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Otway Basin Seismic Test Survey 1991 : Operational Report

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Created 20/01/2025

Updated 20/01/2025

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The Australian Geological Survey Organisation (AGSO) (formerly the Bureau of Mineral Resources, Geology and Geophysics (BMR)) conducted a deep seismic reflection test survey in the onshore portion of the Otway Basin in the southeastern part of South Australiaand southwestern part of Victoria, from late October to early November 1991. The seismic test survey was undertaken to test the feasibility of recording deep seismic reflection dataprior to commencing a major deep seismic reflection survey in the Otway Basin. A planned major deep seismic reflection survey by AGSO formed part of a National Geoscience Mapping Accord (NGMA) project to study the early development of the Otway Basin. The seismic reflection test survey operated for a period of three weeks, including mobilisation and demobilisation to the survey area, with five test sites occupied during thetest survey. The seismic test sites were positioned to examine the feasibility of recording deep seismic reflections in areas with different outcropping rock types along the proposed mainseismic lines. CMP seismic profiles were recorded along all five test lines, with uphole shoots, shot depth and charge size comparison tests performed at several of the sites. Good quality deep seismic reflection events were recorded at several of the seismictest sites. The eismic test survey was important in highlighting areas with difficult shothole drilling conditions, especially the palaeo-sand dunes along the SA-Victoria border, and theTertiary shelly sands with shallow water table near Lake Bonney. A major seismic survey would require all shothole drilling rigs to be equipped with portable mudpits to enableshotholes to be drilled in the palaeo-sand dunes and shelly sands.

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Field Value
Title Otway Basin Seismic Test Survey 1991 : Operational Report
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/b4e55761-9be8-409d-976a-569ba5e8e8ec
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage http://www.ga.gov.au/place-names/PlaceDetails.jsp?submit1=GA1
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Otway Basin Seismic Test Survey 1991 : Operational Report". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/otway-basin-seismic-test-survey-1991-operational-report