2020 Oct 25th Geochemical Composition of Natural Gases from the onshore Canning Basin, Australia

 Current conventional remaining gas resources of the Canning Basin are deemed limited, whereas unconventional gas resources are inferred to be extremely high, with estimated recoverable resources for shale gas and tight gas. 

The three main types of unconventional gas are 

coal seam gas (CSG), CSG is found in coal seams

shale gas - found in shale rocks (Shale is a fine-grained, clastic sedimentary rock, composed of mud that is a mix of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite). 

tight gas - found in low permeability sandstone rocks.

Gas samples were provided from Canning Basin wells (Pictor East 1, Stokes Bay 1, Ungani 2, Yulleroo 2 and Yulleroo 3) (Figure 2.1) were provided to Geoscience Australia by Buru Energy.

A petroleum seep is a place where natural liquid or gaseous hydrocarbons escape to the earth's atmosphere and surface, normally under low pressure or flow. ... In locations where seeps of natural gas are sufficiently large, natural "eternal flames" often persist.