Authors / CoAuthors
Jones, L.E.A.
Abstract
Geoscience Australia undertook a marine survey of the Leveque Shelf (survey number SOL5754/GA0340), a sub-basin of the Browse Basin, in May 2013. This survey provides seabed and shallow geological information to support an assessment of the CO2 storage potential of the Browse sedimentary basin. The basin, located on the Northwest Shelf, Western Australia, was previously identified by the Carbon Storage Taskforce (2009) as potentially suitable for CO2 storage. The survey was undertaken under the Australian Government's National CO2 Infrastructure Plan (NCIP) to help identify sites suitable for the long term storage of CO2 within reasonable distances of major sources of CO2 emissions. The principal aim of the Leveque Shelf marine survey was to look for evidence of any past or current gas or fluid seepage at the seabed, and to determine whether these features are related to structures (e.g. faults) in the Leveque Shelf area that may extend to the seabed. The survey also mapped seabed habitats and biota to provide information on communities and biophysical features that may be associated with seepage. This research, combined with deeper geological studies undertaken concurrently, addresses key questions on the potential for containment of CO2 in the basin's proposed CO2 storage unit, i.e. the basal sedimentary section (Late Jurassic and Early Cretaceous), and the regional integrity of the Jamieson Formation (the seal unit overlying the main reservoir). This dataset comprises sparker sub bottom profiles processed as shallow, high resolution, multichannel seismic reflection data (SEG-Y format), navigation files (P190) and stacking velocities.
Product Type
dataset
eCat Id
78880
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- Marine DataSub bottom profiles
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- geological storage of CO2
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- marine survey
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- seismic reflection
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- seismic sections
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- marine
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- WA
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_External
Publication Date
2014-01-01T00:00:00
Creation Date
Security Constraints
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Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
Acquisition and processing of the sub bottom profiler data is summarised in the 40 card EBCDIC reel header in each SEG-Y file according to the SEG-Y standard, and reproduced below for line GA0340_019. C1 FINAL SUB-BOTTOM PROFILER DATA PROCESSED BY GEOSCIENCE AUSTRALIA JUNE 2013 C2 DATA ACQUIRED BY GEOSCIENCE AUSTRALIA ON AIMS RESEARCH VESSEL SOLANDER C3 SURVEY NO. : GA0340 SURVEY NAME : BROWSE BASIN MARINE C4 LINE NO. : GA0340_019 GPS HEADING : 305 DEGREES C5 RECORDING PARAMETERS C6 SYSTEM : SEISMODULE DATE RECORDED : MAY 2013 C7 RECORDING GAIN: CHAN 1-24 0 dB C8 RECORDING FILTERS : LOW-CUT 0 HZ, HIGH-CUT 0 HZ, NOTCH OUT C9 SAMPLE RATE : 0.125 MS RECORD LENGTH : 0.5 s C10 NO. CHANNELS : 24 DATA FORMAT : SEGY Revision 0 ON DISK C11 SOURCE TYPE : SQUID 2000 SPARKER, CSP-D GENERATOR AT 2000 JOULES (Hi 10) C12 SOURCE OFFSET : 6.5 M PERPENDICULAR SOURCE LAYBACK : 20 M C13 SOURCE DEPTH : 0.5 M (APPROX) SP INTERVAL : 6.25 M C14 CABLE MODEL : GEOMETRICS MICROEEL GROUP INTERVAL : 3.125 M C15 CABLE LAYBACK : 45 M CABLE DEPTH : 2.5 M (APPROX) C16 NEAR CHANNEL : 1 (APPROX 26 M) FAR CHANNEL : 24 (APPROX 97 M) C17 CMP SPACING : 1.5625 METRES COVERAGE : 6 FOLD C18 FINAL PROCESSING SEQUENCE : STACK 0.5 s, 0.25 ms C19 1: Dummy line geom (CDP int 1.5625 m), corrected for missing SP as needed C20 2: SEGY to 'disco' internal format C21 3: Mute of leaked timing pulse and first arrivals C22 4: Band pass filter 80/30 to 1500/72 (Hz/dB per octave) C23 5: Whole trace amplitude balance C24 6: Offset calculation, with lateral offset & yaw correction C25 7: Dip based offset regularisation to integer values of offset C26 8: Surface related multiple elimination (SRME) C27 9: Common midpoint sort C28 10: NMO correction (20% stretch mute), velocity function hung from WB C29 11: Trim statics on window keyed to strongest reflectors C30 12: AGC (25 ms gate) C31 13: Common mid point stack C32 14: Tailored water bottom mute (bytes 111-112) C33 15: FX-decon and run mix C34 16: Trace amplitude scaling (20 ms gate AGC, 50% whole trace weighting) C35 17: Resample at 0.25 ms C36 18: Application static for S & R depth and tide relative to MSL C37 19: SEG-Y (Revision 1) output C38 CDP coordinates in P190 file; navigation and tides derived from CNAV C39 GADA, ENERGY DIVISION; COPYRIGHT COMMONWEALTH OF AUSTRALIA (GEOSCIENCE C40 AUSTRALIA) 2013, CREATIVE COMMONS ATTRIBUTE 3.0 AUSTRALIA LICENCE
Parent Information
Extents
[-16.1, -15.45, 121.1, 121.75]
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