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PERMEABILITY MODELLING USING DIGITAL ROCK IMAGES FROM MICRON SCALE
- Publication Name: AEGC 2021
- Authors: Lionel Esteban, Mojtaba Seyyedi, White Cameron, Giwelli Ausama, Valeriya Shulakova, Marina Pervukhina, Sam Jackson, Joel Sarout, Amir Aryana, Yoshitake Kato, Mai Shimokawara, Ryuta Kitamura, Fei Jiang, Takeshi Tsuji, Tatsunori Ikeda, Maxim Lebedev
- Date Published: September 2021
Abstract:
Recent technology improvements allow gaining a digital 3D replica of natural rock using fast and non-destructive tomographic techniques. Combining core-scale images from medical X-Ray with micron resolution images from micro CT scanners, natural rock...
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...
Rock Property and Depth Mapping from magnetic data applied to greenfields exploration targeting in the Cloncurry District
- Publication Name: AEGC 2021
- Authors: David Pratt, James Austin, Clive Foss
- Date Published: September 2021
Abstract:
A new method for building a model of the rock property distribution on an unconformity surface (Pratt et al., 2019) presents new opportunities for greenfield exploration in complex geological environments. The method uses the inherent 3D information ...
An automated system for preventing hydraulic vibrator tip-over during land seismic surveys
- Publication Name: AEGC 2021
- Authors: Richard Barnwell, Tim Dean, Hagay Haviv, et al.
- Date Published: September 2021
Abstract:
Hydraulic vibrators are the preferred source for land seismic surveys. The energy from the vibrator’s signal (commonly referred to as a sweep) is transmitted into the ground via a baseplate that is coupled to the surface by loading it with the weig...
A new method for determining drill-bit signal emission time
- Publication Name: AEGC 2021
- Authors: Zixing Qin, Milovan Urosevic, Andrej Bona, Roman Pevzner, Konstantin Tertyshnikov
- Date Published: September 2021
Abstract:
In 2019, the first ever Seismic While Drilling (SWD) dataset recorded by Distributed Acoustic Sensing (DAS) fibre optic cable was acquired at the Otway Carbon Capture and Storage (CCS) site. After analysing the recorded signal, a new technique named ...
Inversion of Airborne IP data with a multi-mesh approach for parameter definition
- Publication Name: AEGC 2021
- Authors: Gianluca Fiandaca, Andrea Viezzol
- Date Published: September 2021
Abstract:
The interest on Induced Polarization in AEM data (AIP) has significantly increased in recent years, both within the research community and in the industry. However, the inversion of AIP data is particularly ill-posed, especially when spectral modelli...
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...
Transformative geophysics: Alternatives to the reduction-to-pole transformation of magnetic data
- Publication Name: AEGC 2021
- Authors: Richard Smith
- Date Published: September 2021
Abstract:
Magnetic data is difficult to interpret due to the bipolar nature of the field and the fact that the amplitude and phase of the response varies depending on the inclination of the Earth’s field and the dip of magnetic bodies. The reduction to the p...
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...