Shotpoint database

PIRSA Petroleum and Geothermal Group’s shotpoint database is a comprehensive digital data set of shotpoint locations and associated attribute data from over 750 surveys carried out since 1955 in the state and adjacent waters to latitude 40ºS. It includes a total of over 277 000 km of 2D seismic data and 8500 km² of 3D seismic data. This data is maintained in ArcInfo where complex GIS analysis and modelling can be performed with other digital data sets. The index to this data and summary information are available in PEPS.

Digital data are available for purchase in various formats on CD or DVD. As an example, the Cooper Basin shotpoint database costs A$75 for the coordinate data for ~100 000 km of seismic lines. Specific hardcopy maps can be prepared for any area upon request.

Seismic section database

A comprehensive database exists for the entire library of ~37 000 hardcopy seismic sections. Key attribute data such as scale, date of processing, processing contractor, form of processing and shotpoint range have been captured for each section and are available as a module of PEPS. All seismic sections have been scanned and are available as TIFF images. This digital data set comprises over 170 GB and is set up to allow rapid provision of data to customers. Since ~1995, displays of processed seismic sections have been submitted in digital (CGM) format. Sections are now available in digital form (as CGM or TIFF files) for A$5 per line.

Seismic stack (archive SEG Y) database

Cooper / Eromanga

Santos Ltd has provided PIRSA with a copy of its workstation files of 2D seismic and well data covering the former Petroleum Exploration Licences 5 and 6 in the Cooper and Eromanga basins. These data are now available to other explorers. The seismic set includes workstation-loaded data for over 5000 seismic lines from the period 1975–2000; the well data set covers 1300 wells. The seismic data was originally supplied as multiple GeoFrame project files, but these have been converted to a SEG Y output format suitable for loading onto a range of software platforms. The key attributes of this data include provision of multiple data classes, resolution of all bulk shifts/ties and provision of coordinates (GDA94 datum) in the trace headers. A separate GeoFrame project file exists for well data, containing well logs, stratigraphic markers (including formation tops), deviation surveys, drillstem tests, check shots, and information on cores, cuttings and palynological sampling.

Data are available on a range of media, including USB portable hard drive, for A$1000 for the entire set.

Onshore Otway Basin

PIRSA has recently created a GeoFrame project of all relevant 2D seismic data for the onshore Otway Basin. At least one version of each available line is provided in the data set that contains some 720 lines ranging in vintage from 1974 to 2004. This data is available in either GeoFrame or SEG Y format. The key elements of this data set includes the resolution of ties and bulk shifts, standard TFS (time of first sample) and GDA coordinates inserted into standard trace header locations.

Rest of the state

Original archive SEG Y data for seismic lines from other petroleum prospective areas is also available including the Officer, Pedirka and Eromanga basins onshore, and Bight, Duntroon and Otway basins offshore. Unlike the Cooper–Eromanga data set, this data has not been subjected to editing and remains in its original form as submitted.

2D SEG Y data for these lines is available at A$5 per file.

Field Seismic data

An archive collection of digital and analogue seismic field records is held by PIRSA for almost all seismic lines recorded onshore in South Australia. Digital records are stored on Exabyte or 3590 tapes in SEG Y, or as an original SEG field format.

Copy costs are A$10 per 2D line or A$100 per input 3D tape, plus consumables (tapes).

Ancillary data

There is an extensive collection of field support data that complements the seismic field tapes and facilitates reprocessing of the seismic field records. This includes observers logs, surveyors notes, uphole data, mudmaps, listings etc. The majority of the data is held on a line-by-line basis and is supplemented by survey general dossiers.

Some 250 000 pages of these ancillary seismic field documents have been scanned, covering the key hardcopy material stored. The scanned images have been captured as multi-page TIFF files and collated on a line-by-line basis.

Copy costs are A$5 per seismic line.

Seismic survey reports

All relevant seismic survey reports (operational and interpretive) have been scanned. The open file reports are available as bookmarked multi-page PDF files (with plans embedded) on CD. Copy costs are A$10 per report.

Mapping

Regional interpretations of basin structure have been completed for the major onshore basins (including Cooper, Eromanga, Pedirka–Simpson and Otway) and parts of the offshore Otway basin. These projects have consolidated open file basic and interpreted data into coherent data sets.

The South Australian Cooper Basin seismic mapping data package, covering many horizons and isopachs, contains 64 digital data sets and costs A$7000 for all data files. The package includes depth maps, which have been correlated with well depth. Individual files are available for A$150–$300 each. A folio of maps is available for A$200 per CD or A$600 per hardcopy volume.

PIRSA has also mapped the Eromanga and Pedirka basins within South Australia. Similar mapping products are available as for the Cooper Basin, with individual map files available for A$200–$300, or A$6000 for all 40 data files. Hardcopy maps are available for A$60.

 
The South Australian Cooper and Eromanga data sets have been merged with similar data sets from Queensland, Northern Territory and New South Wales in a National Geoscience Mapping Accord project. Three horizon maps and three isopach maps have been produced for the C, P and Z horizons. These vast data sets are available for A$1800 per file, A$200 per hardcopy map or A$900 for plot or PDF files.

The Otway Basin data set covering on and offshore areas was upgraded in 2000 to incorporate information recorded between 1992 and 1998. Four depth and time horizons and complementary isopachs are available for A$120 per grid or contour file, or A$1200 for all 24 files. Hardcopy maps or plot files are available for A$60 each, or A$350 for all 13 depth and isopach contour maps.

Uphole database

An extensive database of all known seismic uphole data within the state is maintained and available from PEPS. The data comprises hole location, seismic line reference, time–depth pairs, elevation and, where available, lithologies intersected. The data is used for processing corrections of seismic field data, and is available as an ASCII file or as a stand-alone database in Paradox format. Attributes for over 47 000 upholes are held in the database. The data are available on CD at a cost of A$100 for the entire module.