Seismic Grids and Fault data (VTT) Hydrocarbon Migration and Seepage in the Timor Sea and Browse Basin. An Integrated SAR and Geological Study GIS.

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.

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Dataset citation

ANZLIC unique identifier: ANZCW0703003347

Title: Seismic Grids and Fault data (VTT) Hydrocarbon Migration and Seepage in the Timor Sea and Browse Basin. An Integrated SAR and Geological Study GIS.

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Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia

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This is the interpretation of the Vulcan Tertiary Tie Project (VTT). This study carried out high resolution seismic acquisition programs, surveys 163VTT and 165VTT. These surveys where carried out over a 5000km grid. This seismic data was interpretated and sequence stratigraphic framework for this highly prospective, but geologically complex region.

More information can be found in the final report: AGSO Record 1996/91.

This metadata will only be focusing on the seismic (structure) grids and the intrepretated faults from the report. There is both raster and vector data.

The vector (polygons) data (faults) are located in:

"/timor_gis/geological/agso_vtt_flts".

The raster images (seismic structures BIL images) are located in:

"/timor_gis/grids/geological/agso_vtt".

ANZLIC search words:

ENERGY Petroleum Exploration
MARINE Mapping
MARINE Geology and Geophysics Research

Spatial domain:

locality map

Geographic extent name: AUSTRALIA INCLUDING EXTERNAL TERRITORIES - AUSAAT - Australia - Australia

Geographic extent polygon: 121 -8.7, 127.5 -8.7, 127.5 -17, 121 -17, 121 -8.7,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:: North bounding latitude: -8.7 °; South bounding latitude: -17 °; East bounding longitude: 127.5 °; West bounding longitude: 121 °

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Data currency

Beginning date: 2000-07-01

Ending date: 2000-11-05

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Dataset status

Progress: Complete

Maintenance and update frequency: Not Known

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Access

Stored data format:: DIGITAL - bil Band interleaved by line (BIL) image Geographic WGS84; DIGITAL - shp ArcView shape file ArcView Geographic WGS84

Available format type:: DIGITAL - shp ArcView shape file ArcView Geographic WGS84; DIGITAL - bil Band interleaved by line (BIL) image Geographic WGS84

Access constraints:

Licence required

Free Data Download

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Data quality

Lineage:

The original raw interpretation was done by AGSO in Geoquest. This interpretation was then imported into Petrosys where the final grids and vector data was made.

The vector data was then exported into ARCVIEW format (shape files).

Once the grids were finalised in Petrosys, they were then exported into ERMAPPER. Where there were converted into a format that ARCVIEW could read, BIL files. In ERMAPPER the grids where

modified only by there colour spread. The colour table used for all grids was, 'rainbow_reversed'.

Vector Data:

Faults - There is only polygon data. These are the actual faults interpretated from the original grids. The polygon data is to be used when displaying the BIL images. These shape files are easily represented by the names of the BIL images.

Raster data:

Time Structure - This represents the depth in two-way-time (TWT) of selected interpretated horizons. They can only be used for general usage, for they have no data attached to them, they are only georeferenced images.

Positional accuracy:

Both raster and vector data were originally made at 1:500000 scale. Any lower than that might distort the accuracy levels.

Vector Data - No analysis of the positional accuracy of any of the vector features has been undertaken, however due to the accuracy of the interpretation it can be considered that all vector features are within 100 metres of there true position.

Raster Data - All the raster images have a cell size of 500m. After the georeferencing of the images in ERMAPPER a positional accuracy can be 'estimated' within 100m. Each raster BIL file has a 'hdr' file. This is used to georeference the raster image.

Attribute accuracy:

Regarding the vector data the attributes are for naming purposes only. This naming of the horizons was up to the interpreter and is therefore not prone to any error.

The raster files have no attributes.

The classification of the horizon names are as follows:

call - Middle Callovian

eeoc - Early Eocene

epal - Base Early Paleocene

kimm - Middle Kimmeridgian

lmio - Late Miocene

moli - Middle Oligocene

tith - Middle Tithonian

tper - Near Top Permian

val - Middle Valanginian

Logical Consistency: