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  • Leads identification offshore Gambia reveals continuation of oil discovery trend from Senegal
    édité le 20/08/2015 - Plus de news de "Spectrum TGS" - Voir la fiche entreprise de "Spectrum TGS"


Leads identification offshore Gambia reveals continuation of oil discovery trend from Senegal
Capricorn’s recent oil discoveries (FAN-1 and SNE-1) in the deep water Senegal have generated great interest in hydrocarbon exploration in the NW African margin (the MSGBC Basin). This is an exciting new discovery as it will open the area up to a new play concept and de-risk the deep water channels and basin floor fans along the deep NW African Margin.

These two discoveries highlight clastic plays within this margin with prominently different play settings. The SNE-1 well is located on the Mesozoic shelf edge at a water depth of 1,150 m. The well discovered high quality 32° API in Albian deltaic sandstones with excellent reservoir in a 95m-gross-oil-bearing column with net oil pay zone thickness of 36 m. These Albian deltaic sandstones overlie the deeper target of the karstified and fractured Aptian carbonate platform which was the primary target; however, no hydrocarbons were encountered. The FAN-1 well was drilled further down on the slope at 1,437m of water depth and found oil ranging from 28° to 41° API in 29 m of net oil bearing reservoir of Santonian(?) turbiditic basin floor fan play. This basin floor fan stratigraphically pinches out on the Senonian Unconformity (Source: FAR Ltd, 2014).

The Senonian Unconformity is a regional unconformity and it is clearly recognized on Spectrum 2D data offshore the Gambia demonstrating in Figure 1. FAN-1 and SNE-1 analogues can be applied here in the shelf break and slope settings as seen on a seismic dip line (Figure 1). Stratigraphic pinch out play associated with structural closure shows bright amplitude reflectors representing potential basin floor fans at Santonian and younger intervals. Multiple leads within these Late Cretaceous intervals have been identified in Spectrum dataset (Figure 1 and 2) and they noticeably shows a continuation trend of Capricorn’s prospects and leads further south from offshore Senegal where the recent oil discoveries have been made. On the lower shelf of the Mesozoic platform setting, structural closures and bright amplitude reflectors within Albian interval are also recognised on Spectrum 2D data, and this is in similar setting to the SNE-1 discovery.

Therefore, this confirms that the new deep water clastic play concept also extends into the offshore the Gambia and it has been de-risked by oil discoveries in offshore Senegal.

About Spectrum

Spectrum is an established pure-play Multi-Client services company. The company was initially founded in 1986 and was listed on the OSLO Axess exchange in 2008. In 2012 this listing was transferred to the Oslo Stock Exchange (OSE).

The Spectrum Group has built on the company’s reputation as a reliable seismic service provider and serves a global clientele. The Group provides innovative Multi-Client Services and high quality Seismic Imaging from regional offices in the UK, the USA, Norway, Singapore and Australia. The Spectrum Group also includes substantial regional processing centres in Cairo and Jakarta.

The group’s corporate vision is to deliver world leading Multi-Client Services and Seismic Imaging through persistence, dedication and commitment to quality.


Origine : Communiqué Spectrum TGS

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