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TEN Assay
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About TEN Blend

  • Discovered in 2009 by Tweneboa-1 wildcat well, plan of development submitted in 2013 and first oil in August 2016.
  • Tullow is Field Operator with 47.18% working interest.


  • FPSO design capacity of 80kbd.


  • Good Quality, light, low sulphur, intermediate crude.
  • Low Metals (Vanadium), Nitrogen, Low TAN.

Cargo sizes

  • Standard cargo size 950 kbbls +/-5%.
  • Option to offer 650 +/-5% with prior notice.


  • TEN Blend loads from FPSO John Evans Atta Mills, a converted VLCC turret moored FPSO.
  • Storage capacity 1.7 Mbbls.
  • Flexible Logistics, terminal can accept Aframax, Suezmax and VLCC’s calling either 1st or 2nd Port.
  • Maximum 350k DWT.


  • First Cargo was in September 2016.
  • Since then, it has found a world wide customer base from Europe, China and the US East, West and Gulf Coasts.

TEN Blend properties

Whole Crude Property Units TEN Blend
API API 39.7
Sulphur WT% 0.34
Nitrogen Ppm 1,300
TAN No. mgKOH/g 0.05
Pour Point OC -18
Vanadium Ppm 2
Nickel Ppm 5
Cut (deg C) Yield % TEN Blend
Gas-500/15 WT% 2.23
Nap 15/175 WT% 29.1
Kero 175/250 WT% 14.33
Dist 250/360 WT% 19.55
VGO 360/565 WT% 22.87
VRES 565/999 WT% 11.92