Cooper Basin Deep Coal – the New Unconventional Paradigm: Deepest Producing Coals in Australia Bronwyn Camac, Jim Benson, Vicki Chan and Alison Goedecke
In August 2015, the first “coal-only” exploration well, Washington-1, was drilled and fractured stimulated in PEL570, SA Cooper Basin. The well was located in the deepest part of the Patchawarra Trough.
By 2016, long term production from Permian coals, mainly from the Patchawarra Formation, had proved an estimated economic recovery.
https://sydney2018.aseg.org.au/Documents/Monday%20Abstracts/M3.1A.pdf
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