Gas storage
Underground gas storage investigations
Underground gas storage is a key part of the Victorian gas supply network. The process involves injecting natural gas into porous sandstone reservoirs from where it can be accessed when demand peaks, particularly in winter, helping to supplement normal supplies and reduce short-term price spikes.
Depleted gas fields around Port Campbell in South-West Victoria have been used for gas storage for more than two decades. The Victorian Gas Program investigated whether other depleted or unproduced gas fields in the area could be used for additional underground gas storage. Six gas fields (Mylor, McIntee, Tregony, Croft, Fenton Creek and Penryn) were identified for static and dynamic modelling, to quantify their potential capacity for underground gas storage.
Please note that because all VGP technical reports are divided between the Gippsland Basin, Otway Basin and Underground Storage, there will be gaps in the numbering of reports on this page. Technical reports from the Geological Survey of Victoria are primarily designed for scientific, academic and professional audiences. Progress reports that summarise the findings of the VGP’s scientific studies for the wider community are also released periodically.
Links to technical reports on the investigations are listed below.
Technical Report 9 - A preliminary ranking of potential Underground Gas Storage sites
Through this preliminary study, two ranking methods were applied to assess the suitability of 13 depleted or unproduced gas fields (sites) for potential UGS.
Technical Report 11 - A review of the preliminary Underground Gas Storage site ranking Onshore Otway Basin
In this review, capacity and injectivity values and the ranking method were refined. The top six ranked sites - Mylor, McIntee, Tregony, Croft, Fenton Creek and Penryn - were recommended for full static and dynamic modelling.
Technical Report 17 - A petrophysical model of the Waarre Formation in the Port Campbell Embayment Onshore Otway Basin, Victoria
The purpose of this petrophysical analysis was to determine consistent petrophysical properties such as porosity, permeability and hydrocarbon saturations for input into further detailed technical studies as part of the UGS project.
Technical Report 18 - A review of the Penryn gas field Onshore Otway Basin
To guide the static and dynamic modelling, data from the Penryn field was reviewed to provide further insight into the nature of the geological structure including the potential for connectivity across the field and inputs for probabilistic original gas in place (OGIP) calculations.
Technical Report 19 - A probabilistic determination of Original Gas in Place for gas fields in the Port Campbell Embayment Onshore Otway Basin
This study was undertaken to calculate probabilistic determinations of Original Gas in Place (OGIP) for all potential UGS sites to ensure consistency in field capacities prior to geological static and dynamic modelling for selected sites.
Technical Report 27 – Static modelling workflow for the underground gas storage project
This report presents the detailed static modelling workflow that was undertaken for the static modelling and provides background on the methodology. This report is supplementary to the overview provided in each modelling report.
Technical Report 28 - A static geological model of the Croft gas field, Onshore Otway Basin
This report details how the 3D static geological model of the Croft gas field was built using PETRELTM software following the static modelling workflow.
Technical Report 29 - A static geological model of the Fenton Creek gas field, Onshore Otway Basin
This report details how the 3D static geological model of the Fenton Creek gas field was built using PETRELTM software following the static modelling workflow
Technical Report 30 - A static geological model of the McIntee gas field, Onshore Otway Basin
This report details how the 3D static geological model of the McIntee gas field was built using PETRELTM software following the static modelling workflow.
Technical Report 31 - A static geological model of the Mylor gas field, Onshore Otway Basin
This report details how the 3D static geological model of the Mylor gas field was built using PETRELTM software following the static modelling workflow
Technical Report 32 - A static geological model of the Penryn gas field, Onshore Otway Basin
This report details how the 3D static geological model of the Penryn gas field was built using PETRELTM software following the static modelling workflow.
Technical Report 33 - A static geological model of the Tregony gas field, Onshore Otway Basin
This report details how the 3D static geological model of the Tregony gas field was built using PETRELTM software following the static modelling workflow
Technical Report 41 - Dynamic modelling workflow for the Underground Gas Storage project, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling workflow, which simulates the underground gas storage potential of the six modelled depleted gas fields and is supplementary to the overview provided in each modelling report.
Technical Report 42 - Dynamic modelling of the Croft gas field, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling of the depleted Croft gas field.
Technical Report 43 - Dynamic modelling of the Fenton Creek gas field, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling of the depleted Fenton Creek gas field.
Technical Report 44 - Dynamic modelling of the McIntee gas field, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling of the depleted McIntee gas field.
Technical Report 45 - Dynamic modelling of the Mylor gas field, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling of the depleted Mylor gas field.
Technical Report 46 - Dynamic modelling of the Penryn gas field, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling of the depleted Penryn gas field.
Technical Report 47 - Dynamic modelling of the Tregony gas field, Onshore Otway Basin
Dynamic modelling is used to predict storage capacity, injectivity and deliverability of a reservoir. This report details the dynamic modelling of the depleted Tregony gas field.
Technical Report 52 - Fluid dynamic and geomechanical modelling, Onshore Otway Basin
There are currently three depleted gas fields used for underground gas storage in Victoria. These sites are in the Port Campbell area in the onshore component of the Otway Basin. This report presents a dynamic modelling study that assessed the suitability of representative structures for more storage using publicly available data.
Technical Report 53 - Geomechanical analysis for the Underground Gas Storage project
There are currently three depleted gas fields used for underground gas storage in Victoria. These sites are in the Port Campbell area in the onshore component of the Otway Basin.Six nearby depleted gas fields (GSV) underwent geochemical analysis to simulate the impacts of gas injection and withdrawal in an underground gas storage environment.
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Technical Report 54 - Commercial feasibility of potential underground gas storage fields Onshore Otway Basin
There are currently three depleted gas fields used for underground gas storage in Victoria. These sites are in the Port Campbell area in the onshore component of the Otway Basin. Six nearby depleted gas fields were assessed for their commercial feasibility regarding expanding underground gas storage capacity in the onshore Otway Basin. Dynamic modelling was used to predict storage capacity, injectivity and deliverability and to optimise potential development options for this study.
Page last updated: 01 Dec 2021