five days of $3.40, according to Reuters models.

SWAPS

* Contracts for Differences (CFDs) continued to show
contango but moved up for the first four weeks. The previous
day's values are in brackets.

23-27/11 Jan -111 (-116)

30-04/12 Jan -91 (-94)

7-11/12 Jan -74 (-76)

14-18/12 Jan -57 (-58)

21-24/12 Jan -40 (-40)

29-31/12 Jan -24 (-24)
(Reporting by Alex Lawler; Editing by Keiron Henderson)