Unconventional hydrocarbon prospectivity of the Paleoproterozoic Fraynes Formation in Manbulloo S1, Northern Territory  


Authors / CoAuthors

Wang, L. | Bailey, A. | Grosjean, E. | Palu, T. | Carson, C. | Carr, L. | Anderson, J. | Butcher, G. | Southby, C. | Henson, P.

Abstract

The Palaeoproterozoic Fraynes Formation in the Birrindudu Basin is a chronostratigraphic counterpart to the highly prospective Barney Creek Formation in the McArthur Basin. However, there is limited understanding of its source potential in comparison. As part of Geoscience Australia’s Exploring for the Future program, this study aims to assess the hydrocarbon generating potential and shale gas prospectivity of the Fraynes Formation in the exploration drillhole Manbulloo S1 through the reconstruction of original source-rock generating potential and well log interpretation. Internal units inside the Fraynes Formation were defined according to sedimentary facies. The hydrocarbon generation potential was estimated using the original TOC content, hydrogen index and thermal maturity data. The shale total porosity was re-interpreted from bulk density logs by removing the organic matter effect and adding organic porosity for the organic-rich shales. The water saturation was then updated accordingly. The maximum amount of generated gas of the organic-rich source rocks are 3969 Mcf/a-ft, 2769 Mcf/a-ft and 1912 Mcf/a-ft when assuming the kerogen compositions of 100 Type I, mix of 50-50% Type I and II, and 100% Type II, respectively. The richness of organic matter and interpreted water saturation (<100%) imply favourable shale gas prospectivity in the Fraynes Formation. This work expands our knowledge on the unconventional energy resources in the west of the greater McArthur Basin. Paper presented at the 2024 Australian Energy Producers (AEP) Conference &amp; Exhibition (https://pesa.com.au/events/2024-aep-conference-exhibition/)

Product Type

document

eCat Id

149134

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

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Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Theme )
  • unconventional hydrocarbon prospectivity
( Stratum )
  • Fraynes Formation
( Discipline )
  • shale gas
( Stratum )
  • Paleoproterozoic
( Feature type )
  • generated gas
( Feature type )
  • total organic carbon
( Discipline )
  • petrophysical interpretation
( Project )
  • Exploring for the Future - EFTF
  • Published_External
( Project )
  • Officer–Musgrave–Birrindudu

Publication Date

2024-06-18T00:06:33

Creation Date

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Australian Government Security Classification System    

Classification - unclassified

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Creative Commons Attribution 4.0 International Licence    

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Use - license

Status

completed

Purpose

Part of EFTF program and on energy prospectivity in the greater McArthur Basin.

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asNeeded

Topic Category

geoscientificInformation

Series Information

Australian Energy Producers (AEP) Conference & Exhibition 20-23 May 2024, Perth WA

Lineage

As part of EFTF program, the hydrocarbon generating potential and shale gas prospectivity were investigated for the Fraynes Formation in Manbulloo S1. All the results have been put onto a pdf document.

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Extents

[-17.1958, -13.4577, 130.1386, 134.2923]

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