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. 

DateBuzzardForties Blend unstabilised crude oil (thousands of barrels per day)
July 18 32.7% 399.5
August 18 34% 299.1
September 18 33.1% 418.0
October 18 32.1% 433.5

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 % volAPISul (%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 2018 is shown below:

 Week No. Actual % Buzzard
1Q 2018 1 1 January to 7 January 32%
  2 8 January to 14 January 26%
  3 15 January to 21 January 33% 
  4 22 January to 28 January 34%
  5 29 January to 4 February 29%
  6 5 February to 11 February 33%
  7 12 February to 18 February 31%
  8 19 February to 25 February 30%
  9 26 February to 4 March 29%
  10 5 March to 11 March 33%
  11 12 March to 18 March 32%
  12 19 March to 25 March 32%
  13 26 March to 1 April 30%
2Q 2018 14 2 April to 8 April 32%
  15 9 April to 15 April 32%
  16 16 April to 22 April 31%
  17 23 April to 29 April 29%
  18 30 April to 6 May 31%
  19 7 May to 13 May 29%
  20 14 May to 20 May 28%
  21 21 May to 27 May 31%
  22 28 May to 3 June 31%
  23 4 June to 10 June 35%
  24 11 June to 17 June 30%
  25 18 June to 24 June 30%
  26 25 June to 1 July 33%
3Q 2018 27 2 July to 8 July 32%
  28 9 July to 15 July 32%
  29 16 July to 22 July  

FPS will endeavour to update the above information on a weekly basis. To view previous quarters for 2010 to 2017 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 2018 summer field and FPS TAR (turnaround) 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 during June 2018.  As new forecasts are provided by FPS shippers, we will update the projected Forties Blend quality information.

As individual platforms come back on line trough 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.