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Integrating seismic inversion in static models to capture geological heterogeneity and improve exploration outcomes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Cristina Angheluta*, Megan Slade, Bonnie Henderson, David Kulikowski
- Date Published: September 2019
Abstract:
As an industry we have a poor track record of estimating prospect volume distributions and we tend to overpredict the pre-drill volumes, with most discoveries resulting in the pre-drill P90 volumes or less (Figure 1). To achieve improved prediction t...
Metal Earth: Role of multidisciplinary geophysical methods to improve knowledge of mineral deposition across Precambrian rocks
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Esmaeil Eshaghi, Richard Smith, Mostafa Naghizadeh, Graham James Hill, Eric Roots, Amir Maleki Ghahfarokhi, Saeid Cheraghi, John Ayer
- Date Published: September 2019
Abstract:
In this paper, we discuss acquiring, processing and preliminary modelling of multidisciplinary geophysical data (i.e. seismic, magnetotelluric, potential field data and petrophysical characterisations) to reliably model subsurface features along the ...
Integrating a Minerals Systems Approach with Machine Learning: A Case Study of ‘Modern Minerals Exploration’ in the Mt Woods Inlier – northern Gawler Craton, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mark Rieuwers, Antoine Caté
- Date Published: September 2019
Abstract:
There has been extensive exploration in the Mt Woods inlier in the northern Gawler Craton, South Australia since the 1960s, particularly for iron oxide-copper-gold (IOCG) mineralisation since the 1975 super giant Olympic Dam IOCG-U discovery by Weste...
Rock physics for multiscale, multiphysics data assimilation from molecular to laboratory scale
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Klaus Regenauer-Lieb*, Thomas Blach, Ankita Singh, Amalia Halim, Stuart Clark, Christoph Schrank
- Date Published: September 2019
Abstract:
Exploration geophysics and reservoir production strategies rely on a robust knowledge of reservoir petrophysical properties and their uncertainties. We have developed a new approach that not only quantifies uncertainties of petrophysical properties i...
Supporting data-driven exploration in NSW
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Keith Gates
- Date Published: September 2019
Abstract:
NSW legislative changes in 2016 mean that from 1 June 2021, confidential mineral exploration company reports will become open file 5 years after submission. This will result in a large amount of previously confidential data being released on 1 June 2...
Litho-structural controls on mineralisation at the Pillara carbonate-hosted Zn-Pb Deposit, Lennard Shelf District, Western
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Dennis Arne*, Simon Dörling, Robert Fagan, Heather Middleton
- Date Published: September 2019
Abstract:
The Pillara Zn-Pb deposit is located on the northeast margin of the Canning Basin, Western Australia where it is hosted by a series north-northeast-trending, en echelon, conjugate normal faults that bound a central graben plunging gently to the north...
Orogenic gold prospectivity mapping using machine learning
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mike McMillan*, Jen Fohring, Eldad Haber, Justin Granek
- Date Published: September 2019
Abstract:
As major mineral discoveries have become rarer over the last two decades, the industry has begun to turn to new technologies to assist in the exploration process. One such advancement is the application of machine learning and artificial intelligence...
What you need to know to drill a high pressure, high temperature well
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jonathan Slade*
- Date Published: September 2019
Abstract:
The challenges in drilling a high pressure and high temperature (HPHT) well are unique to every opportunity. The key to successfully drilling an HPHT well is to utilise the appropriate people, technology and design at the appropriate time. To do this...
Drones as a support tool for seismic acquisition
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Shaun Strong. Jason Stephenson
- Date Published: September 2019
Abstract:
The availability of relatively inexpensive UAVs in the form of drones provides many opportunities for seismic exploration.
While government regulations still provide many restrictions in this space, this trial has demonstrated that significa...
Building a 3D Geomechanical Model for the Fitzroy Trough
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Oliver Gaede, Moritz Ziegler, Oliver Heidbach
- Date Published: September 2019
Abstract:
We present initial results from a physically self-consistent 3D geomechanical model for the Fitzroy Trough in the Canning Basin, Western Australia. Our research aims to improve the understanding of in-situ stresses in the trough, in particular the ov...
Are stromatolites in the northern Perth Basin following the End Permian mass extinction?
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Liam J. Olden*, Jane Cunneen, Milo Barham, Hugo K.H. Olierook, Gregory Smith, Erica Suosaari
- Date Published: September 2019
Abstract:
Following the End Permian Mass Extinction (EPME) event, global stromatolite distributions rapidly increased. There are three documented examples of stromatolites occurring in intracontinental settings following the EPME; Greenland, Madagascar and wes...
Geophysics used to help find good quality groundwater in the Vientiane Plain, Lao PDR
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Michael Hatch*, Okke Batelaan, Eddie Banks, Somphasith Douangsavanh
- Date Published: September 2019
Abstract:
Lao PDR is a poorly developed country, with a large rural population which relies heavily on agricultural production. The Vientiane Plain is one of the most important and largest agricultural production areas with plans to expand the area under irrig...
The Science of Discovery – from Exploration 1.0 to Discovery 2.0
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Timothy Craske*
- Date Published: September 2019
Abstract:
The tools of modern exploration developed in the post-war and cold war periods are no longer delivering mineral discoveries at the required rate for future economic production. The near surface search space is becoming mature. A new exploration toolk...
Geochemical dispersion processes in deep cover and neotectonics in Coompana, Nullarbor Plain, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ignacio González-Álvarez*, Carmen Krapf, Ryan Noble, David Fox, Nathan Reid, Clive Foss, Tania Ibrahimi, Rian Dutch, Liz Jagodzinski, David Cole, Ian Lau, Tenten Pinchand
- Date Published: September 2019
Abstract:
Mineral exploration in regions under thick cover is challenging. This study looked into vertical geochemical dispersion processes through ~550 m of cover in the Coompana Province, South Australia. We collected new data from CDP008 drill hole (~680 m)...
Subsurface seismic imaging using drill bit noise
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mehdi Asgharzadeh*, Ashley Grant, Andrej Bona, Milovan Urosevic
- Date Published: September 2019
Abstract:
Acoustic signal generated by drill bit cutting action in the borehole can be recorded passively by geophones on the surface and used to produce an image of the subsurface under the geophone array. A single pilot trace is commonly recorded on the dril...
VMS and Ni-Cu exploration using an integrated geophysical and drilling method
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Flemming Effersø*, Errol Smart, Russell Mortimer
- Date Published: September 2019
Abstract:
This case study illustrates the use of an exploration method that leverages modern exploration techniques for deep-seated VMS and Ni-Cu deposits in a 978 km2 survey area in the highly prospective Areachap Belt, South Africa....
Internal architectural analysis of mass transport deposits to unravel deepwater dispersal fairways; a novel approach to an old challenge
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Roland Dashti*, Benjamin Birt, Masoud Jangani
- Date Published: September 2019
Abstract:
High resolution borehole images were used to study the internal architecture of mass transport deposits (MTD units) in a well drilled in offshore deepwater Borneo. The main objective was to utilize information from bedding orientations within MTDs to...
Moho structure of Australia from probabilistic inversion of teleseismic P-wave coda autocorrelation
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mehdi Tork Qashqai*, Erdinc Saygin
- Date Published: September 2019
Abstract:
The autocorrelation of the seismic transmission response of a layered medium (autocorrelogram), in the presence of a free surface, corresponds to the reflection response. Despite many studies on the imaging of local structures through retrieval and f...
4D Seismic Bandwidth and Resolution Analysis for Reservoir Fluid-flow Model Applications
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Rafael Souza, David Lumley, Jeffrey Shragge, Alessandra Davolio, Denis Schiozer
- Date Published: September 2019
Abstract:
Limitations on the vertical resolution in seismic data and fluid-flow models challenges the accurate interpretation of time-lapse (4D) seismic signals to identify fluid saturation changes within hydrocarbon reservoirs. Conventional streamer seismic d...
Deep neural networks for 1D impedance inversion
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Vladimir Puzyrev*, Anton Egorov, Anastasia Pirogova, Chris Elders, Claus Otto
- Date Published: September 2019
Abstract:
We investigate the applicability of different types of deep neural networks for the estimation of subsurface properties from seismic data. The pre-trained networks can predict velocity models from new data in a few milliseconds, which makes this data...
DAS seismic monitoring of the shallow CO2 controlled-release experiment at the South West Hub In-Situ Laboratory
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: K. Tertyshnikov*, R. Pevzner, B. Freifeld, L. Ricard, A. Avijegon
- Date Published: September 2019
Abstract:
Carbon Capture and Storage (CCS) remains one of the most viable short-term options for halting the increase in atmospheric concentration of greenhouse gases. Assurance of storage safety is an essential part of the process required to maintain a commu...
Century Zn deposit–the world’s largest meteorite impacted orebody
- Publication Name: Australasian Exploration Geoscience Conference
- Authors: Finbarr Murphy*, Terry Lees, Andrew Tomkins, Damian O’Donohue
- Date Published: September 2019
Abstract:
We describe how the world-class Proterozoic Century zinc deposit in northwest Queensland has been sculptured by an Ordovician meteorite impact, the Lawn Hill Impact Structure. The deposit is located at the SW edge of the crater, is dismembered by cra...
Artificial intelligence techniques to the interpretation of geophysical measurements
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Desmond FitzGerald*
- Date Published: September 2019
Abstract:
Integration of geology and geophysics thinking requires a common earth model, that accommodates, with errors, all the features from the geophysics interpretation products, topological rules from geology, field mapping and drill logs, and the link bet...
Colour amplifies relief shading
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter Kovesi
- Date Published: September 2019
Abstract:
Relief shading has long been recognised as being an effective way of presenting data. However, the interaction of relief shading and colour is perhaps not widely understood, and many software packages do not combine shading and colour in a physically...
Mapping IOCG-related alteration using 3D gravity and magnetic inversion: an example from the Tennant Creek – Mount Isa region, northern Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: James A. Goodwin*, Roger G. Skirrow
- Date Published: September 2019
Abstract:
To support the Exploring for the Future (EFTF) initiative, identification of possible hydrothermal alteration systems associated with iron oxide copper-gold (IOCG) deposits has been carried out in the Tennant Creek–Mount Isa region of northern Aust...
The Bight Basin, Evolution & Prospectivity I: gravity, deep seismic & basin morphology
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jane Cunneen, Chanel DePledge, Sharon Lowe, Kevin Hill, Candice Godfrey, Amanda Buckingham, Rebecca Farrington
- Date Published: September 2019
Abstract:
Definition of the basement architecture within the Ceduna Sub-basin is poorly understood due to the depth of the basin and limited deep crustal geophysical datasets. This study uses seismic interpretation of BightSPAN™ deep crustal seismic lin...
Processing the first full azimuth OBN survey in Australia: a step change in imaging quality
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Unnikrishnan Chambath, Vincent Ganivet, Sergey Birdus, Joe Zhou, Alain Delorme, Leigh Scoby-Smith, Ivan Gregory, Matt Kovacevic, Tim Williams, Chris Walton
- Date Published: September 2019
Abstract:
Ocean Bottom Node (OBN) acquisition has been widely used in oil and gas industry to provide improved reservoir imaging when compared to conventional narrow azimuth (NAZ) towed streamer data. Its full azimuth (FAZ), high fold count, high repeatability...
Hyperspectral imaging of sedimentary iron ores – beyond borders
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Lionel C. Fonteneau*, Brigette Martini, Don Elsenheimer
- Date Published: September 2019
Abstract:
Banded iron formations (BIFs) and granular iron formations (GIFs) are the two primary types of sediment hosted iron ore deposits and provide the primary source for iron, globally. Although both deposit types are comprised of bedded chemical sediments...
Legacy data – hidden opportunity
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Keith Reeves*
- Date Published: September 2019
Abstract:
As oil prices have rebounded, operators look for new exploration opportunities. A new paradigm, however, is the increased focus on investor return rather than relentless expansion at all costs. This value-focused exploration looks for cost effective ...
DHEM at Las Cruces, Spain – successes and failures
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Gavin R. Selfe*
- Date Published: September 2019
Abstract:
Downhole electromagnetic (DHEM) logging was undertaken within four holes drilled at the Las Cruces VMS body in Spain. The geology of the deposit is geophysically complex inasmuch as the background and overlying geology is conductive. A number of loop...