Drilling Operations In The Sydney Basin New South Wales, 1958-1962 Of Australian Oil And Gas Corporation Limited Farmout Drillers No Liability And Exoil (N.S.W.) Pty Limited

Mulgoa No. 2 Well was located in the central-western part of the Sydney Basin, about 35 miles west of Sydney, New South Wales. The well was drilled by the Operator, Australian Oil and Gas Corporation Limited, using a Bucyrus Erie 48-L cable-tool rig, to a total depth of 5630 feet. Drilling commenced on 20th September, 1958, and was completed on 5th November, 1959. A programme of coring and gas sampling was carried out, but no electric logging, perforating or testing operations were undertaken.


The well penetrated 2498 feet of Triassic shales and sandstones and 3132 feet of Permian coal measures, sandstones, shales, and siltstones.


The objective of the drilling operation was to test the petroleum potential of the Permian strata in the Mulgoa Anticline. Pre-Permian rocks were expected between 5000 and 5200 feet but the well was still in sediments of Permian age when mechanical difficulties caused it to be abandoned at 5630 feet. The well was sited on the eastern flank of the anticline, some 15 miles east (basinwards) of outcropping Permian strata.


Many natural gas shows were encountered in the Triassic and Permian beds but none proved to be of commercial significance. The only large flows of natural gas were at 2579 feet and at 3558 to 3559 feet, and these proved to be blowouts in coal seams. Flows in both cases quickly subsided. Orifice meter tests of twelve gas flows gave a maximum yield of 40 Mcf/D, reducing to 10 Mcf/D after 20 hours.


The stratigraphic drilling operation at Mulgoa No. 2, New South Wales, was subsidized under the Petroleum Search Subsidy Act 1957-1958, from surface to total depth.

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Date (Publication)
1965-01-01T00:00:00
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Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/67289

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Bureau of Mineral Resources

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PSSA_12

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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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Product data repository: Various Formats

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  • petroleum exploration

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4.0

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2018-11-01T00:00:00
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Unclassified
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English
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Download the file (pdf)

Download the file (pdf)

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GA Publication

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Australian Government Security ClassificationSystem

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2018-11-01T00:00:00
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https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

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Metadata identifier
urn:uuid/a05f7893-0013-7506-e044-00144fdd4fa6

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English
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UTF8
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Commonwealth of Australia (Geoscience Australia)

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PSSA Publication

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eCatId/67289

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/a05f7893-0013-7506-e044-00144fdd4fa6

Date info (Revision)
2018-04-22T08:31:28
Date info (Creation)
2008-08-12T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

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Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

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petroleum exploration

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