From Geoscience Australia
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

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

Created 17/10/2025

Updated 17/10/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

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.

Files and APIs

Tags

Additional Info

Field Value
Title 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
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/e965815b-0ee6-4a9b-a1e7-1fa833b42f1c
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "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". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/drilling-operations-in-the-sydney-basin-new-south-wales-1958-1962-of-australian-oil-and-gas-cor