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Exploring links between thermal maturity and electrical properties of organic-rich shales
- Publication Name: AEGC 2021
- Authors: Claudio Delle Piane, Matthew Josh, Julien Bourdet, David N. Dewhurst, M. Ben Clennell
- Date Published: September 2021
Abstract:
Electrical resistivity is widely used as an effective proxy for detection of organic matter and hydrocarbons in shales. Recently, with more organic-rich shales being studied, it has been noted that resistivity follows a non linear evolution with ther...
Airborne geophysical surveys uploaded to SARIG in 2020: Industry focus
- Publication Name: AEGC 2021
- Authors: Philip Heath
- Date Published: September 2021
Abstract:
The Covid-19 pandemic has given the geophysicists at the Geological Survey of South Australia the opportunity to revisit historical geophysical data that had not yet been uploaded onto the South Australian geoserver web portal: SARIG (South Australia...
The genesis and evolution of laminar carbonates in lacustrine basin: implications for shale oil accumulation
- Publication Name: AEGC 2021
- Authors: Chenyang Bai, Shujun Han, Zhenhuan Shen
- Date Published: September 2021
Abstract:
Shale oil has become a popular topic for global unconventional oil and gas research in the petroleum industry. Recent exploration efforts have indicated that laminar carbonates are closely related to the favorable depositional strata of lacustrine sh...
Case Study from N.W. Carnarvon using WEB-AVO Inversion to Map Low Saturation Gas & Unravel Geology Using “Noisy” Seismic
- Publication Name: AEGC 2021
- Authors: John Coffin, Angie Kelsay, Shahid Ur Rehman
- Date Published: September 2021
Abstract:
This case study applies the next generation of seismic AVO inversion technology to a project in the NW Carnarvon Basin offshore Western Australia. The technology is called WEB-AVO (Wave Equation Based – AVO Inversion) and no longer considers the ea...
Interpretation of magnetotelluric and airborne electromagnetic inversions from the Proterozoic basins of the Capricorn Orogen, WA
- Publication Name: AEGC 2021
- Authors: Sasha Banaszczyk, Mike Dentith, Perla Piña-Varas, David Annetts
- Date Published: September 2021
Abstract:
Recently, a regional-scale TEMPEST AEM survey and a local-scale MT survey were acquired over the Yerrida Basin in the Capricorn Orogen, WA. These two electromagnetic datasets provide an opportunity to compare the electromagnetic responses from both t...
Compositional control on frictional properties of Goldwyer shale reservoir rocks
- Publication Name: AEGC 2021
- Authors: Partha Pratim Mandal, Reza Rezaee, Mustafa Sari, Joel Sarout
- Date Published: September 2021
Abstract:
Production from ultra-low permeable gas shale reservoirs is feasible only through hydraulic fracturing stimulation. Slip along a pre-existing natural network of fractures/faults with the injection of hydraulic fluid is mostly controlled by the fricti...
Robust 3D models of geochemical and petrophysical properties from combining borehole and seismic reflection data: A case study from the Tropicana Gold Mine
- Publication Name: AEGC 2021
- Authors: Duy Thong Kieu, Anton Kepic, Jai Kinkela, Ockert Terblanche, Stephen Brown
- Date Published: September 2021
Abstract:
The creation of 3D models of ore zones and geotechnical properties is typically performed by the interpolation of borehole data. Kriging and other interpolation methods have serious sampling issues, including bias from borehole orientation. Interpola...
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...
Groundwater and gas sampling informing hydrogeological conceptualisation of the Precipice and Hutton Sandstone aquifers of the southern Surat Basin
- Publication Name: AEGC 2021
- Authors: J. K. Pearce, H. Hofmann, K. Baublys, et al.
- Date Published: September 2021
Abstract:
The southern Surat Basin in Queensland, Australia, may be a prospective region for geological storage of CO2 within the Precipice Sandstone with the Evergreen Formation acting as a sealing cap-rock of the reservoir. The Hutton Sandstone, a major regi...
A brief history of 3D seismic acquisition in BHP Coal and some predictions for the future
- Publication Name: AEGC 2021
- Authors: Tim Dean, Matt Grant, Margarita Pavlova
- Date Published: September 2021
Abstract:
BHP Coal acquired their first 3D seismic survey in 1998 at the Goonyella mine site. The survey covered an area of 1.6 km² and utilised a 360 channel cabled recording system and an explosive source to record 15 fold data. Since then BHP has acquired ...
An integrated hydrogeophysical and hydrogeological approach to underpin the long-term water security of a remote tropical island
- Publication Name: AEGC 2021
- Authors: Andrew R Taylor, Tim Munday, Chris Turnadge, Joanne Vanderzalm, et al.
- Date Published: September 2021
Abstract:
Groundwater resources that sustain small Indigenous communities in remote parts of northern Australia are often poorly characterised, in part due to their remoteness and the economics of undertaking field investigations. The Warruwi community on Sout...
Geochemical signatures and critical metal contents of key deposit types in the Mount Isa Province, Queensland, Australia
- Publication Name: AEGC 2021
- Authors: Vladimir Lisitsin, Courteney Dhnaram, Matthew Valetich
- Date Published: September 2021
Abstract:
Geological Survey of Queensland undertook a program of geochemical and mineralogical characterisation of key deposit types in the Mount Isa Province in Queensland, Australia. The main objectives of the study included: (1) identification of complete m...
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 ...
The Role of Passive Seismic Imaging in Near-Mine Exploration
- Publication Name: AEGC 2021
- Authors: Gerrit Olivier, Andrew Foley, Nicola Ramm, et al.
- Date Published: September 2021
Abstract:
The future of the mineral mining industry relies on the ongoing success of exploration projects. In this paper, the use of near-mine passive seismic imaging is discussed as a solution to exploration demands. We explore the issues currently being face...
3D Bedrock Model Utilising Multi-channel Analysis of Surface Waves to Assist the Land Development Industry in Greater Melbourne, VIC
- Publication Name: AEGC 2021
- Authors: Tavis Lavell
- Date Published: September 2021
Abstract:
A common problem across greater Melbourne’s expanding land development, both residential and commercial, is encountering sites that have incredibly stiff and undulating bedrock. This is experienced on sites with Newer Volcanic Basalt which accounts...
Stratigraphic drilling in the era of EFTF: The Barnicarndy 1 and NDI Carrara 1 wells
- Publication Name: AEGC 2021
- Authors: Adam H.E. Bailey, Emmanuelle Grosjean, Liuqi Wang, et al.
- Date Published: September 2021
Abstract:
Exploring for the Future (EFTF) is an Australian Government initiative that gathers new data and information about potential mineral, energy and groundwater resources. Commencing in 2016 with a focus on northern Australia, an EFTF extension to 2024 w...
3-D Gravity Geometry Inversion of the Matheson Area, Abitibi greenstone belt: maintaining the contacts of one of the geological unit fixed for obtaining superior results
- Publication Name: AEGC 2021
- Authors: Fabiano Della Justina
- Date Published: September 2021
Abstract:
Using measured density values and surface geology as constraints, and a compilation of two data sets of ground gravity as observed data, 3-D inversions using the VPmg algorithm were used to estimate the subsurface model in the Matheson area, which is...
Onshore seismic acquisition: out with the old, in with the new
- Publication Name: AEGC 2021
- Authors: Denis Sweeney, Tim Dean, Claudio Strobbia, John Hughes, Martin Bayly
- Date Published: September 2021
Abstract:
The move from cable-based telemetry seismic acquisition systems with strings of wire-connected geophones to independent nodal, single sensor recording has been dramatic and is reflected by the plethora of nodal systems on offer and their increased us...
A method for the downward continuation of gravity data using Padé approximation
- Publication Name: AEGC 2021
- Authors: Chong Zhang, Qingtian Lü, Yayong Yan
- Date Published: September 2021
Abstract:
Downward continuation of exploration gravity or magnetic data is a basic part of many data processing and interpretation techniques. Methods based on Taylor approximations are quick, easy, and visual ways to obtain good results. But for prediction, T...
Optimising 3D coal seismic imaging with pre-stack depth migration
- Publication Name: AEGC 2021
- Authors: Xiaodong Lu, Alan Meulenbroek, Karel Driml
- Date Published: September 2021
Abstract:
Pre-stack depth migration (PSDM) is applied to a 3D seismic survey from the Bowen Basin in QLD to improve imaging of shallow coal-seams which suffer from poor signal-to-noise caused by poor statics and velocities. Two different velocity fields are us...
Seismic inversion by hybrid machine learning
- Publication Name: AEGC 2021
- Authors: Yuqing Chen, Erdinc Saygin
- Date Published: September 2021
Abstract:
Full waveform inversion (FWI) has been widely used for recovering a high-resolution subsurface structure from the entire content of measured seismic data. However, FWI requires a good starting model which needs to be close to the true model. If it is...
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...
Detailed geophysical mapping and 3D geological modelling to support urban planning: A case study of Ny Rosborg, Denmark
- Publication Name: AEGC 2021
- Authors: Theis R. Andersen, Søren E. Poulsen, Anna B. Medhus
- Date Published: September 2021
Abstract:
At present, urbanisation is taking place. As cities expand, areas previously omitted due to construction risks are now being urbanised. These areas are typically characterised as those with unforeseen soil properties, unknown groundwater conditions a...
Automated fracture detection and characterization from unwrapped drill-core images using Mask R-CNN
- Publication Name: AEGC 2021
- Authors: Fatimah Alzubaidi, Patrick Makuluni, Stuart R. Clark, et al.
- Date Published: September 2021
Abstract:
Drill cores provide the most reliable fracture information in subsurface formations as they present a clear and direct view of fractures. Core observation and image log interpretation are usually integrated for fracture analysis of underground layers...
Inverting the head wave coefficient with the Werth equation
- Publication Name: AEGC 2021
- Authors: Derecke Palmer
- Date Published: September 2021
Abstract:
The head wave coefficient, the refraction analogue of the reflection coefficient, is a complex function of the densities and the P- and S-wave velocities in both the weathered and sub-weathered regions. In general, the head wave coefficient increases...
Complex recharge mechanisms creating contradictory tracer signals in a large karst aquifer in northern Australia elucidated by a multi-tracer study
- Publication Name: AEGC 2021
- Authors: Axel Suckow, Alec Deslandes, Christoph Gerber, Cornelia Wilske, Sebastien Lamontagne, Yang Guo-Min, Jiang Wei
- Date Published: September 2021
Abstract:
The up to 300m thick Cambrian Limestone Aquifer in northern Australia extends over different climatic zones from the dry savanna to the tropics and is karstified. This hydrologically challenging system was studied using multiple environmental tracer ...
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...
Multi-purpose utility of constructing 3D static Geomechanical model in the Ichthys field, Browse Basin
- Publication Name: AEGC 2021
- Authors: Partha Pratim Mandal, Iman Essa, Sankhajit Saha, Reza Rezaee
- Date Published: September 2021
Abstract:
The petroleum industry progressed significantly to develop 3D/4D geomechanical models (GMs) to make efficient field development planning which reduces the uncertainty of 1D GM in the field scale. In this paper, we demonstrated how to build a high-res...
The role of geophysics in the discovery of the Gonneville PGE-NiCu-Co-Au Deposit, Julimar, Western Australia
- Publication Name: AEGC 2021
- Authors: Jacob Paggi, Kevin Frost, Bruce Kendall
- Date Published: September 2021
Abstract:
The Gonneville deposit is a significant new PGE-nickelcopper-cobalt-gold sulphide deposit discovered by Chalice Mining in 2020. Located only 70 km northeast of Perth, Western Australia, it represents the first major discovery of a PGE-rich orthomagma...
The present-day state of tectonic stress in eastern Australia
- Publication Name: AEGC 2021
- Authors: Mojtaba Rajabi
- Date Published: September 2021
Abstract:
Knowledge of the present-day stress is important to understand the dynamics of earthquakes, and to manage the safe and sustainable usage of the underground during storage and exploitation. Eastern Australia hosts several sedimentary basins with large...