Data

Triassic Horizon Grids, Isochron Grids, and Fault Maps, Central North West Shelf

Geoscience Australia
Orlov. C. ; Abbott, S.T. ; Bernardel, G. ; Nicholson, C. ; Rollet, N. ; Nguyen, D. ; Gunning, M.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26186/5ce61be53badc&rft.title=Triassic Horizon Grids, Isochron Grids, and Fault Maps, Central North West Shelf&rft.identifier=10.26186/5ce61be53badc&rft.publisher=Commonwealth of Australia (Geoscience Australia)&rft.description=A regional mapping program conducted by Geoscience Australia addressed stratigraphic and structural aspects of exploration risk within the Triassic succession of the Roebuck Basin and parts of the adjacent sub-basins (central North West Shelf, Figure 1).Seismic horizons of regional significance were mapped using 2D and 3D seismic surveys. Seismic survey coverage is shown in Figure 1. 2D surveys include regional deep surveys such as AGSO s110, AGSO s120, and PGS New Dawn. 3D surveys include Admiral, Beagle, CNOOC, Curt, Lord, Naranco, Polly, Whitetail, and a 5 x 5 km extract (used with permission) from the TGS Capreolus MC3D. Synthetic seismograms (Nguyen et al., 2019) were used to tie seismic horizons to wells.The mapped horizons are placed within a regional tectonostratigraphic framework by Abbott et al. (2019, their Figure 2). This data pack comprises seismic horizon grids and isochron grids generated from the TR10.0_SB (base Triassic), TR17.0_SB (Mid–Triassic), and J10.0_SB (top Triassic) seismic horizons (Figure 2). Fault maps compiled at the TR10.0 _SB and J10.0_SB are also included.Maintenance and Update Frequency: asNeededStatement: Seismic horizons were mapped on 2D and 3D marine seismic surveys using GeoFrame and DUG Insight interpretation software. All horizon data was compiled in DUG Insight where 3D interpretation was given preference over less detailed 2D interpretation. Horizon and and isochron grids were generated in Petrosys software using a 1 km cell size, the standard gridding operation, a minimum-curvature gridding algorithm, and a smoothing value of 2. Horizon grid generation was constrained by faults. Grids were exported from Petrosys in ESRI BIL and ASCII XYZ formats. Fault polylines on 2D surveys were mapped in GeoFrame. Line spacing was often too coarse to map faults using 2D surveys. Fault polylines on selected 3D surveys were mapped in ArcGIS on seismic incoherence timeslices generated in DUG Insight. Fault maps were compiled as ArcGIS shapefiles using polylines from 2D and 3D surveys.&rft.creator=Orlov. C. &rft.creator=Abbott, S.T. &rft.creator=Bernardel, G. &rft.creator=Nicholson, C. &rft.creator=Rollet, N. &rft.creator=Nguyen, D. &rft.creator=Gunning, M. &rft.date=2019&rft.coverage=westlimit=115.4; southlimit=-19.9; eastlimit=121.5; northlimit=-15.1; projection=WGS 84 / UTM zone 50S (EPSG:32750)&rft.coverage=westlimit=115.4; southlimit=-19.9; eastlimit=121.5; northlimit=-15.1; projection=WGS 84 / UTM zone 50S (EPSG:32750)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=geoscientificInformation&rft_subject=Basin Analysis&rft_subject=EARTH SCIENCES&rft_subject=Petroleum and Coal Geology&rft_subject=North West Shelf&rft_subject=Roebuck Basin&rft_subject=Rowley Sub-basin&rft_subject=Bedout Sub-basin&rft_subject=Barcoo Sub-basin&rft_subject=Beagle Sub-basin&rft_subject=Exmouth Plateau&rft_subject=Triassic&rft_subject=Petroleum exploration&rft_subject=stratigraphy&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
Cite Saved to MyRDA Save to MyRDA

Licence & Rights:

Open Licence view details
CC-BY

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/

Australian Government Security ClassificationSystem
https://www.protectivesecurity.gov.au/Pages/default.aspx

Access:

Open

Full description

A regional mapping program conducted by Geoscience Australia addressed stratigraphic and structural aspects of exploration risk within the Triassic succession of the Roebuck Basin and parts of the adjacent sub-basins (central North West Shelf, Figure 1).

Seismic horizons of regional significance were mapped using 2D and 3D seismic surveys. Seismic survey coverage is shown in Figure 1. 2D surveys include regional deep surveys such as AGSO s110, AGSO s120, and PGS New Dawn. 3D surveys include Admiral, Beagle, CNOOC, Curt, Lord, Naranco, Polly, Whitetail, and a 5 x 5 km extract (used with permission) from the TGS Capreolus MC3D. Synthetic seismograms (Nguyen et al., 2019) were used to tie seismic horizons to wells.

The mapped horizons are placed within a regional tectonostratigraphic framework by Abbott et al. (2019, their Figure 2). This data pack comprises seismic horizon grids and isochron grids generated from the TR10.0_SB (base Triassic), TR17.0_SB (Mid–Triassic), and J10.0_SB (top Triassic) seismic horizons (Figure 2). Fault maps compiled at the TR10.0 _SB and J10.0_SB are also included.

Lineage

Maintenance and Update Frequency: asNeeded
Statement: Seismic horizons were mapped on 2D and 3D marine seismic surveys using GeoFrame and DUG Insight interpretation software. All horizon data was compiled in DUG Insight where 3D interpretation was given preference over less detailed 2D interpretation. Horizon and and isochron grids were generated in Petrosys software using a 1 km cell size, the standard gridding operation, a minimum-curvature gridding algorithm, and a smoothing value of 2. Horizon grid generation was constrained by faults. Grids were exported from Petrosys in ESRI BIL and ASCII XYZ formats. Fault polylines on 2D surveys were mapped in GeoFrame. Line spacing was often too coarse to map faults using 2D surveys. Fault polylines on selected 3D surveys were mapped in ArcGIS on seismic incoherence timeslices generated in DUG Insight. Fault maps were compiled as ArcGIS shapefiles using polylines from 2D and 3D surveys.

Notes

Purpose
Pre-competitive data package release

Created: 27 05 2019

Issued: 23 05 2019

Modified: 30 05 2019

Modified: 22 09 2019

Modified: 23 09 2019

Data time period: 2019-05-23 to 2019-05-23

This dataset is part of a larger collection

Click to explore relationships graph
Help

Related People

121.5,-15.1 121.5,-19.9 115.4,-19.9 115.4,-15.1 121.5,-15.1

118.45,-17.5

text: westlimit=115.4; southlimit=-19.9; eastlimit=121.5; northlimit=-15.1; projection=WGS 84 / UTM zone 50S (EPSG:32750)

Subjects
Barcoo Sub-basin | Basin Analysis | Beagle Sub-basin | Bedout Sub-basin | EARTH SCIENCES | Exmouth Plateau | North West Shelf | Petroleum and Coal Geology | Petroleum exploration | Published_External | Roebuck Basin | Rowley Sub-basin | Triassic | geoscientificInformation | stratigraphy |

User Contributed Tags    

Login to tag this record with meaningful keywords to make it easier to discover

Other Information
Download the data pack

url : https://d28rz98at9flks.cloudfront.net/128417/128417.zip

Identifiers
ACN 633 798 857