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Case Studies using Loupe – Mapping Geology in Near-Surface
- Publication Name: AEGC 2021
- Authors: Gregory Street, Andrew Duncan
- Date Published: September 2021
Abstract:
Surveys were conducted over five prospects in the southwest of Western Australia with aims of mapping, geology, sulphides, graphite and clay. The high resolution of the Loupe system lends itself to a role similar to ground magnetic data in mapping ge...
Overburden measurement for coal mine management with 3D high resolution compressional and shear velocity seismic inversion
- Publication Name: AEGC 2021
- Authors: Claudio Strobbia, Martin Bayly, Denis Sweeney, et al.
- Date Published: September 2021
Abstract:
High resolution surface seismic surveys can provide useful images of coal bed reflections to depths as shallow as 50 to 100 metres. There is also a need, to gain information of the overburden properties above these depths. This information gap can be...
Attenuation of ice-sheet reverberations in teleseismic P-wave receiver functions
- Publication Name: AEGC 2021
- Authors: Dale Harpley, Steve Hearn, Shaun Strong
- Date Published: September 2021
Abstract:
Teleseismic P-wave receiver functions (PRFs) in icecovered regions are contaminated by reverberations within the ice-sheet. The crustal conversion events which are commonly used for identifying lithospheric structure are concealed by these ice reverb...
Lithospheric-scale magnetotellurics over the Eastern Goldfields Superterrane, Yilgarn Craton
- Publication Name: AEGC 2021
- Authors: Kate Selway, Mike Dentith, Klaus Gessner
- Date Published: September 2021
Abstract:
Long-period magnetotelluric (MT) data were collected in the Yilgarn Craton, Western Australia, in a ~200 x 250 km grid that crosses parts of the heavily mineralised Eastern Goldfields Superterrane and parts of the adjacent, less mineralised Youanmi T...
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...
New mineral system vectors for revitalised copper-gold discovery in the Gawler Craton
- Publication Name: AEGC 2021
- Authors: John Anderson
- Date Published: September 2021
Abstract:
Combination of a new strato-tectonic model for the Olympic Metallogenic Event (OME) and a zircon-based geochemical tool offers a significant step-change for ore target vectoring for a spectrum of IOCG and coeval copper-gold deposit styles in the Gawl...
Seismic network modelling and design in an interactive web-based environment
- Publication Name: AEGC 2021
- Authors: Pavel Golodoniuc, Januka Attanayake, Abraham Jones, Samuel Bradley
- Date Published: September 2021
Abstract:
To detect and locate earthquakes effectively and accurately, seismologists must design and install a network of seismometers that can capture small seismic signals originating in the sub-surface. A major challenge when deploying an array of seismomet...
Why we should not report unconstrained inversion output in densities or magnetic susceptibilities
- Publication Name: AEGC 2021
- Authors: Clive Foss, James Austin
- Date Published: September 2021
Abstract:
Unconstrained gravity and magnetic inversions are too readily accepted as justified representations of the ground structure. Reliable estimates from unconstrained inversions are mostly restricted to discrete anomalies which can be reasonably separate...
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...
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...
Petroleum systems model for source-rock-reservoir evaluation in the Beetaloo Sub-basin
- Publication Name: AEGC 2021
- Authors: Mohinudeen Faiz, Vincent Crombez, Claudio Delle Piane
- Date Published: September 2021
Abstract:
The Beetaloo Sub-basin comprises one of the oldest petroleum systems in the world with the Middle Velkerri and Lower Kyalla shales considered as key unconventional source-rock-reservoir targets. The basin is relatively under-explored with only few we...
Data geo-Science Approach for Modelling Unconventional Petroleum Ecosystems and their Visual Analytics
- Publication Name: AEGC 2021
- Authors: Shastri L Nimmagadda, Andrew Ochan, Christine Namugenyi, Torsten Reiners
- Date Published: September 2021
Abstract:
Storage, integration and interoperability are critical challenges in the unconventional exploration data management. With a quest to explore unconventional hydrocarbons, in particular, shale gas from fractured-shales, we aim at investigating new petr...
Optimising slip-sweep for high-productivity Vibroseis coal surveys
- Publication Name: AEGC 2021
- Authors: Shaun Strong, Dale Harpley, Steve Hearn
- Date Published: September 2021
Abstract:
The increased scale of 3D seismic surveys in the Australian Coal industry has necessitated the use of high-production slip-sweep surveys. A method is provided which provides a quantitative visualisation of harmonic noise expected for different slip p...
Simultaneous inversion of teleseismic P- and converted S-waves to constrain the seismic structure of the crust
- Publication Name: AEGC 2021
- Authors: Mehdi Tork Qashqai, Erdinc Saygin
- Date Published: September 2021
Abstract:
Traveltimes of P and mode-converted S-waves and their reverberations place a tight constraint on the Vp/Vs ratio and their amplitude ratio provides tight bounds on the P and S wave velocity jumps across the main discontinuities in the subsurface stru...
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...
Inferring geological features masked by artefacts in core photography using neural networks
- Publication Name: AEGC 2021
- Authors: Yasin Dagasan, Harvey Nguyen, Mark Grujic
- Date Published: September 2021
Abstract:
The application of computer-vision technologies to geological datasets has previously been shown to objectively verify existing datasets (e.g., automated calculation of geotechnical parameters) as well as the creation of new datasets (e.g., fracture ...
A time-lapse feasibility workflow incorporating core calibrated 4D rock physics models
- Publication Name: AEGC 2021
- Authors: Christian Proud, Ask Frode Jakobsen, Rob Ross, Jason McKenna
- Date Published: September 2021
Abstract:
Rock physics analysis is a useful tool in time-lapse seismic feasibility studies and can help to assess the effect of pressure and saturation changes on the elastic parameters which the seismic data is sampling. Calibration using velocity measurement...
Noble gases: a versatile exploration tool for water, minerals and hydrocarbons
- Publication Name: AEGC 2021
- Authors: Axel Suckow, Cornelia Wilske, Christoph Gerber, Alec Deslandes, Punjehl Crane, Dirk Mallants
- Date Published: September 2021
Abstract:
Noble gases exist mainly as stable and some radioactive isotopes and are amongst the most versatile geoscientific exploration tools. Popular applications across nearly all areas involving fluid movement in the geosphere include: groundwater and its r...
The uplift history of the Kidson Sub-Basin
- Publication Name: AECG 2021
- Authors: George Marfo, Stuart R. Clark, Tehani Palu
- Date Published: September 2021
Abstract:
The Canning Basin, onshore Western Australia, is highly prospective for conventional and unconventional hydrocarbons, as well as Uranium and sediment-hosted base metal deposits. The basin has evolved since the Early Ordovician undergoing both extensi...
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...
Constraining gravity inversion with lower-dimensional seismic information: Imaging the eastern Yilgarn Craton
- Publication Name: AEGC 2021
- Authors: Mahtab Rashidifard, Jérémie Giraud, Mark Lindsay, Mark Jessell, Vitaliy Ogarko
- Date Published: September 2021
Abstract:
Integrating complementary geophysical datasets has proven to be a powerful tool for constraining the subsurface properties and also generating a model compatible with available datasets. As different geophysical surveys are designed with specific tar...
A Beautiful Sunset (Clause): Enhancing Statewide Geophysics with High Resolution Company Data
- Publication Name: AEGC 2021
- Authors: Sam Matthews
- Date Published: September 2021
Abstract:
The Geological Survey of NSW (GSNSW) is the custodian of both government and company geophysical data for NSW. In 2020 GSNSW committed to delivering an updated statewide magnetic merge combining government and open file company geophysical data, at a...
Estimation of Magnetization Direction over Wide Sheets Illustrated with a Case Study of the Earoo Magnetic Anomaly, Western Australia
- Publication Name: AEGC 2021
- Authors: Clive Foss, Phil Schmidt, James Austin
- Date Published: September 2021
Abstract:
Single profile analysis across locally planar structures such as the edges of a wide sheet cannot resolve the 3D magnetization vector but we show that from two or more profiles across differently trending edges the magnetization is uniquely defined a...
Helicopter Airborne Electromagnetics at 12.5 Hz – Western Australia Case studies
- Publication Name: AEGC 2021
- Authors: Adam Smiarowski
- Date Published: September 2021
Abstract:
Low base frequency EM provides an advantage to detection of very conductive targets or for exploration with thick conductive cover. A comparison of a 30 Hz and 7.5 Hz system showed significantly better detection to a conductive body at 400 m depth. 1...
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...
In situ zircon Hf-O isotopic constraints on the genesis of quartz diorite in Narusongduo Pb-Zn mining area, Tibet
- Publication Name: AEGC 2021
- Authors: Xuejing Gong, Qingtian Lü, Zhusen Yang
- Date Published: September 2021
Abstract:
Narusongduo Pb-Zn deposit is located in the southern margin of the middle Lhasa terrane. The characteristics of the magma source and genetic mechanism of the premetallogenic quartz diorite in the mining zone have not been well explained. The zircon o...
Big Data guided Digital Petroleum Ecosystems for Visual Analytics and Knowledge Management
- Publication Name: AEGC 2021
- Authors: Shastri L Nimmagadda, Andrew Ochan, Neel Mani, Torsten Reiners
- Date Published: September 2021
Abstract:
The North West Shelf (NWS) interpreted as a Total Petroleum System (TPS), is Super Westralian Basin with active onshore and offshore basins through which shelf, slope and deep-oceanic geological events are construed. In addition to their data associa...
Node quality control using drones and object detection
- Publication Name: AEGC 2021
- Authors: Jason Stephenson, Shaun Strong
- Date Published: September 2021
Abstract:
Wireless nodal surveys are now commonplace in Australian land seismic. It is essential that rigorous QC of the condition of the nodes is performed during these surveys. Acquiring footage using off-the-shelf drones can assist with this....
Modelling fluid flow in complex 3D fault networks
- Publication Name: AEGC 2021
- Authors: Thomas Poulet, Ulrich Kelka, Vincent Crombez, Marcus Kunzmann, Teagan Blaikie, Heather Sheldon, Martin Lesueur
- Date Published: September 2021
Abstract:
Faults play a critical role in controlling the movement of mineralising fluids and the resulting formation of mineral deposits. Numerical models are useful for understanding fluid pathways through faults and their host rocks. However, the heterogeneo...
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...