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Our Key Achievements
Below is a list of some recent key project achievements for our Wood Group Kenny businesses:
The Rhum field is a satellite to the Bruce platform and is operated by BP in the UK North Sea. The subsea facilities comprise three wells tied back to a subsea manifold through 8" pipe-in-pipe insulated infield flowlines. The manifold is connected to the Bruce platform via a 45km pipe-in-pipe insulated system. J P Kenny engineered all facilities and was part of the joint management team responsible for the whole development.
The subsea system represents a major challenge because of the well fluid chemistry and extremely high wellhead temperatures and pressures. A pipein-pipe system was required to maintain the fluids above the hydrate formation temperature. Although the manifold incorporates a HIPPS System to protect the 16" pipeline and platform against the full wellhead shut-in pressure, the operating pressures mean that the pipe wall thickness exceeded the limits of proven reeling technology. J P Kenny initiated and managed extensive testing to confirm reeling feasibility, a measure which saved the project an estimated £10million when reeling is compared to conventional installation methods.
The Independence Hub is a semi-submersible platform situated in the Gulf of Mexico on Mississippi Canyon Block 920 in a water depth of 8000 feet. At the time of its installation, it was the deepest floating production facility, with the deepest risers, ever installed. This landmark development involved several companies working in partnership and has given access to multiple ultra-deepwater natural gas and condensate discoveries which were previously untapped.
Working for the eight operators in the field, MCS Kenny was responsible for verifying the front end engineering design (FEED) of the riser designs of all competing hull contractors. Atlantia Offshore was awarded the hull contract and MCS Kenny went on to provide detailed design of eleven initial Steel Catenary Risers (SCRs) and seven future SCRs. MCS Kenny also provided verification for all the umbilical risers, reporting directly to the operators with responsibility for this aspect of the project. The extensive design review and validation testing involved full scale and laboratory techniques to verify the fatigue design of the system. The final design of the riser system was heavily influenced by the fatigue performance of the riser touchdown zone and hang-off region.
Natural gas production started in July 2007 and the facility is capable of delivering 1 billion cubic feet of gas per day to consumers in the US.
Block 31 BP Angola Developments
Block 31 lies in ultra deep water offshore Angola. The first development in this block, Plutao-Saturno-Venus-Marte (PSVM) is for depletion of reserves in the North East quadrant of the block. The four PVSM fields are being developed using a centrally located FPSO linked via flowlines and risers to 40 subsea production wells grouped in four clusters, with power and chemical distribution via umbilicals to the network of subsea systems.
Water depths range from 1,800 to 2,050 metres, with reservoir pressures to 360 bara and temperatures up to 95 deg. C. Reservoir pressure support is achieved by both water and gas injection, with gas export infrastructure configured to ultimately export produced gas.
J P Kenny were appointed Subsea Technical Support Contractor to the BP SURF (Subsea, umbilical, riser and flowline) team Pre-FEED in 2005, and have been working embedded within the BP project team in that role since then. The Execute Phase started in 2008 with J P Kenny continuing to provide support up to 2011. This has been a major project for Wood Group Kenny and has included the following activities during the Execute Phase:
- Flow assurance, operability philosophies and SURF system operating procedures
- Subsea architecture layouts, P&IDs and production of as-built drawings
- Design assurance for flowline analysis, risers, control system and trees.
- Provision of specialist engineering skills for subsea, umbilical, materials and cathodic protection
- Support to management of interfaces
- Provision of engineering support during offshore installation phases
- Management of the SURF sector change process
Gorgon Gas Project
Greater Gorgon consists of 12 gas fields containing in excess of 40 tcf of recoverable natural gas. The field development concept is to supply untreated gas from the subsea facilities via two 30”, 140km pipelines to an LNG plant situated on Barrow Island, a class A nature reserve just off NW Australia.
Greater Gorgon presents a series of technical challenges that have rarely been encountered in a single project. The field contains around 15% CO2, high pressure and temperature, factors which complicate material selection.
The large diameter valves at the rated class 2500 are new technology and so qualification programmes are needed. The structures to support the manifold equipment are large and will require specialist installation equipment. With seabed angles of up to 70%, and water depths of up to 1350m, the large diameter pipelines themselves are at the limit of installation capability. J P Kenny has assembled an engineering team from around the globe to meet these challenges. Situated together with the Chevron and ExxonMobil team, they are jointly solving the technical and delivery issues to meet the target project schedule.
ConocoPhillips Operating Integrity Assessment at Bayu Undan Facilities, Australia (2006)
As part of ConocoPhillips’ ongoing Operations Excellence program, WGIM was requested to perform a formalised review and assessment of all aspects of the Asset and Operating Integrity Management Systems, focusing on key elements such as Structures, Export Pipeline, Subsea Pressure Equipment and Drilling/Reservoir. This review was undertaken through the systematic review of a number of key areas, including interviews with key personnel, and review of documentation and technical information from the facilities. Following formal management approval of the findings, a detailed Strategic Improvement Plan was developed, highlighting tasks and resources required to improve the overall integrity performance on the facilities, and developing performance measurement and progress indices.
Cabinda Gulf Oil Company (CABGOC) Integrity Management Project, Angola (2003)
J P Kenny and WGIM were commissioned by CABGOC to provide integrated facilities engineering support to manage their assets. This integrated support involved preparing an Inspection, Maintenance and Repair (IMR) philosophy and plan for subsea assets (pipelines, risers) based on risk prioritisation and management. A review of suitable internal inspection methods for the 36” Tanker Loading Line (TTL) was also carried out, along with a high level Cost Benefit Analysis (CBA) to evaluate the suitable internal inspection methods for the TTL. An Intelligent Pig (IP) inspection and maintenance program was prepared and engineering assessments were performed as necessary, e.g. freespan engineering assessments, Fitness for Purpose (FFP) remaining life. Cathodic Protection (CP) assessments of the pipelines and structures were carried out. Finally, J P Kenny and WGIM developed, compiled and verified the information management system for CABGOC’s assets, focussing primarily on pipelines (510+) but also addressing jackets, platform structures and risers. The system manages asset information verification, as well as integrity history capture and IMR Plans, to enable accurate Risk-Based Inspection and management of CABGOC’s assets.
Cape Wind’s 468MW Nantucket Sound Offshore Wind Farm, US (2009-ongoing)
SgurrEnergy is the Owner’s Engineer for this high profile project, which is currently the most advanced utility-scale offshore wind farm development in the US. Our assignment to date has included preparing various technical reports and reviews, producing the employer’s requirements and project specification documents issued to EPC and WTG supply bidders, reviewing WTG bidder responses, and providing direct support to Cape Wind during the process of appointing a preferred WTG supplier. We also supported preparation of construction plans to the BOEMRE as part of the federal offshore leasing process. We continue to provide engineering and contract support to Cape Wind, with our US staff forming an integral part of Cape Wind’s delivery team.
OCTIP Transient simulation model & Real-time Asset Management System
The Onshore Terminal Integration Project (OCTIP) developed by BP, increases reserves from the Southern North Sea (SNS) assets. MSi Kenny provided a full field transient simulation model to develop new operational procedures, examine control loops, and develop liquid transport and pigging analysis. MSi Kenny also implemented a real-time asset management system to advise and assist control room operators on impending liquids handling problems at the terminal.