Project Profile
Value: US$54 billion
Location: Barrow Island, Australia
Start-up Year: 2015
Water Depth: 1,350 m (4,429 ft)
Capacity:15.6 million tonnes per annum
Upstream Gas Reserves: 12,000 billion ft³
The Gorgon Project is operated by Chevron. It is a joint venture of the Australian subsidiaries of Chevron (approximately 47%), ExxonMobil (25%) and Shell (25%), Osaka Gas (1.25%), Tokyo Gas (1%) and Chubu Electric Power Company (0.417%). Chevron, ExxonMobil and Shell are leading companies in the global oil and gas industry with proven technical and management skills for safe, efficient and environmentally responsible development. The offshore facilities will include a subsea gas-gathering system, a 72km, 20\" subsea pipeline running from Barrow Island to the mainland. The gas-gathering system will include wells, subsea trees, cluster manifolds, pipeline end-manifolds and flowlines. Gas-gathering system will be located on the sea floor at the Gorgon gas fields, where water depths are about 200 metres.
The CO2 re-injection scheme would take produced CO2 from the Gorgon field and Re-Inject it into the Dupuy reservior 2,500m below Barrow Island. If successful, the intended technology would reduce the LNG project’s CO2 emissions from 9.5 million tonnes per year to 3.5 million tonnes per year. The carbon injection scheme costs around US$ 1.97 billion. The Gorgon reservoir has 12.9tcf of gas in a water depth of 220m. It is also high in CO2 (in the 10-15% range) and is HT/HP (130 degrees c/360 bar). The Jansz Reservoir is lean with low co2 (1%) and is located in 1350m of water.
Operators:
Chevron Australia Pty. Ltd.: Operator with 47.333% interest
Shell Perth: 25% interest
ExxonMobil: 25% interest
Osaka Gas: 1.25% interest
Tokyo Gas Company: 1% interest
Chubu Electric Power Company: 0.417% interest
Contractors:
Agility GIL: Supply and transportation
AJ Lucas: Drilling contract
Aker Solutions: Monoethylene glycol (MEG) system
Allseas: Pipeline installation
Atwood Oceanics (Australia) Drilling contractor
AusGroup: Scaffolding contract
BJ Services: Pipeline precommissioning services
Boskalis Australia: Dredging contract
China Offshore Oil Engineering Company (COOEC): 157 process modules
CO2CRC Technologies Pty Ltd.: Feasibility Study
Consortium for FEED - EPCM for deepwater upstream facilities:
J P Kenny
Technip
Consortium for fabrication work:
AusGroup
CB&I
Kentz Corporation
Consortium to supply line pipe for export flowlines:
Marubeni Corp
JFE Engineering
Corporation Itochu Corporation
Consortium for excavation services:
Van Oord
Hamla
Emerson Process Management: Installation of subsea wet gas metres aswell as provide control valves and valve actuators
Fairstar Heavy Transport NV: Newbuild semisubmersible transportation vessel
FMC Technologies: Subsea equipment
Fugro: Geophysical and geotechnical survey contract
GE Oil & Gas: Subsea equipment contract and a service contract to maintain the compressor trains and associated equipment
IntecSea: Conceptual Design
Jumbo Shipping: Transport and discharge of twenty-five MOF caissons
KBR: FEED contract
Leighton Contractors: Deliver the civil and underground works package
Monadelphous Group: Operation and maintenance of construction facilities
MacDermid Offshore Solutions Ltd.: Subsea control fluid
Mermaid Marine Australia Ltd (MMA): Lease of supply base
Roxtec: Supply cable and pipe seals
Severn Glocon Group: Supply severe service control valves
Skilled Group: Marine vessel and labour supply
Subsea 7: Subsea umbilicals
Thiess: Deliver civil works
Toll Holdings Pty Ltd.: Logistical services
Transocean: Drilling contractor
Tag Pacific (through wholly-owned MPower subsidiary): Two power systems contracts involving the design, manufacture and testing of two 2.5MW generators
Velocious: Designing and fabricating buckle initiation components and tooling
Wah Seong Corporation Berhad: Pipe coating
Waterplex: Developed, supplied and installed mega litre water bladder tanks for water storage
UGL Limited: Provision of maintenance services for the operational phase
LogiCamms: Asset Performance services
Monadelphous Group Limited: Three-year facilities maintenance services contract associated with the Barrow Island assets operated by Chevron Australia Pty Ltd (Chevron). The contract is for the operation and maintenance of support facilities and associated utilities, and includes water and wastewater treatment plants, power generation and distribution systems, as well as the management and maintenance of various buildings, vehicles, plant and equipment. Approximately 500 people are expected to be employed to perform the work under the contract.
ALS Industrial: Five-year contract with Chevron Australia for the provision of technical services to support core maintenance, shutdowns and brownfield projects for the company’s Western Australian-based operational assets. ALS Industrial expects to provide employment opportunities for engineers, inspectors, non-destructive technicians along with contract and operational management personnel.
Civmec: Through its new division offering refractory maintenance services secured contract for the LNG project to carry out refractory installation work including supplying services to execute refractory installation works to stringent international standards. (October 2015)
CIMIC Group: To build the jetty. (2009)
Sub Contractors:
AusGroup Pty: Fabrication work with Subsea 7 plus further additional fabrication work
Consortium to provide tug and barge support for the Subsea 7 Heavy Lift & Tie-in awarded on behalf of Mermaid Marine Australia Limited
Express Offshore Solutions Pte Ltd (EOS)
Samson Express Offshore Pty Ltd (Samson)
Caley Ocean Systems: Design, manufacture and supply a deepwater lowering system (DLS) for Subsea 7
DeepOcean UK: Trenching contract for Subsea 7
Fugro: Provide survey services to support Subsea 7\'s Heavy Lift and Tie-Ins contract
Icon Engineering: Tension lift frame for Atwood Osprey
J Ray McDermott: Fabrication of subsea structures and spools by Vetco Gray
Jurong Shipyard: Constructed the Atwood Osprey for Atwood Oceanics
Matrix Composites & Engineering: Supply subsea installation buoyancy to facilitate Subsea 7’s tie-in operations
Mermaid Marine Australia Limited: Provide tug and barge support for Subsea 7
Pearson-Harper Limited: Engineering information management (EIM) services
R+M: Electrical contractor
Tempo: To provide temporary craft labour for construction, pre-commissioning and commissioning services to the mechanical, electrical and instrumentation contractor on the project. In August 2015, Tempo secured new contract extension variations for the project totalling approximately US$50 million. Tempo Construction and Maintenance, won variations to its existing sub-contract at Chevron’s US$54 billion Gorgon LNG project on Barrow Island, Western Australia. The variations relate to the provision of Managed Structural, Mechanical and Piping, Electrical & Instrumentation craft labour for construction, pre-commissioning and commissioning services to the Mechanical, Electrical and Instrumentation contractor on the Gorgon LNG project.
Weir Group plc.: Rotary gate valves to Vecto Gray
Velocious: Provide ROV Tooling and services for Subsea 7
Civmec: On behalf of GE Oil & Gas, Civmec will be constructing and testing Chevron-operated Gorgon project’s new 34 inch Subsea Pig Launcher/Receiver (SSPLR) in two stages. The first phase of works will start immediately and involve the fabrication of a 34 inch barrel for a Subsea Pig Receiver from supplied materials, with the complete structure weighing 104 tonnes. Completion of Stage 1 is scheduled for November 2015. Fabrication of a 6 inch kicker header, testing of the SSPLR and retro fitting will be carried out at a later date as part of Stage 2 works.