Deepwater development The ultimate frontier - Total.com

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Production, Storage and offloading vessel) – one of the largest ever built.
This network, which transports the fluids from the seafloor to the surface,
is more than 53 kilometers long. in addition, there are two other networks:
one for water injection, one for gas injection. four flexible risers, each
1,650 meters long, reinject treated produced water and treated seawater
into the reservoirs, along 35 kilometers of injection lines that feed into
31 water injection wells — a daily injection capacity of 405,000 barrels
of water. The associated gas produced along with the oil is reinjected into
the reservoirs via two flexible risers connected to two injection lines
and three gas injection wells, adding up to a subsea gas injection system
more than 13 kilometers long, with a compression capacity of up to 8 million
cubic meters of gas per day.
a 75-kilometer network of umbilicals transmits the data from a continuous
monitoring and control system that will coordinate production and allow
this sprawling subsea complex to ramp up to a plateau of 240,000 barrels
of oil per day by 2007. Production is exported to a loading buoy moored
2,100 meters from the fPSo.
NeW teChNOLOGiCaL BreaKthrOuGhs
The many challenges of producing such difficult reserves in such an
extreme environment and under economically viable conditions demanded
a series of innovations. for the first time on this scale, the drilling and well
completion concepts deployed on Dalia combined the technology
of horizontal subsea Christmas trees with light well architecture.
With each manifold designed to connect up to six wells, installing
the seabed equipment, with remote guidance from the surface, demanded
high-precision: subsea flowlines and connections had to be installed in
a congested zone under 1,400 meters of water. above all, thermal issues
called on the Group’s full range of leading-edge expertise and inspired
a number of new developments to meet the challenges of flow assurance
for Dalia’s inherently cold and heavy oil in such severe pressure and
temperature conditions. advances include the largest flexible production
risers ever built — the first using integrated Production Bundle technology
— as well as an insulation system for the flowlines that ranks as one
of the most efficient worldwide. nnn
1. The Dalia field development
scheme on Block 17, angola.
2. The Dalia fPSo vessel is
300 meters long and 60 meters
wide, with accommodations
for up to 190 people.
Dalia milestones
September 1997:
Discovery of the Dalia field.
April 2003: Launch of
the Dalia project.
January 2004: Beginning
of FPSO hull construction.
June 2004: Start of FPSO
topsides fabrication.
August 2004: Launch
of the FPSO hull in Korea.
February 2005: Start of the
drilling campaign and shipment
of the first two subsea Christmas
trees from Norway to Angola.
May 2005: Start of topsides
installation on FPSO hull.
September 2005:
First IPB risers shipped
from France to Angola.
December 2005: Start
of offshore installation work.
September 2006: Arrival
of FPSO in Angola.
December 2006: First oil
on the Dalia field.