Combining Seismic Data from Passive and Active Sources for understanding the terrane structure of the Eastern Goldfields, Western Australia

2007 ◽  
Vol 2007 (1) ◽  
pp. 1-4
Author(s):  
Anya M. Reading ◽  
Erdinc Saygin ◽  
Brian L.N. Kennett ◽  
Bruce R. Goleby ◽  
Tanya Fomin ◽  
...  
Keyword(s):  
Western Australia ◽  
Seismic Data

THE M. AUSTRALIS SANDSTONES, DAMPIER SUB-BASIN, AUSTRALIA

1999 ◽  
Vol 39 (1) ◽  
pp. 104
Author(s):  
A.J. Crowley
Keyword(s):  
Mass Flow ◽  
Western Australia ◽  
Seismic Data ◽  
Shelf Break ◽  
Oil Fields ◽  
Reservoir Quality ◽  
Flow Deposit ◽  
Basin Floor ◽  
A Minor ◽  
Maximum Flooding Surface

Three independent Barremian sandstone units that are characterised by the M. australis palynozone have been identified in the Lewis Trough and Enderby Terrace of the southeastern Dampier Sub-Basin, offshore Western Australia. They constitute a basin-floor fan unit and shelfal transgressive unit that are characterised by the lower Af. australis sub-zone, a shelfal marine to fluvial unit that is characterised by the middle M. australis sub- zone and a shelfal marine unit that is characterised by the upper M. australis sub-zone. The M. australis sandstones are characterised by their excellent reservoir quality, generally common to abundant glauconite content and common provenance.Core, wireline log and seismic data from wells in the Lewis Trough indicate the sediments characterised by the lower M. australis sub-zone form a mass-flow deposit on the regionally extensive Intra-Muderong Hiatus. Transgressive shelfal greensands, interpreted to lie within the latter part of the lower M. australis sub-zone overlie the In tra-Muderong Hiatus on the Enderby Terrace. The glauconitic sandstones characterised by the middle M. australis sub-zone were deposited during a relative highstand and overlie a maximum flooding surface identified in wells on the southern Enderby Terrace. These deposits form the reservoir section for the Wandoo and Stag oil fields. At Wandoo they form a series of seismically definable progrades, whereas at Stag they are the distal toe-sets that lie sub-parallel to the underlying surface. The subsequent sequence boundary is identified in wells and on seismic data as an erosional surface cutting the underlying sediments. Glauconite-rich, transgressive deposits form a fining-up sequence overlie the sequence boundary. Glauconitic sandstones characterised by the upper M. australis sub-zone were deposited at the palaeo- shelf break during a minor regression.

Regional Sn velocities and shear velocity in the upper mantle

1973 ◽  
Vol 63 (2) ◽  
pp. 469-475
Author(s):  
Stephen Huestis ◽  
Peter Molnar ◽  
Jack Oliver
Keyword(s):  
Shear Wave ◽  
Western Australia ◽  
Upper Mantle ◽  
Seismic Data ◽  
Shear Velocity ◽  
Apparent Velocity ◽  
Mantle Structure ◽  
Uppermost Mantle ◽  
Seismic Shear ◽  
Upper Mantle Structure

abstract Determinations by various authors of the apparent velocity of the seismic shear wave Sn, which propagates in the uppermost mantle, are presented for several of the Earth's stable regions. Measurements of the velocity over two additional shield areas, India and Western Australia, were made and gave values of 4.72±0.03 km/sec and 4.75-4.87 km/sec, respectively. In general, the Sn velocity is greater than 4.7 km/sec. As the stable regions cover most of the Earth's surface and this velocity is representative of the shear velocity in the uppermost mantle, it is useful as a constraint in inversion of seismic data to determine upper-mantle structure.

The Western Australia Modeling project — Part 1: Geomodel building

2019 ◽  
Vol 7 (4) ◽  
pp. T773-T791 ◽  
Author(s):  
Jeffrey Shragge ◽  
Julien Bourget ◽  
David Lumley ◽  
Jeremie Giraud ◽  
Thomas Wilson ◽  
...  
Keyword(s):  
Western Australia ◽  
Seismic Data ◽  
Large Scale ◽  
Viscoelastic Model ◽  
Companion Paper ◽  
3D Seismic ◽  
Seismic Modeling ◽  
North West ◽  
Northern Carnarvon Basin ◽  
And Migration

A key goal in industry and academic seismic research is overcoming long-standing imaging, inversion, and interpretation challenges. One way to address these challenges is to develop a realistic 3D geomodel constrained by local-to-regional geologic, petrophysical, and seismic data. Such a geomodel can serve as a benchmark for numerical experiments that help users to better understand the key factors underlying — and devise novel solutions to — these exploration and development challenges. We have developed a two-part case study on the Western Australia (WA) Modeling (WAMo) project, which discusses the development and validation of a detailed large-scale geomodel of part of the Northern Carnarvon Basin (NCB) located on WA’s North West Shelf. Based on the existing regional geologic, petrophysical, and 3D seismic data, we (1) develop the 3D geomodel’s tectonostratigraphic surfaces, (2) populate the intervening volumes with representative geologic facies, lithologies, and layering as well as complex modular 3D geobodies, and (3) generate petrophysical realizations that are well-matched to borehole observations point-wise and in terms of vertical and lateral trends. The resulting 3D WAMo geomodel is geologically and petrophysically realistic, representative of short- and long-wavefield features commonly observed in the NCB, and leads to an upscaled viscoelastic model well-suited for high-resolution 3D seismic modeling studies. In the companion paper, we study WAMo seismic modeling results that demonstrate the quality of the WAMo geomodel for generating shot gathers and migration images that are highly realistic and directly comparable with those observed in NCB field data.

scholarly journals Targeting nickel sulfide deposits from 3D seismicreflection data at Kambalda, Australia

Geophysics ◽  
2012 ◽  
Vol 77 (5) ◽  
pp. WC123-WC132 ◽  
Author(s):  
Milovan Urosevic ◽  
Ganesh Bhat ◽  
Marcos Hexsel Grochau
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Seismic Data ◽  
Nickel Sulfide ◽  
Forward Modeling ◽  
Geometric Constraints ◽  
3D Seismic ◽  
High Quality ◽  
Sulfide Deposits ◽  
3D Seismic Data

The greenstone belts of the Yilgarn Craton, Western Australia, host numerous Archaean gold, nickel, and iron ore deposits. These deposits typically are found in complex geologic structures hidden by a deep, heterogeneous, and often conductive regolith profile. This added complexity limits the depth of penetration for the potential field methods, but at the same time opens new revenue possibilities through the application of seismic methods. To explore this opportunity, we acquired high-resolution, experimental, 3D seismic data over Lake Lefroy in Kambalda, Western Australia. The main objective was to map exceptionally complex, deep structures associated with Kambalda dome. Survey design used 3D ray tracing to improve the distribution of the common reflection points across ultramafic-basalt contacts which host numerous small, high-grade nickel sulfide deposits. A combination of small explosive sources, high-shot/receiver density, and exceptionally good coupling over the ultrasalty lake surface produced seismic data of very high quality. Processing focused on computation of accurate static and dynamic corrections, whereas imaging was helped by the existing geologic model. Advanced volumetric interpretation supported by seismic forward modeling was used to guide mapping of the main lithological interfaces and structures. Forward modeling was carried out using rock properties obtained from ultrasonic measurements and one borehole, drilled in the proximity of the 3D seismic volume. Using this information, geometric constraints based on the typical size of ore bodies found in this mine and a simple window-based seismic attribute, several new targets were proposed. Three of these targets subsequently have been drilled and new zones of mineralization were intercepted. The case study presented demonstrates that high-quality, high-resolution, 3D seismic data combined with volumetric seismic interpretation could become a primary methodology for exploration of deep, small, massive sulfide deposits distributed across the Kambalda area.

Basin architecture from high-resolution gravity gradient, magnetic, and seismic data, King Sound, Canning Basin, Western Australia

AAPG Bulletin ◽  
2013 ◽  
Vol 97 (10) ◽  
pp. 1597-1620 ◽  
Author(s):  
Peter Kovac ◽  
Sharon Lowe ◽  
Tony Rudge ◽  
Carlos Cevallos ◽  
Jurriaan Feijth ◽  
...  
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Seismic Data ◽  
Gravity Gradient ◽  
Canning Basin

scholarly journals CO2 Storage Site Characterisation using Combined Regional and Detailed Seismic Data: Harvey, Western Australia

2017 ◽  
Vol 114 ◽  
pp. 2896-2905 ◽  
Author(s):  
S. Ziramov ◽  
M. Urosevic ◽  
S. Glubokovskikh ◽  
R. Pevzner ◽  
K. Tertyshnikov ◽  
...  
Keyword(s):  
Western Australia ◽  
Seismic Data ◽  
Co2 Storage ◽  
Storage Site ◽  
Site Characterisation
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