Stratigraphic and depositional framework of the Walloon Subgroup, eastern Surat Basin, Queensland

Hamilton, S. K., Esterle, J. S. and Sliwa, R. (2014) Stratigraphic and depositional framework of the Walloon Subgroup, eastern Surat Basin, Queensland. Australian Journal of Earth Sciences, 61 8: 1061-1080. doi:10.1080/08120099.2014.960000


Author Hamilton, S. K.
Esterle, J. S.
Sliwa, R.
Title Stratigraphic and depositional framework of the Walloon Subgroup, eastern Surat Basin, Queensland
Journal name Australian Journal of Earth Sciences   Check publisher's open access policy
ISSN 0812-0099
1440-0952
Publication date 2014-10-01
Year available 2014
Sub-type Article (original research)
DOI 10.1080/08120099.2014.960000
Open Access Status
Volume 61
Issue 8
Start page 1061
End page 1080
Total pages 20
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2015
Language eng
Abstract The Middle Jurassic Walloon Subgroup is a prolific coal seam gas (CSG) resource in the Surat Basin, Queensland. Sedimentary framework models constrain stochastic reservoir models of the geological heterogeneity, but there is limited basin analysis information in the public domain. Here we present a regionally consistent stratigraphic framework model for the Walloon CSG play in the eastern Surat Basin. Lithostratigraphic correlation of open-file industry and government wireline logs supports the interpretation of six subunits in the eastern Surat Basin (oldest–youngest: Durabilla Formation; Taroom Coal Measures; Tangalooma Sandstone; and Juandah Coal Measures, informally divided into three members named the lower Juandah Coal Measures, Juandah sandstone and upper Juandah Coal Measures). Important findings are that subunits within the Walloon Subgroup do not correlate along the entire CSG play area; in many places, the overlying Springbok Sandstone (Upper Jurassic) has incised to the lower Juandah Coal Measures level, removing the upper coal seam groups. The Walloon Subgroup thins to the south through a combination of depositional thinning and truncation. Lithofacies analysis and isopach maps support deposition in a southerly prograding fluvial system or clastic wedge. This stratigraphic and depositional interpretation informs models for hydrogeological studies of the Walloon Subgroup and underpins a regional assessment of controls on microbial methane distribution.
Keyword Surat Basin
Jurassic
Walloon Subgroup
Stratigraphy
Basin analysis
Paleogeography
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published ahead of print 10 October 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2015 Collection
 
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