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Which anomaly should I drill? Using spatial statistics to inform exploration in covered IOCG terranes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Laszlo Katona*, Adrian Fabris
- Date Published: September 2019
Abstract:
This contribution presents a method for efficiently classifying geophysical anomalies and identifying regions and features that share characteristics of many known iron-oxide-copper-gold (IOCG) deposits of the Gawler Craton, and can therefore be used...
Geological investigations with high spatial resolution WV-3 satellite imagery and regional geophysics at the Haib Cu porphyry, Namibia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: R.D. Hewson*, E. Chinkaka, M. van der Meijde, B. Baugh, N. Titus, J.P. Mubita
- Date Published: September 2019
Abstract:
Recent improvements in available multi-spectral satellite-borne shortwave infrared sensors and their spatial resolution opens up the opportunity for furthering surface mineralogy mapping. Their image interpretation can be augmented with regional geop...
Using finite dipole lengths in complete earth 3D MT modelling
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Wolfgang Soyer, Federico Miorelli, Randall Mackie
- Date Published: September 2019
Abstract:
We have quantified the use of finite electric dipole lengths from the point measurement assumptions typical in 3D MT inversion modeling. Electric fields are measured across dipoles of typically 50 m to 200 m at MT soundings. Modeling algorithms, howe...
Learnings from the Gawler Craton airborne survey quality control
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Matthew Hutchens
- Date Published: September 2019
Abstract:
The Geological Survey of South Australia (GSSA) designed the Gawler Craton Airborne Survey (GCAS) to provide high resolution magnetic, gamma-ray and elevation data covering the northern portion of the Gawler Craton. In total, 1.66 million line km wer...
3D interpretation of geological, 3D seismic and conventional geophysical data from the Darlot Gold Mine
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Glenn Pears, James Reid*, John McGaughey, Will Turner, Graeme Hird
- Date Published: September 2019
Abstract:
The Darlot gold mine is an Archean orogenic deposit located in the world-class gold and nickel terrain of the Yandal granite-greenstone belt, part of the Yilgarn Craton in Western Australia....
Full waveform inversion of simultaneous long-offset data
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nizar Chemingui, Alejandro A. Valenciano, Andrew Long*
- Date Published: September 2019
Abstract:
The standard workflow for velocity model building (VMB) in complex regimes is an interpretive process that requires time-consuming manual intervention and remains an error-prone process that can produce suboptimal results. We discuss an application o...
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...
Reservoir Modelling, Structural History and Volumetrics of the Jerboa Area, Eyre Sub-Basin
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Jordan McGlew, Prof. Gregory Smith
- Date Published: February 2018
Abstract:
The Eyre Sub-basin is situated in the Bight Basin in the Southern Margin. It covers an area of approximately 8,000km2. It is one of several half-graben in the Bight Basin that formed during the initial rifting between Australia and Antarctica. Sedime...
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.,...
Solid substitution: theory versus experiment
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Yongyang Sun, Maxim Lebedev, Vassili Mikhaltsevitch, Stanislav Glubokovskikh, Stefan Iglauer, Boris Gurevich
- Date Published: February 2018
Abstract:
Gassmann fluid substitution is widely used in geophysical practice. In the last few years, the topic of fluid/solid substitution has emerged, where the substances filling the pore space can be solids, fluids, or visco-elastic materials, such as heavy...
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...
Geochemistry of storing CO2 and NOx in the deep Precipice Sandstone
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: J. K. Pearce, D. Kirste, G.K.W. Dawson, I. Altaf, S.D. Golding, J. Undershultz
- Date Published: February 2018
Abstract:
The Precipice Sandstone in the Surat Basin is being appraised for CO2 geological storage owing to its high porosity and permeability and expected high injectivity. Generally it is quartz rich with variable kaolinite, however detailed characterisation...
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...
Broadband Least-Squares Wave-Equation Migration
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Shaoping Lu, Alejandro Valenciano, Nizar Chemingui, Andrew Long
- Date Published: February 2018
Abstract:
We introduce an effective iterative Least-Squares Wave-Equation Migration (LS-WEM) solution for broadband imaging. LeastSquares Migration (LSM) solutions are designed to produce images of the subsurface corrected for wavefield distortions caused by a...
TERTIARY DEEP-WATER CORAL SUPPORTS COLD SEEPS IN THE CEDUNA SUB-BASIN
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Laurent Langhi, Julian Strand, Andy Ross, Karen Gowlett-Holmes, Emanuelle Frery, April Pickard
- Date Published: February 2018
Abstract:
The analysis of new 3D seismic and the acquisition of unique core data enables an in-depth interpretation of outboard Eocene mounds in the central Ceduna Sub-basin and a more accurate model of their origin. ...
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...
Rock-physics based time-lapse inversion in Delivery4D: synthetic feasibility study for CO2CRC Otway Project
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Stanislav Glubokokvskikh, Roman Pevzner, Dmitry Popik, Christian Proud, James Gunning, Tess Dance
- Date Published: February 2018
Abstract:
Conventional approach to 4D seismic inversion consists of parallel inversions applied to seismic vintages. Only then, the inverted changes of seismic attributes are converted into petrophysical properties using rock physics. The paper develops a robu...
FEASIBILITY OF SEISMIC MONITORING OF CCS IN PERTH BASIN
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Stanislav Glubokovskikh, Andrej Bona, Roman Pevzner, Anton Egorov, Ludovic Ricard
- Date Published: February 2018
Abstract:
This work studies seismic response of injection of super-critical CO2 in Perth Basin, WA for the purpose of CO2 sequestration. We aim to propose the most suitable way of monitoring and verification of such storage. To this end, we generated synthetic...
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...
EVOLVING EXPLORATION METHODS IN THE HYDROCARBON PLAY WITHIN THE PATCHAWARRA FORMATION ON THE WESTERN FLANK, COOPER BASIN
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Johann Soares, Christopher Webb
- Date Published: February 2018
Abstract:
The hydrocarbon play in the Patchawarra Formation lies within a Permian age, high latitude, fluvial sand and coal measure system that is up to 300m thick in the Cooper Basin of Central Australia. Fluvial channel belt sands, ranging from 1 to 20m thic...
Regional migration and trapping frameworks in the frontier ceduna sub-basin: new insights from stratigraphic forward modelling and ‘triangle juxtaposition’ diagrams
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Laurent Langhi, Julian Strand, Andrew Ross, Emanuelle Frery
- Date Published: February 2018
Abstract:
In the Ceduna Sub-basin oil-prone source rocks, reservoirs and seals are predicted in Late Cretaceous Turonian through Santonian (Tiger) and Campanian through Maastrichtian (Hammerhead) marine and deltaic Supersequences (Totterdell et al, 2000). Desp...
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...
Methods for reducing unwanted noise (and increasing signal) in passive seismic surveys
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Tim Dean, Aidan Shem, Mus’ab Al Hasani
- Date Published: February 2018
Abstract:
Passive seismic surveys are becoming of increasing interest for characterising the near surface, in particular the depth of cover. For passive seismic acquisition ambient noise is both signal and noise. The ‘signal’ component is generally conside...
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...
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...
Application of time-lapse full waveform inversion of vertical seismic profile data for the identification of changes introduced by CO2 sequestration
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Anton Egorov, Andrej Bόna, Roman Pevzner, Stanislav Glubokovskikh, Konstantin Tertyshnikov
- Date Published: February 2018
Abstract:
Seismic methods are frequently used for the purpose of monitoring of time-lapse changes introduced by CO2 sequestration. Surface seismic is often considered as the main tool for monitoring. Vertical Seismic Profile (VSP) is occasionally applied as an...
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...
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 ...
STROMATOLITE CONSTRUCTION, BIOFACIES AND BIOMARKERS IN THE LOWER CAMBRIAN HAWKER GROUP, ARROWIE BASIN, SOUTH AUSTRALIA
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Bronwyn L. Teece, Simon C. George, Glenn A. Brock
- Date Published: February 2018
Abstract:
Stromatolites are laminated microbial deposits, normally composed of accretionary layers of cyanobacteria and other (often anoxic) bacteria which form on the sediment-water interface. Stromatolites represent one of the earliest records of life on Ear...
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 ...