Tchatamba Complex Oil Fields

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Gabon Oil & Gas Fields

Perenco Oil & Gas Fields

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Summary Information

  • Operator: Perenco
  • Country: Gabon
  • Location: Kowe permit located 20 miles offshore
  • Production start: 1998
  • Partners: ONE
  • Type: Oil
  • Estimated Reserves:
  • Production Volume:


  • The Kowe Block, approximately 20 km offshore Gabon with a water depth of 100m, contains three fields, Tchatamba South, Tchatamba Marin and Tchatamba West, together the `Tchatamba Complex`.
  • There are 3 platforms called Tchatamba-A (MOPU), Tchatamba South and the Tchatamba West
  • Until 2003, the MADIELA FSO was utilised
  • All crude produced is blended as part of Rabi Light Crude Oil


  • Modec: Supply of FSO & MOPU
  • Stolt Offshore: Tchatamba West pipeline installation
  • ETPM: Tchatamba South pipeline installation


  • 1997 - Tchatamba West discovered
  • 1998 - First oil produced
  • 1999 - Tchatamba South started producing
  • 2000 - First production from Tchatamba West
  • 2003 - A permanent pipeline was constructed directly to the onshore Cap Lopez terminal
  • 2007 - ONE acquired a stake from Devon Energy
  • 2009 - Perenco acquired Marathon's stake


  • Production in all three fields is from the Lower Cretaceous Madiela reservoir, consisting of high permeable quartz and carbonate shallow marine sands.
  • In addition the largest field, Tchatamba South also produces from the Upper Cretaceous Cap Lopez and Azile reservoirs.


  1. ONE Kowe
  2. Serimax Pipeline References
  3. Marathon Announces Start of Production From Tchatamba South
  4. Marathon Flows First Oil From Tchatamba West; Third Gabon Field on Stream
  5. Devon Energy to Sell Assets in Gabon for $205.5 Million

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