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Summary Of Data And Results Otway Basin, South Australia Geltwood Beach No. 1 Well Of Beach Petroleum No Liability

Created 17/10/2025

Updated 17/10/2025

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Geltwood Beach No. 1 Well was located on the Geltwood Anticline, approximately 7 1/2 miles south-west of Millicent in the Otway Basin, in the south-eastern part of South Australia. The well was drilled by Drilling Contractors (Australia) pty Ltd for Beach Petroleum No Liability, to a total depth of 12,300 feet. Drilling commenced on 22nd August, 1963, and was completed on lOth November, 1963. A full programme of logging, testing, and coring was undertaken. After passing through 45 feet of Recent calcareous sand, the well penetrated 1860 feet of Miocene to Eocene marine and paralic sediments, and 1760 feet of (?) Palaeocene to Upper Cretaceous sands and grits. Below 3680 feet, a monotonous sequence of Upper to Lower Cretaceous sediments of the Merino Group were encountered and continued to total depth at 12,300 feet. Geltwood Beach No. 1 Well was drilled to test the hydrocarbon potential of Lower Tertiary and Upper Cretaceous sediments on a probable closed structure in an area where strandings of bitumen and heavy oil on the beaches were thought to indicate SUbmarine seepages. Evidence from wells at Mount Salt and Beachport indicated that Geltwood Beach No. 1 was near the edge of probable wedge-out of Middle to Upper Cretaceous and (?) Palaeocene marine sediments overlying Lower Cretaceous beds. Traces of gas were recorded at intervals from 4500 feet to total depth, but five drillstem tests yielded only slightly gascut salty water and drilling mud. The well was plugged and abandoned as a dry hole. The stratigraphic drilling operation at Geltwood Beach No. 1 was subsidized under the Petroleum Search Subsidy Act 1959-1961, from surface to total depth.

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Title Summary Of Data And Results Otway Basin, South Australia Geltwood Beach No. 1 Well Of Beach Petroleum No Liability
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/580f39f2-5493-465b-af9d-fcedcef9cee8
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

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This dataset was originally found on Geoscience Australia "Summary Of Data And Results Otway Basin, South Australia Geltwood Beach No. 1 Well Of Beach Petroleum No Liability". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/summary-of-data-and-results-otway-basin-south-australia-geltwood-beach-no-1-well-of-beach-petro