Oil, gas discovered in deepwater pre-salt offshore Angola

Posted on 01 May 2014

The Angolan National Concessionaire Sonangol, Cobalt and the Block 20 partners – Sonangol Pesquisa e Produção and BP Exploration Angola (Kwanza Benguela) have announced the results of the drill stem test for the Orca #1 pre-salt deepwater exploration well in Block 20 offshore Angola. The well was successfully tested at a facility-constrained rate of 3,700 bbl per day of oil and 16.3 million cu ft per day of gas with minimal drawdown (approximately 1%) in the upper Sag section of the discovery.

The results of this flow test confirm that the Orca #1 well is capable of substantial sustained oil production rates. The well was drilled to a measured depth of 12,703 ft (3,872 m), and Cobalt estimates that it encountered approximately 250 ft (76 m) of net oil pay predominantly in the upper Sag interval. Results of an extensive logging, coring and fluid acquisition program in addition to the drill stem test confirm a significant discovery, which is the largest oil discovery found to date in the Kwanza Basin. Cobalt’s post drill estimates indicate a resource range of between 400 and 700 million bbl of oil.

This is Sonangol and Cobalt’s fifth deepwater pre-salt discovery offshore Angola. The Orca #1 well was drilled on a prospect previously penetrated by the Baleia #1A well in 1996; however, this well was not tested and was subsequently abandoned. The Baleia #1A well is approximately five km from the Orca #1 discovery. Cobalt, as operator, has a 40% working interest in Block 20. Partners Sonangol and BP each have a 30% working interest.

“The Orca discovery is by far the largest and most significant oil discovery to date in the Kwanza Basin and is potentially one of the largest oil fields in Angola,” said Joseph H. Bryant, Cobalt’s Chairman and CEO. “We are very encouraged and excited by our DST results and the extraordinary flow capacity of the Orca reservoir, which gives us confidence that wells in the field will flow oil at rates equal to or greater than the rates we expect in our Cameia field. In addition, our drilling operations continue to improve, and our understanding of the Kwanza Basin reservoir systems has greatly improved by the extensive testing program that we carried out on this well. The excellent reservoir quality we encountered at Orca has positive implications on the rest of Cobalt’s vast Kwanza Basin portfolio, including our five discovered fields as well as our exploration prospects we have yet to drill.”

Cobalt also provided an update on the Cameia field in Angola. The company has commenced drilling the Cameia #3 well with first oil for Cameia anticipated in 2017, assuming project sanction in late 2014.

Also in Angola, Cobalt announced that Angola’s Ministry of Petroleum granted Cobalt and its partners a two-year extension of Cobalt’s Angola Block 9 license. Once operations are completed on the Cameia #3 well, Cobalt will commence drilling the Loengo #1 exploration well on Block 9.

Leave a Reply

*

FEATURED MICROSITES


Recent Drilling News

  • 01 August 2014

    Fugro’s real-time helideck monitoring aids operational planning, safety

    Fugro has developed and delivered a new fully integrated helideck monitoring system to Diamond Offshore’s Ocean Guardian in the North Sea. Severe...

  • 31 July 2014

    Eni discovers gas and condensates offshore Gabon

    Eni has made a gas and condensates discovery in the Nyonie Deep exploration prospect in block D4, approximately 13 km offshore Gabon and 50 km from the capital city Libreville...

  • 31 July 2014

    Blue Ocean Technologies: Subsea well intervention completed in 6,700- ft record depth

    Blue Ocean Technologies has set multiple records in subsea well intervention by intervening in, and subsequently plugging and abandoning, a production gas...

  • 30 July 2014

    Fugro’s DeepData pod provides data for deepwater riser monitoring

    Fugro has delivered a motion dataset from the BOP stack and lower riser of two deepwater wells in the Barents Sea using its DeepData pods. The DeepData pods...

  • 28 July 2014

    SDI completes 500th MagTraC MWD Ranging project

    Scientific Drilling International (SDI) has completed the 500th MagTraC MWD Ranging project. MagTraC was introduced in 1998 to target challenging applications...

  • Read more news