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 20 25.4% 355.1
August 20 27.1% 311.3
September 20 28.6% 314.1
October 20 25.2% 350.5

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, January 2020.


The proportion of Buzzard oil entering the FPS System for 2020 is shown below:

  Week No.   Actual % Buzzard
1Q 2020 1 30 December to 5 January 27%
  2 6 January to 12 January 28%
  3 13 January to 19 January 27%
  4 20 January to 26 January 27%
  5 27 January to 2 February 28%
  6 3 February to 9 February 29%
  7 10 February to 16 February 28%
  8 17 February to 23 February 29%
  9 24 February to 1 March 30%
  10 2 March to 8 March 28%
  11 9 March to 15 March 30%
  12 16 March to 22 March 30%
  13 23 March to 29 March 29%
2Q 2020 14 30 March to 5 April 15%
  15 6 April to 12 April 24%
  16 13 April to 19 April 23%
  17 20 April to 26 April 5%
  18 27 April to 3 May 28%
  19 4 May to 10 May 16%
  20 11 May to 17 May 27%
  21 18 May to 24 May 24%
  22 25 May to 31 May 27%
  23 1 June to 7 June 27%
  24 8 June to 14 June 26%
  25 15 June to 21 June 25%
  26 22 June to 28 June 26%
3Q 2020 27 29 June to 5 July 26%

FPS will endeavour to update the above information on a weekly basis. To view previous quarters for 2010 to 2019 please use the links below:

Previous 2019 Quarters (PDF 90 KB)


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 2020 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 August and September which will result further changes to the Blend oil quality.

The production rate from the Buzzard field is expected to vary in August, 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 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 September, we expect the Forties Blend quality to revert back to a steady quality of approximately 0.65% sulphur and an API of 41.0º.