Clov lifts Total production to 35% of Angola's total
The fields will raise Total's operated production to more than 0.7 million b/d
Total’s four-field Clov development off Angola came on stream in June, cementing the company’s position as the country’s largest operator. Production from the deep-water development, covering the Cravo, Lirio, Orquidea and Violeta fields, is due to build up to 160,000 barrels a day (b/d) over coming months, raising Total’s operated production to more than 0.7 million b/d – over 35% of the country’s total.
Clov uses an innovative seabed architecture designed to reduce the cost of the development – which, earlier in the planning process, the company had viewed as uneconomic following increases in supply-chain costs. A redesign introduced a single seabed production ring, instead of the planned dual production loops, and gas-injection was removed from the scheme. Gas is due to be landed to the troubled liquefied natural gas complex at Soyo, although this will be out of service for repairs until mid-2015.
The four fields, lying in water 1,100-1,400 metres deep and 140 km offshore from Luanda, hold proven and probable reserves of 500m barrels. They extend over an area of 25 km by 29 km, the large area calling for 180 km of seabed pipelines to link-up the eight manifolds to three riser towers. There are 34 wells – 19 producers and 15 water-injectors.
Because the oil is of two different qualities – light 32-35°API crude at Cravo and Lirio and heavy 20-30°API crude at Orquidea and Violeta – Total is using multiphase pumps to lift the heavy crude to the floating production, storage and offloading (FPSO) vessel, although the two streams are then mixed and processed in a single train. The FPSO, with 1.8m barrels of storage capacity, is all-electric, with only the minimum amount of electricity produced to operate facilities.
Total says the Clov development was completed within the original budget of “around $7 billion”, although costs are understood to have been raised by the authorities’ requirement for the maximum amount of work to be carried out in Angola. Clov is said to have the largest local content of any Angolan project, with more than 10m man-hours of work completed in the country, mainly in fitting-out the FPSO. Some 7,500 tonnes of facilities including a 2,300 tonnes water-treatment module were fabricated at the Paenal yard at Porto Amboim, which had to be modified to allow the FPSO to moor.
Clov is the fourth development – after Girassol, Dalia and Pazflor – in Block 17, and brings the fourth FPSO to the block. Total said production from Clov will lift the block’s output to 0.7m b/d, making it the firm’s most prolific production site worldwide. Last year its equity production in Angola – mostly from Block 17 and the Chevron-operated Blocks 0 and 14 – ran at 186,000 b/d of oil-equivalent. Interests in Block 17 are Total, 40.0%, Statoil, 23.33%, ExxonMobil, 20.0% and BP, 16.67%.
In April, Total gave the go-ahead for its Kaombo development in Block 32, where it will spend $16bn to achieve a production of 230,000 b/d.