Abstract

Geoscience Australia conducted a marine seismic survey (GA-0349) over poorly defined areas of the Houtman sub-basin (part of the Perth basin) between 15th of November to the 23rd of January 2015. The aim was to acquire high quality, industry-standard precompetitive 2D seismic data, Multi-beam echo-sounder (MBES) off the coast of Western Australia. The new seismic data will supplement existing geological knowledge of the region, underpin petroleum prospectivity evaluation and support the discovery of new oil gas resources.
Google map showing geographic bounding box with values North bound -21.68 East bound 114.6 West bound 110.63 South bound -28.78

Product Type/Sub Type

dataset

Constraints

Creative Commons Attribution-NoDerivatives 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (creation publication)

2016-01-01T00:00:00 2016-02-01T00:00:00

Product Type

dataset

Topic Category

geoscientificInformation

GA Catalogue Number

89855 Product http://www.ga.gov.au/metadata-gateway/metadata/record/89855/

Keywords

Marine Data
marine survey
seismics
prospectivity
Bathymetry
WA
Marine Geoscience

Resource Language

Resource Character Set

Resource Security Classification

Geographic Extent

North bound
-21.68
East bound
114.6
West bound
110.63
South bound
-28.78

Lineage

The Houtman 2D 2014 Seismic Survey, GA-0349 Duke/10046 was acquired by Geoscience Australia onboard the MV Duke from the 15th of November 2014 to the 23th of January 2015. The Chief scientist was Dr. Irina Borissova. This dataset was acquired by CGG onboard the MV Duke and processed in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. 1. First a vessel configuration file was created where the co-ordinates of the motion sensor and DGPS antenna and patch test offsets were recorded. 2. A new project was then created and the vessel configuration file was attached to the project file. 3. The raw swath sonar data, in raw.all format, for each line was then imported into the project and the vessel information assigned to the data. 4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artefacts. 5. Different sound velocity profiles data for each block were attached to the corresponding raw swath sonar data files to correct the depths for changes in the speed of sound through the water column. 6. Then a new blank field area was defined that specified the geographic area of study and the co-ordinate system used. The co-ordinates for the study areas were WGS84 UTM-49S and 50S. 7. The data was cleaned by applying several filters that removed any remaining spikes in the bathymetry data using user defined threshold values. A visual inspection of the data for each line was then undertaken where artefacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors modules of the Caris HIPS/SIPS software. 8. All the data for each bathymetric, motion sensor, DGPS, heading, tide and sound velocity profile data were merged to produce the final processed data file. A weighted grid of the processed data was then created for each Block. In GA the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artefacts and mismatches. 9. The processed data was finally exported as grids soundings or false colored images for presentation and reporting and as final processed data in ASCII XYZ as well as geotif formats of 15 and 25m resolution. 10-Using CARIS Base editor 4.0 the grids were exported as ESRI ASCII grid, then imported into ARC catalogue/info to create a raster file for the entire survey.

Digital Transfer Options

onLine

Distributor

Role
distributor
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Source Description

The multibeam bathymetry was acquired by the following survey: - Survey Name: Houtman Sub-basin 2D Seismic Survey 2014, (GA-0349/Duke10046) - High Resolution Bathymetry Grids - Vessel Name: MV Duke - Institution: Geoscience Australia - Country: Australia - Operator: Gardline CGG Pte Ltd. - Multibeam system: Kongsberg EM302 - Year of installation: 2011 - Nominal sonar frequency: 30 kHz - Number of beams: 288 beams/432 soundings - Beamwidth across track: 1 degree - Beamwidth along track: 1 degree - Pulse length: variable - Selectable depth range: 10m - 7000m - Vessel speed: 7 - 8 knots - Start Date: 15/11/2014 - End Date: 23/01/2015 - Start Port: Exmouth - End Port: Geraldton - Grid resolution: 15/25 m - Number of grids: 7 - Total surface coverage: 11,319.78 km2 - Vertical Datum: MSL - Horizontal Datum: WGS84 UTM-49S & 50S - Use Limitation: This dataset is not to be used for navigational purposes.

Metadata File Identifier

27756e98-01c5-c70d-e053-10a3070aeab8

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

METADATA SECURITY CLASSIFICATION

Metadata Contact

Role
custodian
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address