IEST5003 BLOG

what is coal seam gas?

Coal Seam Gas (CSG) is natural gas found in coal deposits. The coal and gas are formed from plant matter under pressure over many millions of years. CSG can be captured for use as an energy source for power generation, such as cooking and heating or it can be processed into industrial processes and electricity generation and use worldwide.

In Australia, CSG is plentiful. CSG has been known about ever since the coal mining industry began in Australia in the early 1900’s.

How is CSG used for power?

CSG can be mixed with conventional gas and coal seam gases from different fields and then piped directly to users or it can be used to fuel gas turbines for mine sites as well as for urban electricity generation.

 

Advantages:

  • With advances in technology, it has developed into a key transition fuel, helping to lower our carbon emissions as we move to a low carbon future. CSG now makes up a significant proportion of Australia’s natural gas supply, with the Australia Pacific LNG Project providing the largest CSG resources in Australia.
  • Australia’s CSG supplies already make a significant contribution to powering industries and households, CSG comprises 90% of Queensland’s gas production.

 

Disadvantages:

1) the storage and transport of coal seam gas wastewater, produced in high volumes as a by-product of gas well development.  Because the CSG is found deep under the ground ,the location where groundwater first infiltrates into the geological layers will caused potential risks. So the groundwater will contaminated and having widespread effects on the groundwater quality .

  • Water extracted in the process requires careful procedures and controls to minimise environmental risk.
  • Greenhouse gases are produced as a result of CSG extraction.

 

http://theconversation.com/groundwater-the-natural-wonder-that-needs-protecting-from-coal-seam-gas-41978

http://www.oresomeresources.com/resources_view/resource/fact_sheet_coal_seam_gas

 

In my point, despite CSG is leading to concerns over fugitive emissions and impacts on water. Gas marks a new stage in the contest for the subsurface. The increasingly heated rhetoric about environmental risks associated with coal-seam gas developments and geological CO2 storage illustrates the need for new approaches to the management of sedimentary basins worldwide.

 

 

 

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