Authors / CoAuthors
Wang, L. | Bailey, A. | Grosjean, E. | Carson, C. | Carr, L. | Butcher, G. | Boreham, C. | Henson, P.
Abstract
As part of Geoscience Australia’s Exploring for the Future program, this study aims to analyse the hydrocarbon prospectivity in the Carrra Sub-basin through wireline log interpretation and shale gas reservoir characterisation. NDI Carrara 1 is the first stratigraphic test of the Carrara Sub-basin, a recently uncovered depocentre located within the South Nicholson region of the eastern Northern Territory and northwestern Queensland. Four chemostratigraphic packages were defined according to the informal sub-division of stratigraphy and inorganic geochemical properties. Wireline log interpretation has been conducted to derive the clay mineral compositions, porosity, gas saturation and gas contents for the unconventional shale gas reservoirs in the Proterozoic succession in NDI Carrara 1. The predominant clay minerals include illite/muscovite, mixed-layer clay, smectite, kaolinite, and minor contents of glauconite and chlorite. The average geothermal gradient is estimated to be 35.04 °C/km with a surface temperature of 29.4 °C. The average formation pressure gradient is calculated to be < 10.7 MPa/km from mud weight records. Artificial neural network technology is used to interpret the TOC content from wireline logs for unconventional shale gas reservoirs. TOC content is positively correlated with methane and ethane concentrations in mudlog gas profiles, shale porosity, formation resistivity and gas content for NDI Carrara 1. The organic-rich shales in P2 have favourable adsorbed, free and total gas contents. The organic-rich micrites within P3 have the potential in adsorbed gas, but with very low average gas saturation (< 0.01 m3/m3). Our interpretation has identified potential shale gas reservoirs, as well as tight non-organic-rich shales and siltstones with potential as gas reservoirs. These occur throughout several of the identified chemostratigraphic packages within the Proterozoic section of NDI Carrara 1.
Product Type
document
eCat Id
147880
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
- Contact instructions
- MEG
Resource provider
Digital Object Identifier
Keywords
- theme.ANZRC Fields of Research.rdf
-
- EARTH SCIENCES
- ( Project )
-
- Exploring for the Future
- ( Project )
-
- NDI Carrara 1
- ( Discipline )
-
- Petrophysics
- ( Feature type )
-
- wireline log
- ( Discipline )
-
- Chemostratigraphy
- ( Feature type )
-
- Total organic carbon content
- ( Feature type )
-
- Porosity
- ( Feature type )
-
- Gas content
- ( Discipline )
-
- Reservoir characterisation
- ( Place )
-
- Carrara Sub-basin
- ( Project )
-
- MinEx Cooperative Research Centre (CRC)
- ( Place )
-
- South Nicholson Region
- ( Project )
-
- Barkly-Isa-Georgetown project
-
- Published_External
Publication Date
2023-06-19T23:45:02
Creation Date
Security Constraints
Legal Constraints
Status
onGoing
Purpose
As part of Exploring for the Future program in Geoscience Australia, this work aims to analyse the hydrocarbon potential in the Carrara Sub-basin, South Nicolson region, through wireline log data interpretation and shale gas reservoir gas characterisation in the Proterozoic succession in NDI Carrara 1. The research results have been merged into a pdf document.
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Record 2023/026
Lineage
This work is part of Exploring for the Future program in Geoscience Australia, which aims to analyse the hydrocarbon prospectivity in the Carrara Sub-basin through wireline log interpretation and shale gas reservoir characterisation. The wireline logging data were acquired and released by MinEx CRC and Geoscience Australia Portal. Petrophysical interpretation and reservoir characterisation results have been merged into a pdf document.
Parent Information
Extents
[-22.4257, -19.4954, 140.9958, 144.7802]
Reference System
Spatial Resolution
Service Information
Associations
Source Information