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Development of the Gbetiokun oilfield signals the next material phase of production growth in OML 40

Upon completion of Opuama-11 drilling operations, the OES Teamwork Rig mobilised to the Gbetiokun field where it will re-enter the Gbetiokun-1 well and drill the Gbetiokun-3 well as part of the initial phase of the field development.


  • Type: Oil reserve
  • Discovered: 1987
  • Gross 2P: 38.0 mmbbls
  • Location: 63km NW of Warri 
  • Reservoir Depth: 4,500–10,000ft
  • Distance from Opuama Flowstation: 27km to the South East

Gbetiokun is located on the boundary of OML 40 and OML 49, which is operated by Chevron. The field is known as Gbetiokun in OML 40; the extension of the field in OML 49 is called Bime. The field was discovered by well Gbetiokun-1 in 1987 and presently four wells have been drilled on the structure (two in OML 40 and two in OML 49).

The latest appraisal well Gbetiokun 2 was drilled in August 1991 on the western flank of the field where it found a significant number of reservoirs containing hydrocarbons. NSAI provided a Competent Person's Report (CPR) for Gbetiokun-1 in April 2016 which has gross 2P oil reserves of 10.8 million barrels (mmbbls). In 2017 NSAI provided a CPR for Gbetiokun field which has gross 2P reserves of 38.0 mmbbls.

Reservoir characteristics

A total of 20 hydrocarbon reservoirs have been identified in the Gbetiokun field. The crude is generally characterised as having a low viscosity, high API gravities from 39°-41° and also being under-saturated. PVT analysis taken in the discovery well indicated the presence of good quality oil. The reservoirs are similar to those found in Opuama and it is considered very likely that they will have moderate to strong aquifer drive.


Detailed geological studies, supplemented with development studies, resulted in a Field Development Plan (FDP). The field is planned to be produced through an early production facility which contains equipment needed for oil treatment, pumping and gas compression. A 30km wet crude export pipeline is planned to join the Opuama-Otumara export pipeline system, with barging as an alternative export option. 


Eland’s best estimate of gross reserves is 60 MMstb, with up to 15 MMstb of Contingent Resources in shallow reservoirs. NSAI* assesses gross reserves at 21.5 MMstb (1P) – 38 MMstb (2P) – 53.8 MMstb (3P), with 2.6 MMstb of gross 2C contingent resources in shallow reservoirs. Initial production rates of 8,000 (3,600 net) bopd are anticipated from Gbetiokun-1.

* NSAI CPR of December 2017

p30 Gbet cross section.png
West-east cross-section through Gbetiokun showing stacked, oil-bearing, reservoirs. (The y-axis shows depth in feet. Only the interval below 7,600 feet is shown.)
Dip seismic section across the Gbetiokun structure, through the Gbetiokun-1 discovery well. The location of the seismic line is shown in black on the inset map.