Hydrocarbons Processing

GHD was contracted for the re-development of this storage facility, which included the re-location of a number of chemical storage tanks as well as the addition of a number of new tanks (30 in total). The chemicals consisted of highly flammable products such as propylene oxide, benzene, acrylates, phenol and acrylonitrile.

The scope of the work covered the costing, development and design for the tank level gauging system, loading control system, ESD system, and fire and gas system. Our team covered the latest PLC/RTU/SCADA technology, and worked on plant reliability and ease of operation. They also worked on the specification for a new motor control centre, power distribution and overall plant lighting. 

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The capacity of APA Group’s Carpentaria Gas Pipeline (CGP) is progressively being increased by the installation of additional compressor stations at existing scraper stations along the pipeline.

Davenport Downs Compressor Station is located in Western Queensland and is the second stage of the CGP upgrade. Davenport Downs is a Class 900# station, designed for 175 terajoules per day compression capacity.  The station consists of a Solar Centaur C50 compressor, an inlet filter coalescer, an aftercooler, two 126kilowatt Gas Engine Alternators, gas regulation and filtration skids and various site buildings.

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The liquified natural gas (LNG) plant in Maitland, Western Australia, takes natural gas from the Dampier to Bunbury gas pipeline and  produces 200 tonnes of LNG product in MN75 and MN95 grades a day.

The product is trucked to storage facilities in Broome, Derby, Halls Creek, Fitzroy Crossing and Looma.  LNG is vapourised and the gas is drawn from the storage facilities to feed gas-fired generators which provide electrical power for each of these local communities.

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The Jackson – Moomba pipeline from Jackson in southwest Queensland to Moomba in north eastern South Australia is aimed at optimizing the transport of oil from Jackson fields to Santos’ existing Port Bonython facility just north of Adelaide.  It has an initial operational capability to pump 2,880 m³/d (18,000 bpd).

GHD provided Engineering, Procurement and Construction Management (EPCM) for the oil pipeline and facilities.  The pipeline was designed and constructed to AS 2885.1-2007 which had only been recently released at the time.  It is a 273 km Class 900# DN200 buried steel pipeline and connects Santos’ Jackson facility to its Moomba facility.  The facilities designed and constructed during this project included metering stations, pig launching / receiving stations and main line valves.  There are also provisions for multiple future intakes and additional pumping booster stations to eventually increase the capacity from the initial 2,880 m³/d (18,000 bpd) to 5,200 m³/d (32,700 bpd).

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GHD was retained by Santos to upgrade and 'de-bottleneck' the Mereenie Gas Processing Facility (NT) to deliver an increased supply of gas to various customers within the Northern Territory. GHD’s role included compression FEED services, pipeline engineering services for the Mereenie Spineline supplying gas to the facility and the detailed design for the Mereenie plant compression upgrade.

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Jemena’s Munmorah Gas Pipeline supplies and stores gas for the 667 MW Colongra Gas Turbine Station near Newcastle, NSW.  The “linepack” pipeline was the first of its kind in Australia and is also the largest diameter licensed gas pipeline in Australia at 42”.  The project included a pressure regulation station which contains the largest water bath heater in Australia.  GHD provided engineering design from feasibility studies through to detailed design and provided support during construction (by Diona).

The pipeline service is unique as it provides fuel gas for the “peaking” power station which is only brought online during times of peak electricity demand.  While the power station is offline, the pipeline continues to receive gas over a 24 hour period and acts as a storage vessel.  As the instantaneous fuel demands exceed the pipelines capacity to supply gas when the power station comes online, the power station draws down on the stored gas (linepack) in the pipeline over a 3 to 5 hour period.  This allows the Owner freedom to purchase and store gas while the spot price is low and supply it during peak periods when the prices are high, therefore maximizing return.

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The North Queensland Gas Pipeline (NQGP) is a 392 km gas pipeline and 10 MW compression facility that transports coal seam gas (CSG) from Moranbah in Central Queensland to Townsville.

It has made gas available to North Queensland for the first time. The pipeline provides a strategic link between the vast gas reserves of Queensland’s Bowen Basin coalfields and the rapidly growing economy of North Queensland.

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NEC appointed GHD to perform a conceptual study for the production of approximately 40,000 bpd of liquid transport fuels from their Elimatta coal deposit located in the northern Surat Basin of Queensland.

The conceptual study was prepared in two parts.  The first part was a review of coal to liquids technologies, indirect liquefaction e.g. gasification with fischer tropsch synthesis, direct liquefaction and / or hybrid options, and selection of a preferred option for monetising Elimatta coal resources by production of diesel.  Indirect coal liquefaction was selected for the base case for this concept study. 

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GHD has a continuing relationship with the BP Refinery at Bulwer Island, providing process and technical risk management services to assist and support the refinery leadership team.

This support has covered a full range of risk management activities, including, but not limited to conducting Hazop Revalidation and Layer of Protection Analysis (LOPA) Studies for varied equipment on site from compressors to LPG storage and loadout terminal. Thermal radiation and Vapour Dispersion modeling calculations supported these activities.

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Jemena’s Sydney Primary Loop (SPL) is a 29km DN500 pipeline which runs through south western suburbs of Sydney from a connection to an existing section of the DN550 primary loop pipeline at Casula and ties in into the existing DN550 primary main pipeline at Marrickville.  The SPL pipeline connects two major Jemena Gas Networks primary mains, thus enabling continuity and reliability of gas supply if the supply on either is interrupted.  The SPL pipeline also provides further opportunity for development of the gas distribution network in Sydney area.

The facilities and stations on the SPL pipeline include Automatic Line Break (ALB) main line valve stations, a Primary Regulator Station (PRS) at Moorebank and a Trunk Receiving Station (TRS) at West Hoxton.  GHD was selected by Jemena to undertake engineering design and construction support for the pipeline and associated stations.

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