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Magnetic characterisation of the Osborne IOCG: magnetic fabrics, self-demagnetisation, and remanence: Cloncurry District, QLD
- Publication Name: AEGC 2021
- Authors: Andreas Bjork, Jim Austin, Helen McFarlane
- Date Published: September 2021
Abstract:
Integrated petrophysics linked with structural geology and mineralogy are powerful tools for mineral system characterisation. In this study, open-pit samples and drill core from the Osborne IOCG deposit were measured for anisotropy of magnetic suscep...
The resistivity structure of the Gidyea Suture and its relationship to the Carpentaria Conductivity Anomaly
- Publication Name: AEGC 2021
- Authors: Janelle Simpson, Dominic Brown, Karen Connors
- Date Published: September 2021
Abstract:
The Gidyea Suture is a structure that lies on the eastern margin of the Mount Isa Province. It was first recognised in deep crustal seismic, and subsequent authors have used magnetotelluric (MT) data to further support its existence. It is considered...
Continental shelf marine MT feasibility study in the Spencer Gulf, South Australia
- Publication Name: AEGC 2021
- Authors: Graham Heinson, Kate Robertson, Goran Boren, Steven Constable, Jacob Perez, Stephan Thiel, Jingming Duan, Darren Kyi
- Date Published: September 2021
Abstract:
Data from 12 new marine magnetotelluric (MT) stations have been acquired on the ocean-bottom of the Spencer Gulf, extending the land MT profile that crosses the Eyre Peninsula. The primary goal of the project was to determine the feasibility of colle...
Gaining value from historical AEM data
- Publication Name: AEGC 2021
- Authors: Shane Mulè, Tim Munday
- Date Published: September 2021
Abstract:
Australia is covered with a significant number of AEM surveys, primarily acquired over the last three decades. Most of these data were collected with now obsolete systems or system variants. Unfortunately, many of these historical datasets contain un...
Predicting fluid pathways in large discontinuity systems using graph theory
- Publication Name: AEGC 2021
- Authors: Ulrich Kelka Stefan Westerlund Thomas Poulet Luk Peeters
- Date Published: September 2021
Abstract:
Fracture networks and fault zones play an important role for subsurface fluid flow. Estimating the impact on the permeability field of such structures is of high interest for reservoir characterization, groundwater management, and exploration targeti...
A new era for the Australian National Gravity Grids – adding airborne data to the mix
- Publication Name: AEGC 2021
- Authors: Richard Lane, Yvette Poudjom Djomani, Phillip Wynne
- Date Published: September 2021
Abstract:
Since 1976, Geoscience Australia has produced grids of gravity anomalies to support geological mapping and exploration applications across Australia. The five editions of the national grids up to 2016 have been based on ground gravity observations, s...
Lithospheric resistivity structures and mineral prospectivity from AusLAMP data in northern Australia
- Publication Name: AEGC 2021
- Authors: Jingming Duan, Darren Kyi, Wenping Jiang, Michael Doublier, Alison Kirkby
- Date Published: September 2021
Abstract:
Magnetotelluric (MT) data allow geoscientists to investigate the link between mineralisation and lithospheric-scale features and processes. In particular, the highly conductive structures imaged by MT data appear to map the pathways of large-scale pa...
Diagenetic controls on the reservoir quality of organic-rich shales of the Mesoproterozoic Velkerri Formation (Beetaloo Basin)
- Publication Name: AEGC 2021
- Authors: Claudio Delle Piane, Colin MacRae, William Rickard, Vincent Crombez, Mohinudeen Faiz, David N. Dewhurst
- Date Published: September 2021
Abstract:
This contribution focuses on the organic rich intervals of the prospective Mesoproterozoic Velkerri Formation from the Beetaloo Sub-basin, part of the greater McArthur Basin (Northern Territory). It is based on the integration of petrophysical measur...
Deciphering the building blocks of the eastern North Australia Craton
- Publication Name: AEGC 2021
- Authors: Karen Connors, Janelle Simpson, Dominic Brown
- Date Published: September 2021
Abstract:
Interpretation of the nature and extent of basement rocks in many regions is hampered by lack of exposure and because potential field data tend to reflect the signatures of overlying upper crustal units, highlighting the need for tools that image dee...
The Do-It-Yourself Geophysicist
- Publication Name: AEGC 2021
- Authors: Anton Kepic
- Date Published: September 2021
Abstract:
The proliferation of open software and hardware, such as Micropython and other GNU-based licensing of generic embedded computing platforms provides largely readymade data acquisition and data fusion platforms that allow many geophysicists to make the...
An inventory of peralkaline rocks in Queensland for evaluation of REE enrichment potential
- Publication Name: AEGC 2021
- Authors: David Purdy, Bob Bultitude, Dominic Brown
- Date Published: September 2021
Abstract:
Highly fractionated peralkaline rocks are globally important sources of rare earth elements and other critical or new economy metals. Such metals are vital for technological advancement and a transition to a clean energy future and are therefore pred...
How deep does ground EM see?
- Publication Name: AEGC 2021
- Authors: Andrew Fitzpatrick, Mike Whitford, Antonio Huizi
- Date Published: September 2021
Abstract:
Nickel exploration routinely utilises electromagnetic techniques as a direct detection tool. In the Australian context, conductive regolith dominated terrains reduces the depth of penetration of electromagnetic techniques. Modelling is typically perf...
Practical aspects of wavefield decomposition for permanent seismic rotatory sources
- Publication Name: AEGC 2021
- Authors: Roman Isaenkov, Sinem Yavuz, Roman Pevzner, Konstantin Tertyshnikov, Julia Correa, Barry Freifeld
- Date Published: September 2021
Abstract:
Continuous reservoir surveillance requires permanent seismic sources. One such source is a seismic orbital vibrator (SOV). An SOV excites a circularly polarised seismic signal by the rotation of an eccentric mass alternately clockwise and counter-clo...
Estimate elastic moduli of arenites from micro-tomographic images with digital rock physics
- Publication Name: AEGC 2021
- Authors: Jiabin Liang, Boris Gurevich, Maxim Lebedev, Stephanie Vialle, Alexey Yurikov, Stanislav Glubokovskikh
- Date Published: September 2021
Abstract:
Numerical computation from high resolution 3D microtomographic (micro-CT) images of rocks (known as digital rock physics) has the potential to predict elastic properties more accurately. However, successful examples are limited to samples with simple...
Targeting Fractured Rock Aquifers using Magnetic Data
- Publication Name: AEGC 2021
- Authors: Heather Ballantyne, Karen Gilgallon, Sharon Lowe
- Date Published: September 2021
Abstract:
Fractured Rock Aquifers are an important source of water with approximately 40% of groundwater in Australia present in fractured rock. The water extracted from fractured rock aquifers is utilised in mining, irrigation, town water supply and stock wat...
Laboratory measurements of seismic properties and forward seismic modelling at the Thunderbox gold mine, in Western Australia
- Publication Name: AEGC 2021
- Authors: Andre Eduardo C. M. Souza, Stephanie Vialle, Joel Sarout, Mustafa Sari
- Date Published: September 2021
Abstract:
Laboratory measurements on 126 samples and forward seismic modelling over a 2D geologic representation of the Thunderbox gold mine, in Western Australia, were conducted to investigate the seismic response of the gold-hosting rocks and structures at t...
Enhancing interpretation of geophysical models using petrophysical logging
- Publication Name: AEGC 2021
- Authors: Cericia Martinez, Shane Mulè, Teagan Blaikie, Jelena Markov
- Date Published: September 2021
Abstract:
Direct petrophysical measurements, such as density and magnetic susceptibility, may prove useful in improving the interpretability of geophysical models. With measurements becoming more abundant and the capability to measure petrophysical properties ...
Curtin In-Situ GeoLab – advancing geophysical sensing
- Publication Name: AEGC 2021
- Authors: K. Tertyshnikov, S. Zulic, A. Yurikov, S. Yavuz, E. Sidenko, R. Isaenkov, R. Pevzner
- Date Published: September 2021
Abstract:
The Distributed Acoustic Sensing (DAS) is a novel approach in sensing which constantly increasing its presence in various geophysical applications. It is paramount to understand the measurements, their limitations and performance of the technology fo...
Comparative Hydrogeological Characterisation of the Springbok and Precipice Sandstones
- Publication Name: AEGC 2021
- Authors: O. Gaede, P. Asmussen, D. Murphy
- Date Published: September 2021
Abstract:
The Springbok Sandstone (Surat Basin, Australia) overlies the Walloon Subgroup, which is a significant target for Coal Seam Gas (CSG) production. In order to assess and mitigate possible groundwater impact of CSG production, it is critical to define ...
Subsurface characterisation using full waveform inversion of vertical seismic profile data: Example from the Curtin GeoLab well
- Publication Name: AEGC 2021
- Authors: S. Zulic, A. Bona, K. Tertyshnikov, A. Yurikov, R. Pevzner
- Date Published: September 2021
Abstract:
Full-waveform inversion (FWI) uses the complete seismic wavefield (transmitted, reflected and converted waves) to build the models of subsurface physical properties. We conducted a feasibility study of a 2D elastic FWI applied to the synthetic and fi...
Magnetic inversion constrained by probabilistic magnetotellurics models: methodology and application
- Publication Name: AEGC 2021
- Authors: J. Giraud, H. Seillé, V. Ogarko, G. Visser, M. Lindsay, M. Jessell
- Date Published: September 2021
Abstract:
We introduce a sequential inversion workflow where we integrate magnetotelluric and magnetic data. We first perform probabilistic MT inversions, from which we derive 2D or 3D probabilities of observing an interface between rock units of contrasting e...
Microbial methane production in the Surat Basin, Queensland
- Publication Name: AEGC 2021
- Authors: B.C. Campbell, Se Gong, P. Greenfield, D.J. Midgley, I.T. Paulsen, S.C. George
- Date Published: September 2021
Abstract:
A large proportion of the methane found in coal seams is produced by microbial communities. Despite coal seam methane being a valuable resource for human energy security, the processes employed by these microbes in the production of methane are still...
Closing the gap between ground and airborne IP data modelling
- Publication Name: AEGC 2021
- Authors: A. Viezzoli, G. Fiandaca
- Date Published: September 2021
Abstract:
Modelling of Induced Polarization in AEM data (AIP) has recently been used more often in exploration. Which demands for more research to address the fundamental question “how does AIP compare to ground IP?”. Beside some of the well-known differen...
Laboratory study of temperature variation effects on Distributed Acoustic Sensing measurements
- Publication Name: AEGC 2021
- Authors: Sidenko E., Pevzner R., Tertyshnikov K. and Lebedev M.
- Date Published: September 2021
Abstract:
Fibre-Optic sensing is being actively used nowadays in various exploration and monitoring applications. Distributed Temperature Sensing (DTS) is used for measurements and monitoring of the temperature. Distributed Acoustic Sensing (DAS) is used to re...
Landscape and Pattern Similarity Analysis for gold exploration
- Publication Name: AEGC 2021
- Authors: González-Álvarez, Rondón-González, Ibrahimi, Lau et al.
- Date Published: September 2021
Abstract:
Covers geochemical landscape evolution and Pattern Similarity Analysis at tenement scale for gold exploration in Forrestania. The present study investigates the Forrestania area, located in the Yilgarn Craton, Western Australia, as a case study to co...
Reversible Jump Sequential Monte Carlo for Model Inference in Airborne Induced Polarisation
- Publication Name: AEGC 2021
- Authors: Laurence Davies, Christopher Drovandi, Matthew Sutton, Alan Yusen Ley-Cooper
- Date Published: September 2021
Abstract:
Exact methods of Bayesian model selection require exhaustive computation of normalising constants or sampling of the joint posterior of parameters and models via reversible jump Markov chain Monte Carlo (RJMCMC). Until recently, the latter has been f...
Acreage Release: Let’s Get Some Exploration Started in 2021
- Publication Name: PESA News
- Authors: Stephen Molyneux
- Date Published: September 2021
Abstract:
So, what does the 2021 gazettal have to offer then in Australia? Starting from the top of the country in the Vulcan to Gippsland in the deep SE, there is plenty for oil & gas companies alike to explore for....
Tech Talk – Gas Exporting Countries Forum (GECF): Post Covid-19 LNG market sails into new seas with carbon pricing at the forefront of the future
- Publication Name: PESA News
- Authors: Galia Fazeliyanova, Sandy Singh
- Date Published: September 2021
Abstract:
The global economy is cautiously walking away from the shadow of the unprecedented challenge of the COVID-19 pandemic. The GECF is observing a reset of the world energy outlook for the longer term and is finding it imperative to participate in the im...
Cyber Security: Cyberattack Tsunami
- Publication Name: PESA News
- Authors: Dale Granger
- Date Published: September 2021
Abstract:
A two-year investigation finds chinks in offshore rigs' armour.
Just how vulnerable the oil and gas industry could be to cyberattacks was demonstrated in May this year when a ransomware assault on the Colonial Pipeline in the United States success...
Seismic Snapshot (PESA News issue 162)
- Publication Name: PESA News
- Date Published: September 2021
Abstract:
Seismic Snapshot (Highlights):
- UWA scientists recognised in Premier’s Science Awards
- China and gas the key to reducing emissions
- Western Gas secures funding t...