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Resolving Structural Uncertainty using DAS VSP Survey in Central Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Konstantin Galybin, Cameron Jones, Frank Nicholson, Ryan Chapman, Rob Twigg
- Date Published: September 2019
Abstract:
Borehole seismic technology provides an efficient way to image the subsurface in high-resolution, through 3D, Walkaway or Offset VSPs. Whilst acquisition time of the conventional VSP survey is less than surface seismic, such VSP surveys can take hour...
Low-Base Frequency Helicopter AEM Data from a Square-Wave System – Helitem2
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Adam Smiarowski, Graham Konieczny
- Date Published: September 2019
Abstract:
Exploration for targets at depth or targets obscured by conductive overburden have historically been a challenge with airborne EM methods. Although modern systems have been improved with greater primary transmitter moments, noise from receiver coil m...
Observations of geophone spurious resonance
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Hearn*, Shaun Strong, Andrew Kinmont
- Date Published: September 2019
Abstract:
A detailed understanding of the frequency response of geophones is critical for the design and quality control of broadband seismic surveys. We illustrate a pragmatic methodology for accurate identification of geophone spurious resonances. We include...
Seismic evidence for seal and reservoir in the Late Cretaceous Ceduna Delta, Great Australian Bight
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ben Tredrea*, Phillip Horton
- Date Published: September 2019
Abstract:
The Ceduna Sub-Basin contains a large and underexplored Jurassic - Cretaceous rift, located within the Great Australian Bight Basin. Limited exploration to date has targeted the Late Cretaceous Hammerhead and Tiger Super sequences (SS) of the Ceduna ...
Bayesian joint inversion of controlled source electromagnetic and magnetotelluric data to infer presence of a freshwater aquifer offshore New Jersey
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Daniel Blatter, Kerry Key, Anandaroop Ray*, Chloe Gustaffson, Rob Evans
- Date Published: September 2019
Abstract:
To evaluate the extent of a low salinity aquifer within the continental shelf offshore New Jersey, USA, we adapt a Bayesian trans-dimensional Markov chain Monte Carlo (McMC) algorithm for jointly inverting surface towed controlled source electromagne...
Using network topology to constrain fracture network permeability
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Rowan Hansberry*, Simon Holford, Rosalind King, Natalie Debenham
- Date Published: September 2019
Abstract:
Predicting the interconnectivity and permeability of fractures at any scale remains a fundamental challenge in structural geology. Models which predict the likelihood of fracture opening based on their relation to the stress field can be applied at s...
West Australian gold resources: crisis or hubris?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Julian Vearncombe*
- Date Published: September 2019
Abstract:
Criticism of the exploration and mining industry for failing to find enough new deposits and open new mines is misplaced. Significant growth in the size of gold Resources on many mines of the Yilgarn Craton has occurred well after the deposit was dis...
Characterising lithium host minerals within the lateritic duricrust, Greenbushes, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sophie Vuleta*, Monica LeGras, Raymond E. Smith, Carsten Laukamp, Louise Schoneveld, Ravi Anand
- Date Published: September 2019
Abstract:
Whilst detailed geochemical analyses have been conducted to mitigate the complications regolith cover poses to modern exploration efforts, less attention has been directed to the mineralogical associations that exist between lateritic residuum and po...
Application of high-end seismic imaging technologies for field development in NWS Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Min Lee Chua, Kai Zhao, Narcisa Lazarescu, Wai King Yong, Sergey Birdus, Alexey Artemov, Xiang Li
- Date Published: September 2019
Abstract:
The North West Shelf, situated in the north-west of Western Australia, is a world-renowned offshore hydrocarbon province with investments of more than A$200 billion to date. However, the quality of the legacy seismic often suffersfrom severe residual...
Investigating rock micro-structure of sandstones by pattern recognition on their X-ray images
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ankita Singh, Ryan Armstrong, Klaus Regenauer-Lieb, Peyman Mostaghimi
- Date Published: September 2019
Abstract:
Analysing rock micro-structure from micro-computed tomographic images of porous media is vital to understand fluid-flow and estimating petrophysical properties like permeability. The two main approaches of analysing rock micro-structure are (1) throu...
Mapping sub-volcanic geology using magnetic data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Irena Kivior, Stephen Markham*, Shiferaw Damte
- Date Published: September 2019
Abstract:
Volcanic layers within sedimentary basins cause significant problems for petroleum exploration because the attenuation of the seismic signal masks the underlying geology.
A test study was conducted for the South Australia Government to map t...
Improved HSEQ and survey efficiency demonstrated with a new remotely operated streamer cleaning tool
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Rune Tønnessen, Trygve Skadberg, James Wright, Andrew Long*
- Date Published: September 2019
Abstract:
Barnacle growth on seismic streamers creates noise on the recorded signals. Keeping a low noise level in barnacle areas is challenging to seismic crews: Frequent workboat trips are required for streamer cleaning, and workboat operations are weather-d...
Viability of long-short term memory neural networks for seismic refraction first break detection – a preliminary study
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tasman Gillfeather-Clark*, Eun-Jung Holden, Daniel Wedge, Tom Horrocks, Carlie Byrne, Matthew Lawrence
- Date Published: September 2019
Abstract:
Seismic data processing and analysis focuses on identifying the arrival of seismic waves or ‘first-breaks’. The identification of the arrival of first breaks is complicated by the variance of recording quality typically found across the dataset. ...
Groundwater applications of towed TEM in diverse geology at farm scale
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David Allen
- Date Published: September 2019
Abstract:
Vehicle towed transient TEM systems have opened up possibilities of comprehensive mapping of groundwater resources at farm scale. At this scale airborne TEM usually has too much setup cost and conventional TEM conducted on foot is usually too lab...
Regional Stratal Slice Imaging of the Northern Carnarvon Basin, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tony Marsh, Anne Powell
- Date Published: September 2019
Abstract:
Chevron has developed a method for merging, viewing, and interpreting multiple 3D seismic surveys in stratal slice domain. The products of this method are referred to as Regional Stratal Slice Volumes (RSSVs). Within the Northern Carnarvon Basin (NCB...
Co-operative inversion of geoelectrical data sets acquired from different electrode arrays
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Duy Thong Kieu*, Thi Chinh Truong
- Date Published: September 2019
Abstract:
Direct current resistivity (DCR) method is one of the most commonly applied geophysical exploration methods. The development of data acquisition techniques enables the acquisition of multiple data sets of various electrode arrays with a little extra ...
Structural modification of the Jaguar VHMS Zn-Cu-Ag deposits, Yilgarn Craton, W.A.
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jonathan Standing, David Potter
- Date Published: September 2019
Abstract:
The Jaguar VHMS camp represents a cluster of small sub-sea-floor replacement style VHMS deposits sandwiched between two closely spaced, craton-scale, shear zones. Despite preserving evidence for growth faults and feeder structures, the country rocks ...
Assessing mineral composition and permeability of a shale seal
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Roman Beloborodov, Marina Pervukhina*, Maxim Lebedev, Juerg Hauser
- Date Published: September 2019
Abstract:
Predicting the mineralogical composition of shales is crucial for drilling operations related to hydrocarbon exploration/production as well as for the assessment of their sealing capacity as hydrocarbon or CO2 barriers. Despite the importance of infe...
Yamarna Geology: Foundations for Further Discovery
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Janet Tunjic*, John Donaldson, Justin Osborne, Clayton Davy’s, Rick Berg
- Date Published: September 2019
Abstract:
World-class gold discoveries are being made in the Yamarna Terrane, one of the least understood terranes of the Yilgarn Craton. Despite many and varied challenges, Gold Road are in the unique position of compiling and constructing the stratigraphic m...
What will it take to improve the characterisation of deep mineral deposits in order to assess “economic value” early in the discovery process?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Joe Cucuzza*
- Date Published: September 2019
Abstract:
In Australia, in particular, the consensus is that most, if not all, of the world-class non-ferrous mineral deposits that are either at or near the surface have been found. This means that we need to look deeper in the new greenfield search space cha...
Twenty years of pre-competitive geoscience data in the Capricorn Orogen: the link between mineral systems and crustal evolution
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Simon P. Johnson
- Date Published: September 2019
Abstract:
State- and federal-generated pre-competitive geoscience data is critical for exploration success. These relatively low-cost but high-quality regional-scale datasets ultimately reduce the financial risk to explorers by reducing the search space and al...
The mineral factory: how to build a giant quartz reef
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Lisa Tannock*, Marco Herwegh, Alfons Berger, Klaus Regenauer-Lieb
- Date Published: September 2019
Abstract:
Giant quartz reefs can develop as part of a larger scale ‘mineral factory’ within a specific space and time, due to a series of interlinking processes and mechanisms. Ascertaining the criteria for giant quartz reef formation is based on data obta...
Adapting agile workflows to accelerate geoscience study results
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Lendyn Philip
- Date Published: September 2019
Abstract:
Woodside Exploration routinely conducts large regional study projects to inform business decisions regarding new acreage, data acquisition and drilling. Whilst varied, these studies generically comprise phases of data collection and conditioning, ana...
The road to Dorado: factors leading to a play-opening hydrocarbon discovery
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Fred Wehr
- Date Published: September 2019
Abstract:
This presentation describes the events leading up to the Dorado oil discovery made by Quadrant Energy and Carnarvon Petroleum in late 2018. ...
Reliable 1D magnetotelluric probabilistic inversion considering modelling assumption violations
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Hoël Seillé, Gerhard Visser
- Date Published: September 2019
Abstract:
A comprehensive understanding of the sources of uncertainty is essential in stochastic inversion workflows of magnetotelluric data. Input uncertainty related to the electromagnetic noise and measurement biases can be reliably estimated statistically ...
Passive seismic HVSR surveying for groundwater exploration at the Chilalo Graphite Project, Tanzania
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sharna Riley*, Jayson Meyers, John Sinnott
- Date Published: September 2019
Abstract:
Passive seismic HVSR surveying is increasingly being used for investigating the thickness of soft sedimentary cover deposits sitting over hard and fresh bedrock, and for direct drill targeting of paleochannels for groundwater and brine resources. A d...
A geological pressure model for the Browse Basin and the southern Vulcan Sub-Basin, NWS Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jakob Heller, Toh Shi-Yuan*, Alex Edwards
- Date Published: September 2019
Abstract:
The results presented in this paper draws on a regional pressure analysis of the offshore areas of the Browse Basin and the southern Vulcan Sub-Basin. ...
X-ray computerised tomography for fracture and facies characterisation and slab orientation in cores stored within aluminium tubes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Lionel Esteban*, Ishtar Barranco, Joel Sarout
- Date Published: September 2019
Abstract:
A 3D image of a whole core section can be generated by stacking contiguous cross-sectional slices from Medical X-ray Computerised Tomography (Medical XCT). This methodology was applied in cores sealed within aluminium barrels allowing selective and o...
Delineating cobalt targets from a galvanic and inductive source Sub-Audio Magnetics (SAM) at the Carlow Castle project, Western Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Daniel Eremenco*, Russell Mortimer, Ed Mead
- Date Published: September 2019
Abstract:
The Carlow Castle deposit is located 40 kilometres east of Karratha, Western Australia. The deposit is shear hosted in the Ruth Well Mafic Formation, part of the Roebourne Group. It is interspersed with metagabbro intrusions and brecciated chert cata...
Ultrasonic wave velocities measurements and seismic anisotropy at Karari gold deposit: Implications for gold exploration
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Andre Eduardo C.M. de Souza*, Stephanie Vialle, Andrej Bona
- Date Published: September 2019
Abstract:
In order to understand the nature of reflections imaged by reflection seismic data in hard-rock environment and to investigate the seismic anisotropy across the Karari gold deposit, ultrasonic velocity measurement and seismic anisotropy studies were ...