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December 1, 2013

Cobalt confirms pre-salt discovery at Angola’s Lontra-1 well

US-based exploration and production company Cobalt International Energy has confirmed its Lontra-1 well is a pre-salt discovery off the coast of Angola.

By admin-demo

US-based exploration and production company Cobalt International Energy has confirmed its Lontra-1 well is a pre-salt discovery in Block 20, off the coast of Angola.

The company, which completed a drill stem test at Lontra, found the well produced at a stabilised flow rate of 2,500 barrels per day of condensate and 39 million cubic feet per day of gas.

The company said the flow rates were restricted by the surface test facilities on the SSV Catarina drilling rig.

The drill stem test was conducted in the high liquids content gas interval in order to acquire data on the flow capacity and fluid composition of this interval.

The well, which encountered both a high liquid content gas interval and an oil interval, was drilled to a depth of 4,195m and penetrated about 75m of net pay in its high quality reservoir section.

Cobalt chairman and chief executive officer Joseph Bryant said the company and its partners Sonangol P&P and BP are very pleased with the results of its Lontra-1 discovery.

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"While further appraisal drilling will be required to determine the ultimate size of the Lontra field, it is clear that Lontra is a discovery on a global scale," Bryant added.

"Although the field contains more gas than our pre-drill estimates, it is beneficial that Lontra is offshore near Luanda, where we believe there is a potentially large emerging market for gas. We and our partners as the Contractor Group have already begun discussions with the Concessionaire regarding the simultaneous commercialisation of both the liquids and the gas discovered in Lontra for the benefit of both Angola and the Contractor Group."

Cobalt chief exploration officer James Farnsworth said results from the Lontra well are exceptional, with excellent quality reservoirs that are better than the company expected.

"Additionally, all of the data that we have collected suggests that the well’s deliverability far exceeds the drill stem test flow rates, which were limited by the surface test equipment," Farnsworth added.

With the new site, the company drilled three exploration wells in the Kwanza pre-salt basin.

Cobalt has also moved the Petroserv SSV Catarina rig to drill the Orca #1 pre-salt exploratory well after testing Lontra#1.

Image: Lontra-1 well in Block 20 off the coast of Angola. Photo courtesy of


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