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Offshore Oil & Ocean Engineering


September 2015 Issue

FEED Contract for First
US Floating LNG Vessel

Bechtel has been selected by Delfin LNG, a wholly owned subsidiary of Fairwood Peninsula Energy Corp., to perform front-end engineering and design (FEED) for the first U.S.-based floating LNG vessel (FLNGV) to go into service at Port Delfin, a proposed deepwater port and floating LNG facility that will be located approximately 50 miles off Cameron Parish, Louisiana.

This will be the first offshore floating natural gas liquefaction facility in the U.S. Upon the final investment decision, Bechtel is expected to design, build and commission the FLNGV.

Port Delfin will receive natural gas from the Delfin Offshore Pipeline. FLNGV will be able to disconnect from the port facility and move to protected waters during a hurricane. The offshore location of the port will significantly reduce coastal LNG carrier traffic and minimize nearshore environmental impacts.

MBES Survey, Seabed Coring
In Honduran Caribbean

Fugro has been awarded a contract by BG International Ltd. Sucursal Honduras to conduct an integrated multibeam echosounder (MBES) survey and seabed coring campaign over its offshore acreage (block) in the Honduran Caribbean. As part of BG’s exploration license commitments, the campaign will map the seafloor to interpret, identify, sample, and analyze potential hydrocarbon seeps.

The MBES and seabed coring program will cover an area of the Patuca Basin more than 10,000 sq. km in the northern part of the block. Features of interest will be identified and evaluated to generate a final set of locations to target for precision geochemical sampling. The coring phase will follow to collect approximately 200 seabed cores and 15 heat flow measurements.

Ceona Partners with Interoil
Angola in West Africa

Ceona, SURF contractor with heavy subsea construction capabilities, has expanded its West African reach after entering into a strategic partnership with Interoil Angola Lda.

The partnership will see Interoil Angola, which is a key player in offshore support vessel management in West Africa, support Ceona’s plans to expand into Angola.

Ceona is already active in West Africa through its Ceona-Seaweld joint venture in Ghana, as well as the company’s strategic partnership with Marine Platforms Ltd. in Nigeria.

Ceona’s Amazon hybrid vessel can execute complex logistical projects in remote, harsh and deepwater territories. Designed to deliver full flexible or full rigid pipelay, it can change easily and quickly between each mode and is extremely weather resilient. With a deck area of 4,600 sq. m and the ability to carry 9,500 te of pipe on deck and in its two holds, the Amazon is custom designed for full deepwater field development needs.

Miko Patches Enable
In-Situ Vessel Repair

BW Offshore successfully used Miko magnetic patches to repair cracks in the hull plating in the engine room of the FPSO Abo operating off the Nigerian coast.

Conventional repair techniques would have required the vessel to enter dry dock for repair or have a costly, time-consuming exterior habitat built over the work location so the leak could be repaired permanently with the vessel in situ.

Instead, working with the Miko patches and a six-man dive team made it possible to weld the cracks from inside the engine room.

The magnetic patches, called Miko Plasters, are manufactured by a process that mixes rare earth particles with an exceptionally strong blend of Nitrile rubber. A finished patch will weigh 10 kg/sq. m, so an additional layer of buoyancy material is also laminated to the patch so that it can be easily handled underwater by divers. These two layers are then laminated onto an external fabric manufactured from high-strength PVC.

The patches were kept in place on the hull for more than six months, during which time a range of structural engineering tasks were completed in the engine room area.

Floating LNG Terminal
For Puerto Rico

The U.S. Federal Energy Regulatory Commission (FERC) has authorized Excelerate Energy, in cooperation with the Puerto Rico Electric Power Authority (PREPA), to site, construct and operate the proposed Aguirre Offshore GasPort Project located offshore Puerto Rico.

The project is expected to have no significant environmental impact and will have to comply with all the environmental conditions outlined by FERC.

The proposed project will be a floating LNG terminal with the same capabilities as a land-based terminal. It will consist of a floating storage and regasification unit (FSRU), minimal infrastructure to moor the vessel, and a subsea pipeline to deliver the gas onshore.

The facility will provide fuel to PREPA’s Central Aguirre Power Complex. Fuel cost reduction and environmental improvements, such as improved air quality and reduced barge traffic in the environmentally sensitive Jobos Bay, are the primary drivers for bringing the project to Puerto Rico.

In the coming months, Excelerate will continue to work with FERC and cooperating agencies in preparation for the commencement of construction, estimated to begin in the first quarter of 2016, with an in-service date of the second quarter of 2017.

Prep Piles for Culzean
Wellhead Platform Jacket

During its first commercial application, the new Vibro Lifting Tool (VLT) of CAPE Holland successfully installed four piles in up to 90 m water depth.

This installation is part of the prepiling project for the Culzean Wellhead Platform jacket to be installed next year. The VLT was used as a stabbing tool to install all four piles in one sequence to stable depth through a template without any tool change. Negating the need for a tool change meant it was possible to install all the piles in just one 12-hr. shift to the predicted penetration depths, which resulted in significant time saving.


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