(Source:
http://www.pipelineme.com/news/international-news/2013/10/technip-in-$123bn-offshore-project-in-ghana/).
Technip, leader of a consortium with Subsea7, has been awarded by
Tullow Ghana Limited two contracts for the TEN Project, located offshore Ghana
with a combined worth of US$1.23 billion, with Technip’s share of the project
amounting to $730 million.
The TEN Field is located in the Deepwater Tano Contract Area, 60
Km off the coast of Ghana and approximately 30 Km west of the Tullow Operated
Jubilee Field. The TEN field has a water depth reaching up to 2,000m.
Frédéric Delormel, executive vice president and chief operating
officer Subsea, commented: “While the oil and gas market is rapidly growing in
Ghana, we are proud to continue to contribute to the development of this
country. Today, this new award demonstrates our ability to mobilise worldwide
resources to bring strong know-how and technological innovation meeting the
challenges of projects in ultra-deepwater.”
Jean-Marc Aubry, senior vice president at Technip for Western
Europe, Africa, India and Pakistan,said: “We have been operating in Ghana for
over four years, when we were awarded the Jubilee project, the first deep water
field ever developed in this country. These new awards correspond to a
significant milestone for our presence in Ghana.”
Technip’s scope of work includes the engineering, fabrication
and installation of nine flexible risers, 3 flexible flowlines and 12 flexible
spools totaling 48 Km.
The French engineering giant will also provide engineering,
fabrication and installation services for 33 Km of water injection and gas
injection rigid flowlines and install about 63 Km of static and dynamic
umbilicals. It will engineer, pre-fabricate and provide final assembly and
installation of 10 well rigid jumpers and delivery of a further six
prefabricated rigid jumpers.
Technip said that the major ultra-deepwater project would
require its full global expertise. The company’s operating centre in Paris will
execute this project with the support of the group’s offices in Accra, Ghana.
The flexible pipes will be fabricated at Technip’s Flexi France facility in Le
Trait, France and the rigid flowlines at the Group’s spoolbase in Evanton, UK.
The offshore installation is scheduled to be completed in the
second half of 2016.
Tullow
Ghana Limited (a subsidiary of Tullow Oil plc) is Operator of the Deepwater
Tano Contract Area with an interest of 47.175 per cent. Other partner interests
are Kosmos Energy (17 per cent), Anadarko Petroleum (17 per cent), Sabre Oil
& Gas Holdings Ltd, a subsidiary of Petro SA (3.825 per cent), and the
Ghana National Petroleum Corporation (15 per cent).
The
TEN field (source: http://www.tullowoil.com/ghana/index.asp?pageid=12).
In March 2009, the Tweneboa-1 exploration well, in the Deep
Water Tano licence, 25 km from Jubilee, discovered a highly pressured light
hydrocarbon accumulation.
The well encountered 21 metres of net pay on the edge of a giant
200 sq km fan system related to the Jubilee play. Intriguingly, the well also
encountered a four metre over-pressured oil-bearing sand and an over-pressured
zone at total depth.
Tullow planned to carry out appraisal drilling to test core
areas of the structure where thicker reservoir sections are mapped. The second
well, Tweneboa-2 began drilling towards the end of 2009. In January 2010,
Tullow announced that the well had encountered two separate hydrocarbon columns
containing oil and gas-condensate legs. In total, 32 metres of net pay were
encountered.
In July 2010, the Owo-1 exploration well encountered 53m of
light oil pay. This was followed by a sidetrack well which encountered an
additional 16 metres of net oil pay in the lower part of the same channel
system. Pressure data indicates that this oil pay is in communication with the
reservoirs penetrated in the Owo-1 well and confirms at least 69 metres of
total net oil pay in a substantial gross oil column of 200 metres. Drilling
further ahead, two gas/gas-condensate legs were also encountered totalling a
further 19 metres of net pay.
During 2011, significant progress was made in the programme of
appraisal drilling and flow testing of the Tweneboa, Enyenra and Ntomme fields,
collectively known as TEN. Tullow anticipates developing the three
accumulations in an integrated subsea cluster development scheme using a single
FPSO.
2011 accelerated appraisal
The appraisal programme commenced in January 2011 with the
drilling of the Tweneboa-3 well comprising two deviated exploratory boreholes
drilled into the Ntomme prospect which was proven to be a material and separate
gas-condensate accumulation.
Further appraisal drilling on the Enyenra field has continued
during 2011 including the re-drill of the Owo-1 discovery well in December
2011, to allow testing and coring. To determine the level of reservoir
connectivity and well deliverability, the well was flow tested. The lower
channel was tested at a rate of approximately 10,000 bopd, and a commingled
rate for the two upper channels was approximately 12,000 bopd. The pressure
response will be monitored by pressure gauges deployed in the Enyenra-2A and
Enyenra-3A wells, located to the south and north respectively.
Continued appraisal success in 2012
In the first half of 2012, the appraisal drilling and well
testing for the TEN project made good progress with three wells drilled in
support of the Plan of Development (PoD). The Owo-1RA well was drilled
and successfully tested in February 2012 at combined rates of 20,000 bopd.
Enyenra-4A was drilled in March 2012, intersecting 32 metres of oil pay. Water
injection tests on this down-dip well were carried out in April 2012 with
results proving that the Enyenra channel sands are suitable for water injection
to support oil production.
The Ntomme-2A well was drilled in May 2012
and found oil down dip of the Tweneboa-3ST gas discovery (the Ntomme discovery
well). The well was production tested at combined flow rates of around 20,000
bopd confirming excellent quality reservoir. As part of the overall appraisal
programme pressure gauges were installed in a number of the wells and gauge
readings have confirmed reservoir continuity across each of the individual
Tweneboa, Enyenra and Ntomme fields.
The data from the appraisal
activity in the first half of 2012 has enabled the subsurface models for the
TEN fields to be updated and the combined resources range is 200 to 600 mmboe
with most likely resources of 360 mmboe of which 70% is oil.
Plan of Development
In
the second half of 2012, the TEN project made good progress and Tullow and
partners submitted the Plan of Development (PoD) to the Minister of Energy in
early November 2012. On 29 May 2013, the Government of Ghana formally approved
the TEN PoD. The approval paves the way for Tullow and its partners to proceed
with the development of these discoveries and to define the final schedule and
capital programme to deliver first oil in 2016 and a steady ramp up to a
capacity production rate of 80,000 bopd. Development of the TEN Project will
require the drilling and completion of up to 24 development wells which will be
connected through subsea infrastructure to a Floating, Production, Storage and
Offloading vessel (FPSO), moored in approximately 1,500 metres of water.
Contracts for the FPSO and subsea tenders will be awarded over the coming weeks
and rig capacity for the drilling and completion of the development wells has
already been secured.
