The information provided herein is for information only and does not affect the rights or obligations of any party pursuant to applicable FPS Transportation and Processing Agreements or other agreements. The information provided herein is given in good faith but its accuracy is not warranted and INEOS FPS Limited and its affiliates will have no liability to any party arising out of or in connection with the provision of such information or any party's reliance upon it regardless or any negligence or breach of duty of INEOS FPS Limited or its affiliates.

Forties Blend crude oil changed in quality at the beginning of 2007 when crude oil from the Buzzard field began production through the FPS. Although there are over seventy other fields making up Forties Blend, Buzzard is now the largest component field and it has altered the hydrocarbon characteristics of the Blend.

A detailed assay for Forties Blend is published on and can be accessed using the following link:-

Forties Blend Assay

Buzzard is a medium gravity, sour crude with an API of 32.6º and a whole crude sulphur level of 1.44% wt. Distillation of the crude produces a yield structure similar to the Urals Blend exported to North West Europe. Buzzard is sour but is not otherwise poor in quality. The acidity is low with a Total Acid Number of 0.09 mgKOH/g. The pour point is + 6 degrees C and the metals levels reasonably low at 4.8 ppm wt nickel and 13.8 ppm wt vanadium.

We have based the information in this release on Buzzard assay data provided by Nexen, the Buzzard Operator, from appraisal wells drilled some time ago. As updated Buzzard assay data may become available and when such data has been provided to INEOS, we will update the information in the release accordingly. Indications to date are that production from the Buzzard field is consistent with the original assay.

The table below shows a prediction of the proportion of Buzzard oil in Forties Blend over the following 4 months.

We have prepared this using the information provided by Field Operators which INEOS has not overviewed. We cannot guarantee the accuracy of this information but it does represent the best information made available to the FPS operator by Field Operators. 

Date Buzzard Forties Blend unstabilised crude oil (thousands of barrels per day)
July 19 31.2% 387.4
August 19 34.6% 345.0
September 19 23.0% 382.2
October 19 29.0% 417.9

FPS will endeavour to update the above information on a monthly basis. Please note that the Forties Blend is now showing unstabilised crude oil mbpd instead of stabilised crude oil, as the Buzzard % was taken in relation to unstabilised SCO.

The following table can be used to estimate the approximate properties of the Forties Blend based on the content of Buzzard Crude:

Buzzard % vol API Sul (%wt)
0% 44 0.27%
5% 43.2 0.34%
10% 42.4 0.41%
15% 41.7 0.48%
20% 41 0.55%
25% 40.3 0.62%
30% 39.6 0.68%
35% 39 0.75%
40% 38.4 0.81%
45% 37.8 0.87%
50% 37.2 0.93%
55% 36.7 0.99%
60% 36.2 1.05%

The above table has been reviewed, May 2017


The proportion of Buzzard oil entering the FPS System for 2019 is shown below:

  Week No.   Actual % Buzzard
1Q 2019 1 31 December to 6 January 30%
  2 7 January to 13 January 30%
  3 14 January to 20 January 31%
  4 21 January to 27 January 32%
  5 28 January to 3 February 30%
  6 4 February to 10 February 30%
  7 11 February to 17 February 32%
  8 18 February to 24 February 31%
  9 25 February to 3 March 30%
  10 4 March to 10 March 28%
  11 11 March to 17 March 23%
  12 18 March to 24 March 29%
  13 25 March to 31 March 29%
2Q 2019 14 1 April to 7 April 29%
  15 8 April to 14 April 29%
  16 15 April to 21 April 30%
  17 22 April to 28 April 31%
  18 29 April to 5 May 31%
  19 6 May to 12 May 29%
  20 13 May to 19 May 30%
  21 20 May to 26 May 29%
  22 27 May to 2 June 32%
  23 3 June to 9 June 32%
  24 10 June to 16 June 30%
  25 17 June to 23 June 29%
  26 24 June to 30 June 29%
3Q 2019 27 1 July to 7 July 29%
  28 8 July to 14 July 33%
  29 15 July to 21 July 31%
  30 22 July to 28 July  

FPS will endeavour to update the above information on a weekly basis. To view previous quarters for 2010 to 2018 please use the links below:


Previous 2017 Quarters (PDF 86 KB)

Previous 2016 Quarters (PDF 133 KB)

Previous 2015 Quarters (PDF 146 KB)

Previous 2014 Quarters (PDF 69 KB)

Previous 2013 Quarters (PDF 69 KB)

Previous 2012 Quarters (PDF 77 KB)

Previous 2011 Quarters (PDF 77 KB)

Previous 2010 Quarters (PDF 76 KB)

Impact on Forties Blend crude oil quality during the 2019 summer field and FPS Maintenance season

During the Summer, operators of platforms in the North Sea often take the opportunity of the favourable weather period to perform routine maintenance on their equipment.  This can result in individual fields reducing crude production or being taken off-line.  This year a number of platforms are expected to undergo planned outages mainly during July and August which will result further changes to the Blend oil quality.

The production rate from the Buzzard field is expected to vary this Summer, and a number of other fields are being taken off-line.  This will vary the percentage of Buzzard crude in the Blend and cause the Forties Blend sulphur and API gravity to fluctuate.  The charts below show the projected API gravity and sulphur levels of Forties Blend for this maintenance period.

Sulphur levels of Forties Blend:

The Forties Blend Sulphur

 The API gravity:

This data is based on the forecast production rates and qualities for fields supplied by each FPS shipper to the FPS operator.  As new forecasts are provided by FPS shippers, we will update the projected Forties Blend quality information.

As individual platforms come back on line through August and September, we expect the Forties Blend quality to revert back to a steady quality of approximately 0.65% sulphur and an API of 38.5º.