ANGOLA - CLOV
June 2014. CLOV, the fourth deepwater development project in Block 17, came on stream. The name chosen for the field was actually an acronym of its four component reservoirs: Cravo, Lirio, Orquidea and Violeta. With first oil at CLOV, Total E&P Angola maintained its position as Angola’s leading producer, averaging 700,000 barrels a day.
The oil in the CLOV reservoirs, like that at Pazflor, has a range of profiles and dates from either the Oligocene or Miocene epochs. As before, a subsea multiphase pump system was used at CLOV to enhance the oil recovery process. With reserves estimated at 505 million barrels over 20 years, CLOV has a key role to play in ensuring long-term production at Block 17.
As with Girassol, Dalia and Pazflor, CLOV required the use of a new FPSO, which provided the opportunity for a range of innovations. The HSE performance during construction of the FPSO and its facilities has yet to be matched: 16 million hours worked without an injury at the DSME shipyard in Okpo and the Paenal site in Porto Amboim. Progress was also made in the area of local content, which rose to 20% of the total contract value: 64,000 tons of equipment was assembled in Angola, of which 40,000 tons was manufactured in the country as well, representing more than 10 million work hours. The CLOV project therefore attests to Total E&P Angola’s long-term strategy. CLOV broke new ground in operating terms, too, since all of the associated gas will be sent to the Angola LNG liquefaction plant in Soyo.
The Paenal shipyard was substantially enlarged in order to meet the demands posed by CLOV: the dock was extended to accommodate a 305-meter FPSO, workshops were added and a high-capacity crane was constructed to allow for the first-ever installation of a locally manufactured module on an FPSO.
Angoflex’s production capacity more than doubled, notably thanks to the construction of two new conveyors for manufacturing 80 kilometers of umbilicals.
CLOV at a Glance
- Location: 140 kilometers off the Angolan coast, northwest of Luanda.
- Type of oil:
- Oligocene oil: 75% of production.
- Miocene oil: 25% of production.
- Area: 381 square kilometers.
- Water depth: 1,100 to 1,400 meters.
- Proved reserves: 505 million barrels over 20 years.
- Surface facilities:
- A floating production, storage and offloading (FPSO) vessels
- An offloading buoy located 1.8 kilometers from the FPSO.
- Subsea installations:
- 34 wells, including 19 producers and 15 water injectors.
- 8 manifolds
- One network of subsea pipelines:
- One multiphase pump system.Eight manifolds.
- 38 kilometers of flow lines.
- 57 kilometers of water injection lines.
- 32 kilometers of gas export lines.
- 84 kilometers of umbilicals.
- July 2010: The performance phase begins with the awarding of the major contracts.
- June 2011: Construction of the FPSO components begins at the Paenal shipyard in Angola.
- July 2011: Construction of the FPSO’s hull begins at the DSME shipyard in Okpo, South Korea.
- August 2012: Drilling begins.
- November 2012: The offshore installation campaign gets underway.
- August 2013: The FPSO leaves South Korea, headed for the Paenal shipyard.
- November 2013: The FPSO arrives at Paenal.
- June 2014: Production begins.
- Third-quarter 2016: Drilling ends.
Kicking off the CLOV project in 2010.
From left to right: Jacques Marraud des Grottes, Senior Vice President, E&P Africa, Total; Yves-Louis Darricarrère, President, Exploration & Production, Total; Geneviève Mouillerat, CLOV Project Director; Sebastião Gaspar Martins, Member of the Board of Directors, Sonangol; and Philippe Chalon, CEO, Total E&P Angola.
CLOV: The New FPSO
- Length: 305 meters.
- Width: 61 meters.
- Weight: 120,000 tons.
- Production capacity: 160,000 barrels/day.
- Water injection capacity: 319,000 barrels/day.
- Storage capacity: 1.78 million barrels.
- Gas compression capacity: 6.5 million cubic meters/day.
- Maximum number of crew members: 240.
Although it is not the largest of the four FPSOs in operation on Block 17, CLOV is remarkable nonetheless for the technological innovations on display. In addition to its state-of-the-art, all-electric design, CLOV boasts compact water treatment units that combine two technologies (ultrafiltration and deoxygenation) and an oil/water separation process positioned in the hull to reduce the weight of the modules located on the upper deck.
Paenal: A Symbol of Growth at Angola’s Shipyards
Located 250 kilometers south of Luanda, the Porto Amboim Estaleiros Navais (Paenal) shipyard is emblematic of CLOV’s local content, as its expansion has been especially impressive. The dock was lengthened from 80 meters to more than 400 meters, while the site’s rotary crane with a lifting capacity of 2,500 tons – the most powerful in Africa – was the first to be used to install locally manufactured modules on an FPSO. The yard also includes production workshops equipped with traveling cranes, hangars, oﬃce space, a company restaurant and even a clinic. The result is that Paenal can provide two million work hours annually. But other shipyards, such as the one at Lobito, were also instrumental in fulfilling the ambitious project objectives. The Sonamet site, for example, produced 60% of the assembly comprising the flow lines and water injection lines, risers and buoy. Sonamet also built seven of the eight manifolds for the subsea production system, while a large portion of the Christmas trees were assembled and tested at the Sonils site in Luanda. These successes are a testament to Angola’s industrial base and its ability to manufacture equipment that complies with Total’s stringent quality and safety standards.