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Beyond chi-squared: Additional measures of the closeness of a model to data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Alan G. Jones*
- Date Published: September 2019
Abstract:
Subtle, and not so subtle, features in our increasingly large and complex datasets are being missed because of our reliance on a single number, typically chi-squared based, to describe the distance between a plausible model and the data. Additional m...
The discovery and geology of Sinclair, Australia’s first caesium deposit
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David J. Crook*, Stuart T. Kerr, Jess A. Booth, Nigel W. Brand, Russell Panting
- Date Published: September 2019
Abstract:
The Sinclair Caesium Deposit, discovered in 2016 by Pioneer Resources Limited, is Australia’s first mining operation to commercially extract the caesium-rich mineral pollucite. Economic caesium deposits are extremely rare, with only three mining op...
Cimatti Field – An example of using seismic amplitude to determine in-place resource
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Michael Micenko*
- Date Published: September 2019
Abstract:
The Cimatti oil field is located in the Exmouth sub-basin offshore Western Australia. The area has good 3D seismic coverage and the Jurassic Macedon Member reservoir is associated with an anomalously high seismic amplitude. These anomalous amplitudes...
Viability of long-short term memory neural networks for seismic refraction first break detection – a preliminary study
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Tasman Gillfeather-Clark*, Eun-Jung Holden, Daniel Wedge, Tom Horrocks, Carlie Byrne, Matthew Lawrence
- Date Published: September 2019
Abstract:
Seismic data processing and analysis focuses on identifying the arrival of seismic waves or ‘first-breaks’. The identification of the arrival of first breaks is complicated by the variance of recording quality typically found across the dataset. ...
The Paleozoic prospectivity of the Offshore Canning area, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Said Amiribesheli*, Andrew Weller
- Date Published: September 2019
Abstract:
The recent oil, gas and condensate discoveries in the Bedout Sub-basin have triggered a change in thinking in this hitherto underexplored region. Recent drilling at Phoenix South-1 (2014), Roc-1 (2015) and Dorado-1 (2018) all found success within the...
A brief description of the Andromeda Zn-Cu prospect in the Albany-Fraser Orogenic belt: A geophysical discovery using HT SQUID
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Paul Polito*, Tony Crawford, Tim Worthington, Mike Whitford, Somealy Sheppard
- Date Published: September 2019
Abstract:
The Andromeda Zn-Cu-Au-Ag prospect is a geophysical discovery that represents the first VMS prospect of significance in the Albany-Fraser Orogenic belt, Western Australia. The prospect was first identified following a ground Transient Moving Loop Ele...
Regional airborne gravity surveys in Western Australia: Considerations for the end user
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Martin Bates*, Stefan Elieff, Krista Kaski, David Howard, John Brett, Richard Lane
- Date Published: September 2019
Abstract:
Regional airborne gravity surveys are being acquired over much of the State of Western Australia by the Geological Survey of Western Australia (GSWA) and Geoscience Australia (GA) to provide coverage where existing ground gravity coverage is sparse. ...
Quaternary buried valley characterization on the Canadian Prairies using a shear land-streamer
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David G. Schieck, Robert B. Hearst*
- Date Published: September 2019
Abstract:
A 72 channel 3-component land-streamer in conjunction with an IVI Envirovibe modified with a transverse shearpack has been constructed and tested over a known >70 m Quaternary buried valley system SE of Calgary, Alberta. Recent near surface seismic ...
Using machine learning to interpret 3D airborne electromagnetic inversions
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Eldad Haber, Jen Fohring, Mike McMillan*, Justin Granek
- Date Published: September 2019
Abstract:
Although 3D airborne electromagnetic inversions have improved greatly in recent years, the presence of smooth boundaries has often been a strong criticism. This smoothness can easily be remedied by applying different types of regularization and const...
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)...
Augmenting 1D conductivity depth sections to include information pertaining to 2D/3D conductors
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Magdel Combrinck*
- Date Published: September 2019
Abstract:
Conductivity depth data presentations derived using 1D approximations have become a very popular way to present airborne electromagnetic (AEM) data. While data profiles and a single error limit per station can accompany these presentations there are ...
The seven rocks that made Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Marita Bradshaw
- Date Published: September 2019
Abstract:
Key geological events of the last 4 billion years have shaped Australia’s present day environment, economy and society; and a limited number of rocks can be chosen to represent this history. Pilbara banded iron formations and Permian coal measures ...
The geological characteristics, geochemical signature and geophysical expression of porphyry copper-(gold) deposits in the circum-Pacific region
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Garwin
- Date Published: September 2019
Abstract:
Porphyry deposits of the circum-Pacific region contain a large amount of the world’s copper, molybdenum and gold. These deposits are formed from calc-alkaline and potassic magmas characterized by varying oxidation states (fO2), which contribute to ...
Orogenic gold deposits: part of a global dynamic conjunction between subduction and gold
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: David I. Groves
- Date Published: September 2019
Abstract:
Orogenic gold deposits represent a coherent deposit class that were deposited from low-salinity CO2-rich fluids over a range of crustal depths from 3 to 20 km. They are widely considered to have formed from crustal metamorphic fluids generated at the...
Twenty years of pre-competitive geoscience data in the Capricorn Orogen: the link between mineral systems and crustal evolution
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Simon P. Johnson
- Date Published: September 2019
Abstract:
State- and federal-generated pre-competitive geoscience data is critical for exploration success. These relatively low-cost but high-quality regional-scale datasets ultimately reduce the financial risk to explorers by reducing the search space and al...
Geology of Australian ore deposits
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: G Neil Phillips*, Kristy Burt
- Date Published: September 2019
Abstract:
The Australian Ore Deposits monograph, published recently by The Australasian Institute of Mining and Metallurgy, has its focus on descriptive summaries of ore deposit geology. These summaries are expected to be long-lasting compilations with value w...
CCS in Australia: Activities and Lessons Learned
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Linda Stalker
- Date Published: September 2019
Abstract:
There is the perception that somehow carbon capture and storage (CCS) is too expensive, too complex, and already by-passed by other technologies in Australia. However the challenge of meeting Australia’s commitments to LNG contracts for a growing m...
Marine Vibrator Concepts for Modern Seismic Challenges
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Andrew Long, Rune Tenghamn
- Date Published: February 2018
Abstract:
Aside from historical issues of mechanical durability and efficiency, the design of marine vibrators (MVs) for towed streamer operations are confronted by several practical challenges to their different possible applications: 1. Alternatives to conve...
A double double-porosity model for wave propagation in patchysaturated tight sandstone with fabric heterogeneity
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Jing Ba, Mengqiu Guo, Wenhao Xu, Fengyuan Sun, Lin Zhang, Wei Cheng
- Date Published: February 2018
Abstract:
In natural reservoir rocks, fabric heterogeneity can further induce heterogeneous geometrical distribution of immiscible multi-phase fluid mixture, since fluid migration may be affected by lithological variation (mainly permeability) in geological ti...
COULD THE MESOPROTEROZOIC KYALLA FORMATION EMERGE AS A VIABLE GAS CONDENSATE SOURCE ROCK RESERVOR PLAY IN THE BEETALOO SUB-BASIN?
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Carl Altmann, Elizabeth Baruch, David Close, Mohinudeen Faiz, Brenton Richards, Alexander Cote
- Date Published: February 2018
Abstract:
Reservoir and geomechanical analysis of Kyalla Formation core and wireline logs acquired at Beetaloo W-1 indicate the presence of two potential Source Rock Reservoir (SRR) intervals; the middle Kyalla SRR and the lower Kyalla SRR. The key properties ...
FIBRE-OPTIC VSPS: BOREHOLE SEISMIC REVOLUTION IN AUSTRALIA
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Dr. Konstantin Galybin, Tsunehisa Kimura, Fargana Exton
- Date Published: February 2018
Abstract:
The borehole seismic industry is undergoing a quantum leap in the acquisition technology. The standard borehole seismic imaging tools such as accelerometers and geophones are now being replaced by the fibre-optic (FO) acquisition for basic surveys su...
The influence of reverse-reactivated normal faults on porosity and permeability in sandstones: a case study at Castle Cove, Otway Basin
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Natalie Debenham, Natalie J. C. Farrell, Simon P. Holford, Rosalind C. King, David Healy
- Date Published: February 2018
Abstract:
An understanding of fault zone structure and transmissibility can have significant implications for reservoir appraisal and development within petroleum systems. Studies tend to focus on low porosity host rocks that have experienced simple tectonic h...
Isotope Constraints on Intra-Basin Correlation and Depositional Settings of the Mid-Proterozoic Carbonates and Organic-Rich Shales in the Greater McArthur Basin, Northern Territory, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Juraj Farkas, Maxwell Bullen, Grant Cox, Alan Collins, William Giuliano, Sandra Menpes, Juergen Gusterhuber, Belinda Smith
- Date Published: February 2018
Abstract:
The Greater McArthur Basin in northern Australia forms the world’s oldest potential unconventional gas play. It comprises Paleo- to Mid-Proterozoic sedimentary successions (i.e., the McArthur and Limbunya Groups) dominated by carbonate rocks (i.e.,...
Portable X-ray diffraction for unconventional and conventional petroleum exploration
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Dane Burkett
- Date Published: February 2018
Abstract:
X-ray diffraction (XRD) is a well-established technique in the earth sciences as it can be used to identify and quantify minerals and is particularly useful for fine-grained sedimentary rocks. Due to the capital cost, environmental requirements and s...
Ranking DHI attributes for effective prospect risk assessment applied to the Otway Basin, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Sebastian Nixon, Tony Hallam, Andrew Constantine
- Date Published: February 2018
Abstract:
The first evidence of seismic brightening linked with gas charged reservoirs was recognised by Shell in the very late 1960s in the Gulf of Mexico. Since that time the terms bright spots, flat spots, amplitude versus offset (AVO) anomalies or gas anom...
Least Square Q-Kirchhoff Migration: Implementation and Application
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Xiaodong Wu, Yi Xie, Joe Zhou, Dechun Lin, Yu Wang
- Date Published: February 2018
Abstract:
Absorption effects caused by the anelastic nature of the earth lead to the attenuation of amplitude and distortion of phase of seismic waves. The so-called quality factor “Q” accounting for this absorption effect has to be included for correct im...
CA-IDTIMS and biostratigraphy: Their impact on exploration
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: John Laurie, Tegan Smith, Simon Bodorkos, Bob Nicoll, Jim Crowley, Dan Mantle, Geoff Wood
- Date Published: February 2018
Abstract:
Uranium-Lead dating of Zircon using the Chemical Abrasion-Isotope Dilution Thermal Ionisation Mass Spectrometry (CA-IDTIMS) technique has largely overcome the problem of radiogenic lead loss, and has greatly improved the precision of the dating. That...
Modelling complex near-surface features to improve shallow seismic exploration
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Shaun Strong
- Date Published: February 2018
Abstract:
Land seismic exploration is often limited or impacted by complex structures in the near surface. These can include large variations in velocities related to weathering (low velocity) or basalts (potentially high velocity).
In this paper we use fin...
Analysis of Time-Lapse Seismic and Production Data for Systematic Reservoir Model Classification and Assessment
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Rafael Souza, David Lumley, Jeffrey Shragge, Alessandra Davolio, Denis Schiozer
- Date Published: February 2018
Abstract:
The heterogeneous distribution of reservoir properties is one of the most important uncertainties in static and dynamic reservoir modelling. Petrophysical properties are usually interpolated within reservoir models from sparse well-log data, which ca...
Impact of artificially matured organic matter on the dielectric and elastic properties of compacted shales
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Matthieu Cauchefert, Matthew Josh, Lionel Esteban, Stephanie Vialle, Maxim Lebedev, Jeremie Dautriat, Joel Sarout, Bruce Maney
- Date Published: February 2018
Abstract:
Unconventional gas shale resources recently became a standard in the American oil and gas industry and are studied throughout the world. However Gas shales are still poorly characterised with respect to other reservoir rock types. The organic matter ...