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Integrated modelling of seismic velocities and impact on prospect evaluation
- Publication Name: AEGC 2021
- Authors: Jarrod Dunne, James Parsons
- Date Published: September 2021
Abstract:
It is often assumed that velocities associated with good quality seismic images can be directly used for time-to-depth conversion, pore-pressure prediction or even as a driver for seismic amplitude interpretation. However, such applications require s...
3D Modelling & Synthesis of Geophysical Data in Nash Creek, New Brunswick, Canada
- Publication Name: AEGC 2021
- Authors: Alexander Furlan, Hernan Ugalde, Alzbeta Ondercova, Bernd Milkereit
- Date Published: September 2021
Abstract:
‘Hotspot’ geophysical exploration has passed its zenith. In areas like New Brunswick, where this exploration style has been successful, deposits with a more complex signature have been left behind. Using improved computational power and geophysic...
Using the NCI Gadi Supercomputer to revolutionise processing of MT time series data: results from the GeoDeVL experiment
- Publication Name: AEGC 2021
- Authors: Nigel Rees, Sheng Wang, Ben Evans, et al.
- Date Published: September 2021
Abstract:
MagnetoTelluric (MT) time series datasets are expensive to acquire, can be high volume (100s of terabytes), and the time taken to publish (measured from collection to release) often takes more than two years. Time series datasets have been notoriousl...
AusArray: uncovering major crustal features using passive seismic data
- Publication Name: AEGC 2021
- Authors: Alexei Gorbatov, Andrew Medlin, Michael P. Doublier, Karol Czarnota, Tanya Fomin, Paul Henson, Brian L.N. Kennett
- Date Published: September 2021
Abstract:
It is generally accepted that improvements in mineral exploration are required to meet the rising demand for minerals associated with a transition to lower carbon energy sources. There is growing consensus in mineral exploration that the distribution...
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...
Application of LiDAR for hydrocarbon exploration in logistically and geologically challenging environments: examples from the Papuan Fold and Thrust Belt, Papua New Guinea
- Publication Name: AEGC 2021
- Authors: Luke Mahoney, Mitch Furnass, Pedro Restrepo-Pace
- Date Published: September 2021
Abstract:
The Papuan Fold and Thrust Belt (PFTB) in Papua New Guinea hosts the prolific Papuan Basin petroleum system yet remains underexplored compared with other fold and thrust belts worldwide. The underexplored nature of the PFTB results from its remotenes...
Geophysical proxies for redox gradients in IOCG systems: Cloncurry District, Qld, Australia
- Publication Name: AEGC 2021
- Authors: James Austin, Tobias Schlegel, John Walshe, Andreas Bjork, Clive Foss
- Date Published: September 2021
Abstract:
Iron oxide-copper-gold (IOCG) systems, in a broad geophysical sense, include a spectrum of mineralisationstyles ranging from reduced, pyrrhotite-dominant examples, sometimes referred to as iron sulphide coppergold (ISCG) systems, to magnetite-pyrite ...
Full waveform refraction imaging of the regolith with the CIG stack
- Publication Name: AEGC 2021
- Authors: Derecke Palmer
- Date Published: September 2021
Abstract:
Full waveform refraction imaging with the common intercept gather (CIG) is a simple application of the stacking procedures routinely employed with seismic reflection data processing to the standard intercept time method. Accordingly, the stacked full...
Post-rift magmatism on the continental shelf of the Otway Basin and implications for the igneous plumbing systems in sedimentary basins
- Publication Name: AEGC 2021
- Authors: Yakufu Niyazi, Mark Warne, Daniel Ierodiaconou
- Date Published: September 2021
Abstract:
Various types of igneous rocks have been frequently encountered during hydrocarbon exploration of sedimentary basins along rifted passive margins, and their impacts on hydrocarbon maturation and migration processes are diverse. Buried volcanoes gener...
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 ...
Gravimetric measurements of high pressure and temperature C1, C2 and C3 adsorption isotherms on Beetaloo Sub-basin shales
- Publication Name: AEGC 2021
- Authors: Nicholas Lupton, Michael Camilleri, Mohinudeen Faiz
- Date Published: September 2021
Abstract:
Exploration in Australia’s Beetaloo Sub-basin focuses on the liquids, wet-gas, and dry-gas mature shales of the Kyalla and Velkerri formations. Gas storage in these reservoirs occurs as free gas and additionally through adsorption to the internal p...
Geographic quantile regression forest: a new method for spatial modelling of mineral commodities
- Publication Name: AEGC 2021
- Authors: Kane Maxwell, Mojtaba Rajabi, Joan Esterle
- Date Published: September 2021
Abstract:
Spatial modelling of analysis results such as grade, geochemical properties and density is required for resource estimation in almost all commodities. For spatial modelling of most commodity properties, geostatistical methods are the most popular bec...
Application of Facies Based Seismic Inversion in Developing Shallow Gas Fields in Cooper-Eromanga Basin
- Publication Name: AEGC 2021
- Authors: Satyabrata Mishra, Shane Squire, Thomas Massey
- Date Published: September 2021
Abstract:
This paper presents a case-study of the application of facies-based seismic inversion in the Cooper-Eromanga Basin, South Australia. The technique has been used to support the development of shallow gas fields in the Cretaceous reservoirs of the Coor...
Towards standard technical Deeds for (airborne) geophysical surveys in Australia
- Publication Name: AEGC 2021
- Authors: Yvette Poudjom Djomani, James Goodwin
- Date Published: September 2021
Abstract:
Geoscience Australia (GA) and its predecessors have been conducting geophysical surveys and processing geophysical data since the early 1950’s. Over time, GA’s role has changed from being a pioneer in the acquisition and processing of data to foc...
Examples of integrating hyperspectral, geochemical and petrophysical drill core data using Australia’s National Virtual Core Library infrastructure
- Publication Name: AEGC 2021
- Authors: Carsten Laukamp, Jessica Stromberg, Neil Francis, et al.
- Date Published: September 2021
Abstract:
Drill core analytical tools are used for objectively measuring geoscience parameters that aid mineral exploration or groundwater research. Multiple types of geoscience parameters are frequently compared alongside each other, but underlying physicoche...
Vertically integrated geoscientific data at the Geological Survey of New South Wales
- Publication Name: AEGC 2021
- Authors: Ned Stolz
- Date Published: September 2021
Abstract:
The Geological Survey of New South Wales (GSNSW) has a vertically integrated workflow for delivering geophysical data and products. Raw geophysical data are acquired through regional scale, statewide and national surveys, laboratory measurements, and...
Seismic velocity analysis in the presence of AVO polarity reversals by fuzzy c-mean clustering
- Publication Name: AEGC 2021
- Authors: M. Javad Khoshnavaz, Duy Thong Kieu, Hamidreza Siahkoohi, Andrej Bόna
- Date Published: September 2021
Abstract:
Routine seismic imaging algorithms often require velocity models. Therefore, accuracy of velocity models obtained by velocity analysis plays a crucial role in seismic imaging. Seismic velocity analysis in CMP domain has been dominated by the use of a...
Calibrating BMR T2 Distribution logs to well test data
- Publication Name: AEGC 2021
- Authors: Keelan O’Neill, Mario Reyes, Benjamin Birt, Timothy Hopper
- Date Published: September 2021
Abstract:
Sustainable groundwater management plans are of critical importance to the future of increasingly scarce water resources. Borehole magnetic resonance (BMR) is a wireline logging technique used to provide in-situ formation evaluation. BMR can be utili...
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...
Hidden in Plain Sight: The Bamaga Basin
- Publication Name: AEGC 2021
- Authors: Wolfgang Fischer
- Date Published: September 2021
Abstract:
The Gulf of Carpentaria was extensively explored in the 1970s and 1980s targeting the Carpentaria (Jurassic-Cretaceous) and Karumba (Tertiary) sag basins, the sediments of which show little or no structuring. This activity failed to recognise the pre...
Environmental Site Assessment at a Mining Operation in Western Australia Using the Loupe TEM Profiling System
- Publication Name: AEGC 2021
- Authors: Remke L. van Dam, Greg Maude, Brendan Ray, Graham Jenke, Russell Mortimer
- Date Published: September 2021
Abstract:
The Loupe TEM is a transient electromagnetic profiling system for efficient mapping of near-surface ground conductivity. The system is operated by a two-person crew who carry the transmitter coil and 3-component receiver coils on backpacks. Benefits ...
Halloysite Nanotubes – The New Economy Mineral to Ensure Every Organisation Achieves Net Zero Carbon Emissions
- Publication Name: AEGC 2021
- Authors: Antonio Belperio
- Date Published: September 2021
Abstract:
Halloysite, a nanotubular version of the more common, platy clay mineral, kaolinite is globally-rare, but present in great abundance in several world-class kaolinhalloysite deposits recently defined on western Eyre Peninsula. Conventionally, halloysi...
Spatio-temporal distribution of igneous rocks and seismic facies analysis of buried volcanoes of the Prawn Platform, offshore Otway Basin
- Publication Name: AEGC 2021
- Authors: Yakufu Niyazi, Ovie Emmanuel Eruteya, Mark Warne, Daniel Ierodiaconou
- Date Published: September 2021
Abstract:
Volcanic rocks occur in different types of sedimentary basins, especially those evolving from lithospheric stretching. While volcanoes and other igneous rocks are widespread in the onshore Otway Basin, well-preserved volcanoes have not been documente...
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...
Radio Image Mapping at the Polymetallic Rosebery Mine, NW Tasmania
- Publication Name: AEGC 2021
- Authors: Asbjorn Norlund Christensen, Jon McLoughlin, Roland Hill
- Date Published: September 2021
Abstract:
In 2019, MMG conducted a suite of thirteen deep crosshole Radio Image Mapping (RIM) tomographic surveys along the northern extension of the polymetallic Rosebery Mine in North-Western Tasmania. The RIM method is based on the attenuation of an electro...
Recognising the impact of uncertainty in resource models
- Publication Name: AEGC 2021
- Authors: Steve Sullivan
- Date Published: September 2021
Abstract:
The research aimed to test the variability of geological modelling due to the interpretation bias of the person building the model. Measuring this innate uncertainty in modelling allows stakeholders to have confidence in the models, knowing the level...
Australian Proterozoic Thermal Aureole Gold Mineral Systems: the Critical Role of High Crustal Geothermal Gradients and the Insights of Vic Wall
- Publication Name: AEGC 2021
- Authors: Lesley Wyborn
- Date Published: September 2021
Abstract:
Thirty years ago, Wall (1990) proposed the name ‘Thermal Aureole Gold (TAG)’ for a distinctive class of plutonrelated gold deposits (now more commonly known as Intrusion-related Gold (IRG)). Initially based on the Pine Creek, Tanami and Paterson ...
The Delamerian Orogen- An overview of the resistivity structure across scales
- Publication Name: AEGC 2021
- Authors: Kate Robertson, Tom Wise, Stacey Curtis, Alison Kirkby, Stephan Thiel, Jingming Duan, Graham Heinson
- Date Published: September 2021
Abstract:
Here we present 3D and 2D resistivity models of the lithosphere beneath an area of southeast Australia, derived from the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) and a subsequent infill broadband MT transect collected in...
UAV Magnetic Survey Planning, QAQC and Data Processing
- Publication Name: AEGC 2021
- Authors: Brett Adams, James Jensen, Brendan Ray
- Date Published: September 2021
Abstract:
UAVs have been deployed increasingly to collect magnetic data, however acquisition using these systems often lack QAQC checks that are typically expected from fixed-wing or helicopter-based acquisition. Furthermore, survey parameters such as line spa...
Results from the largest Airborne Electromagnetic (AEM) survey ever flown in NSW
- Publication Name: AEGC 2021
- Authors: Astrid Carlton, Liann Deyssing, et al.
- Date Published: September 2021
Abstract:
The Geological Survey of New South Wales (GSNSW) has mapped potential mineral and groundwater features, and the depth of intense weathering by interpreting a large airborne electromagnetic (AEM) dataset in Central NSW....