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DBP Development Group (DDG), a subsidiary of DUET Group, is developing a natural gas storage facility in the depleted Tubridgi field reservoir, located approximately 30 kilometres from Onslow in Western Australia.
The gas storage facility will improve the security of Western Australia’s gas supply and benefit producers and customers by storing unused gas.
DDG has signed a 10-year storage contract with CITIC Pacific Mining Management and has a five-year option to store natural gas at the facility for its Sino Iron magnetite project.
The Tubridgi gas storage facility will be developed in the depleted Tubridgi field, which produced gas from 21 wells between 1991 and 2004.The new facility will have the capacity to store 42pJ with an injection and withdrawal rate of 50tJ/day.
The onshore gas field was chosen as the gas storage facility due to the uniqueness of its reservoir, which is located at a shallow depth of 550m, which means that the pressure required for the required injection is usually lower than average.
In addition, active aquifers provide permeability and pressure support properties to the reservoir.This will help ensure a constant rate of injection and withdrawal once the facility is operational.
The infrastructure for the gas storage facility will be located at the Griffin export facility currently owned by BHP, and DDG plans to utilize the field’s existing infrastructure as much as possible.
The gas storage facility will include an inlet separation unit, a mercury removal unit for pretreatment, a gas dehydration unit and a compression unit for gas injection and extraction.
A custody transfer metering unit, various pig/receiver facilities and an evaporation pond will also be part of the site.
A pre-existing natural gas distribution branch is planned to connect the site infrastructure to the Dampier-Bunbury natural gas pipeline at Compressor Station 2.
DDG plans to drill a total of 6 injection and extraction wells, each of which will be equipped with a wellhead Christmas tree, a safety shut-off valve, corrosion inhibitors, solar panels and batteries, and transmitters/receivers for pigs unit connection.A flowline connects the well to the storage facility.
A 40m x 65m double-layer evaporation pond will also be constructed to collect process water for evaporation.
Development of the gas storage facility will begin with civil works to upgrade and access existing access for easier access to the well site.
Construction work will then focus on wellsite preparation and installation of structural conductors above the well.
Flowlines are expected to be installed to connect the wellsite to the site infrastructure.
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Post time: Feb-28-2022
