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Time-Depth Functions for the Otway Basin

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Created 13/01/2025

Updated 13/01/2025

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The seismic stacking velocity data in the Otway Basin are a useful dataset for calculating depths and sediment thicknesses. This work presents time-depth relationships computed from unsmoothed stacking velocities and compares these with functions obtained from sonobuoy refraction data and exploration well sonic logs. The comparison suggests that a total sediment thickness over-estimate for the Otway Basin of about 15% can be expected from the depths derived from stacking velocities alone. On the other hand, for sediment thickness calculations down to ~3 s two-way travel time below sea floor, stacking velocity data give comparable depths to those obtained from the sonic logs. A piece-wise formula is offered which scales the time-depth function for the Otway Basin in order to compensate for the depth overestimate inherent in using stacking velocities to calculate total sediment thickness.

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Title Time-Depth Functions for the Otway Basin
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/48b0a088-c0d5-49ab-845c-8261e3e6fad2
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[137.0, -42.5], [145.5, -42.5], [145.5, -36.75], [137.0, -36.75], [137.0, -42.5]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Time-Depth Functions for the Otway Basin". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/time-depth-functions-for-the-otway-basin

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