SUBSEA SYSTEMS Sarah Parker Musarra • Houston
Reuse of infrastructure
‘essential’ to Statoil PDOs
Statoil and its partners have submitted the
plan for development and operation (PDO) of
the Byrding (previously Astero) oil and gas discovery in the North Sea to government authorities. In using existing subsea infrastructure from
another development, Statoil and its partners
have found a way to make the project profitable.
The development includes a duo-lateral well
drilled from the existing Fram H-Nord subsea template through which oil and gas from
Byrding will flow to Troll C. Oil and gas will be
piped from there through existing pipelines to
Mongstad and Kollsnes, respectively.
Production is expected to start in 3Q 2017
and remain onstream for eight- 10 years. In the
peak period in 2017/2018, Byrding is expected
to produce almost 8,000 boe/d. Recoverable
volumes are projected at 11 MMboe. Capex is
estimated at NOK 1 billion ($122 million).
Torger Rød, Statoil’s senior vice president
for project development, said: “Combined with
the use of an available well slot in an existing
subsea template this reduces the costs of the
project substantially. The project is profitable
also in the current oil price environment.”
Discovered in 2005, Byrding is north of the
Fram field in 360 m ( 1,181 ft) of water. Statoil
says it will add new profitable volumes from
the Troll/Fram area, boosting the activity
and production on the Troll C platform.
A few weeks prior, Statoil submitted a PDO
for the Utgard gas and condensate discovery
in the North Sea to Norwegian and UK authorities. Once again, the operator said the
reuse of existing infrastructure was essential.
The Utgard development will include two
wells in a standard subsea concept, with one
drilling target on each side of the median
line. All installations and infrastructure being
located in the Norwegian sector, the UK well
will be drilled from the subsea template on the
Norwegian continental shelf. The distance
from the subsea template to the median line
is 450 m ( 1,476 ft). Gas and condensate will be
piped through a new pipeline to the Sleipner
field for processing. After processing the liquids will be exported to Kårstø and the dry
gas to Gassled. The Utgard gas has a high CO2
content, and will benefit from carbon cleaning
and storage at Sleipner, Statoil says.
Recoverable reserves are estimated at 56. 4
MMboe, whereas capex is projected at about
$416 million. Discovered in 1982 Utgard (
formerly Alfa Sentral) is 21 km ( 13 mi) from
the Sleipner field. Utgard straddles the UK-Norway median line, with the majority of the
reserves on the Nor wegian side.
DOF selects FMC ROVs
DOF Subsea has signed a contract with
FMC Technologies for two new remotely oper-
ated vehicles from its Schilling Robotics busi-
ness line. The HD and UHD-III ROVs are slated
for delivery in December, and will be used for
DOF Subsea’s inspection, maintenance, and re-
pair operations in Eastern Canada.
FMC Technologies said its ROV system
maintenance has comprehensive system diagnostics and intuitive maintenance solutions.
Sub-systems are designed to be quickly maintained without any requirement for advanced
technical skills or specific system knowledge.
James Fisher and Sons has acquired
Hughes Sub Surface Engineering, a diving,
subsea, and marine project specialist. The
acquisition is expected to enhance James
Fisher’s existing subsea activities. It should
also allow the group’s existing clients to
achieve further supply chain optimization
and reduce contractual interface risks, sup-
porting project mobilizations at various loca-
tions around the UK coast.
Around the same time, Subsea 7 announced
it would acquire Swagelining, a subsea polymer lining technologist.
The two companies have cooperated for
some time, designing and installing more than
150 km (93 mi) of reeled and bundled polyethylene lined water injection flowlines in the
Thomas Sunde, Subsea 7 vice president
Technology, said the duo “have a shared vision of the potential that polymer lining could
have in future subsea engineering and construction projects, with a focus on extending
the application of polymer lined flowlines.
“The acquisition of Swagelining Ltd. will
enable Subsea 7 to enhance its flowline and
riser technology portfolios, and supports
Subsea 7’s commitment to develop and apply technologies that reduce cost, enhance
production, and extend field life.” •
GE lands Indian deals
GE has recently inked two deals with two Indian giants: Oil and Natural Gas Corp.
Ltd. (ONGC) and L&T Hydrocarbon Engineering Ltd.
GE inked an exclusive memorandum of understanding (MoU) with L&T Hydrocarbon Engineering Ltd., a wholly-owned subsidiary of Larsen & Toubro (L&T). The firms
will partner in the manufacture of subsea manifolds destined for future deepwater
projects in the Krishna-Godavari basin offshore eastern India. This marks India’s entrance into local subsea equipment manufacturing. L&T’s modular fabrication facility
in Tamil Nadu was chosen as the production site, which spreads over 600,000 sq m
( 6. 5 million sq ft) and has an annual capacity of 50,000 metric tons.
Weeks later, GE Oil & Gas was awarded a multi-million-dollar frame agreement by
ONGC. Under the agreement, GE will provide an estimated 55 subsea wellheads over
next three years for the operator’s offshore drilling campaign, in shallow- to medium-waters offshore India.
The deal expands upon the two companies’ decades-long relationship. GE Oil &
Gas says it has provided the operator with subsea production equipment for more
than 30 years, including large-sized conductors, subsea wellheads, and subsea trees
for its offshore drilling and completion projects. This deal follows a contract awarded
to GE Oil & Gas last year for the supply of subsea production systems to ONGC’s
Vashishta (VA) and S- 1 fields, located off India’s Amalapuram coast in the KG basin.
This is ONGC’s first foray into deepwater development in India.
GE and L&T Hydrocarbon Engineering Ltd. will partner in the manufacture of subsea manifolds
destined for future deepwater projects in the Krishna-Godavari basin offshore eastern India. This
marks India’s entrance into local subsea equipment manufacturing. (Image courtesy GE)