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Coastal bitumens and potential source rocks in the western Otway Basin, South Australia and Victoria.
Created: 13 Nov 2024 Revised: 13 Nov 2024

20 coastal bitumen and drill cutting samples between Portland in western Victoria and the mouth of the Murray River in SA, (concentrating on the Cretaceous interval) from 4 wells were analysed (API gravity, pour point,sulphur content, total...

20 coastal bitumen and drill cutting samples between Portland in western Victoria and the mouth of the Murray River in SA, (concentrating on the Cretaceous interval) from 4 wells were analysed (API gravity, pour point,sulphur content, total organic carbon, rock-eval pyrolysis, organic petrology, extractable organic matter, liquid chromatography, carbon isotope analysis, gas chromatography, gas chromatography - mass spectrometry). The oil generation window is identified for the wells. Although only marginally mature, the best potential source rocks analysed are Early Cretaceous coals and carbonaceous shales at the base of the Eumeralla Formation and in the underlying Pretty Hill Formation at Chama-1A. The bitumens are mature crude oils with a primary algal source in beds rich in organic matter and consist of at least 4 distinct oil families.

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About this record

Record No mesac36182
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Energy Company Report - Annual licence or technical report
Contributor Ultramar Australia Inc.
Sponsor
Tenement
Tenement Holder
Operator
Geological Province Otway Basin
Mine Name
Stratigraphy
Commodity
    Notes 
    Notes: Edited material in Env 5011, vol 1.
Doc No: Env 05876 R1
Drillhole: Crayfish-A 1;Chama 1;Chama 1a;Argonaut 1
    Notes: Edited material in Env 5011, vol 1.
Doc No: Env 05876 R1
Drillhole: Crayfish-A 1;Chama 1;Chama 1a;Argonaut 1
    Language English
    Metadata Standard ISO 19115-3

    Citations

    Use constraints License
    License Creative Commons Attribution 4.0
    Persistent identifier https://pid.sarig.sa.gov.au/document/mesac36182
    Citation Coastal bitumens and potential source rocks in the western Otway Basin, South Australia and Victoria. Energy Company Report - Annual licence or technical report
    https://pid.sarig.sa.gov.au/document/mesac36182

    Technical information

    Status
    Maintenance and Update Frequency
    Geographic Reference GDA2020 (EPSG:7844)
    Geo bounding box {"type":"Polygon","coordinates":[[[129,-39],[141,-39],[141,-26],[129,-26],[129,-39]]]}
    Purpose 
    
                    
                    
    
                    
                      		
                
    
              
                
                
    
                  
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