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Magnetotelluric inversion strategies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ralf Schaa*, Brett Harris, Andrew Pethick
- Date Published: September 2019
Abstract:
Regional scale geophysical data is widely and publicly available in many countries. Traditionally, these data include transects that span many hundreds of line kilometres. More recently it was recognised that imaging deep three dimensional crustal st...
Rift initiation on Australia’s southern margin: insights from the Bremer Sub-basin
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jane Cunneen, Amanda Buckingham, Cecilia D’Ercole
- Date Published: September 2019
Abstract:
The Bremer Sub-basin occupies a unique position on Australia’s south-west margin. It is influenced by two rift events associated with the breakup of Gondwana: rifting along Australia’s western margin in the Early Cretaceous as well as the souther...
Application of multi-element geochemistry in the weathered environment: Controls, considerations and implications for exploration
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Fiona Best, Matthew Readford, Kristina Walcott
- Date Published: September 2019
Abstract:
Understanding the mobility of individual elements in the oxidised environment is important for the accurate interpretation of geochemical data from regolith and weathered bedrock samples. In the weathered environment, immobile element geochemistry ca...
Eromanga oil traps – a multi field post-mortem
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Keith Martens*
- Date Published: September 2019
Abstract:
The purpose of this paper is to examine the remaining oil potential of the Eromanga Basin, specifically in the Cooper region....
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...
Using zircon geochemistry to map alteration in the Gawler Craton, South Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Adrienne Brotodewo*, Caroline Tiddy, Diana Plavsa, Adrian Fabris
- Date Published: September 2019
Abstract:
Zircon is a refractory mineral that is able to crystallize within hydrothermal, igneous and metamorphic environments, resulting in extreme variability in its external morphology, internal textures and chemistry. The chemistry of zircon is sensitive t...
Driving the paradigm shift of near surface exploration geochemistry using ultrafine soils
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ryan Noble, Ian Lau, Tenten Pinchand, Ravi Anand, Paul Morris
- Date Published: September 2019
Abstract:
Soils are widely used as a geochemical sample medium. These samples are sieved to <250 µm or <180 µm to remove larger gravels and coarse sand and later pulverized for analysis, but no other refinement is commonly used. Why is this the case? In tran...
Maximising value from seismic using new data and information management technologies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Jess B. Kozman*, Matthew Holsgrove
- Date Published: September 2019
Abstract:
Geophysical data is one of the key decision support factors for successful discovery of hydrocarbons, and operators have multi-decadal inventories of survey data in key basins. Woodside has a history of exploration in Australia from 1954 and seismic ...
Analysis of Geophysical Datasets for Coastal Vulnerability and Asset Management
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter Eccleston, Andrew Spyrou
- Date Published: September 2019
Abstract:
As part of Western Australia’s State and Coastal Planning Policies, local councils are formulating Coastal Hazard Risk Management and Adaptation Plans (CHRMAP) with the aim of rating areas of concern with a risk level and to assist in future planni...
Feasibility of the quantitative time-lapse seismic characterisation of a heterogeneous CO2 injection
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Roman Isaenkov, Stanislav Glubokovskikh, Boris Gurevich
- Date Published: September 2019
Abstract:
CO2 injection into clastic brine-saturated reservoirs leads to a detectable reduction of the elastic moduli of the reservoir rocks. However, quantitative interpretation of the time-lapse seismic anomalies obtained for CO2 storag...
“Is it pyrite, or a shed?”: intricacies of induced polarisation surveying near grounded metallic infrastructure
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Regis Neroni*, Sam Corbett
- Date Published: September 2019
Abstract:
Metallic grounded infrastructure commonly found in built-up areas such as fences, sheds and various dwellings, can produce induced polarisation anomalies often indistinguishable from bedrock responses typically targeted by base and precious metals ex...
Bayesian geophysical inversion with Gaussian process machine learning and trans-D Markov chain Monte Carlo
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Anandaroop Ray*, David Myer
- Date Published: September 2019
Abstract:
A key aspect of geophysical inversion is the ability to model the earth with a low dimensional representation. There exist various approaches to solve the inverse problem. However, most methods do not automatically adapt inverse model complexity or t...
Resistivity structure of the Link East MT transect in the Southern Curnamona Province
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Ben Kay*, Kate Robertson, Stephan Thiel, Graham Heinson
- Date Published: September 2019
Abstract:
We present results of 18 magnetotelluric (MT) stations from the Link East transect adjacent to the 03GA-CU1 Curnamona deep crustal seismic reflection line in the southern Curnamona Province, South Australia. The transect was designed to provide resis...
Dude, where’s my AVO? A case study from the Browse Basin, North West Shelf, Australia
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Said Amiribesheli*, Jordan McGlew, Joshua Thorp
- Date Published: September 2019
Abstract:
The Braveheart-1/ST1 well (2009) was drilled on a pronounced Class III AVO anomaly identified on the Braveheart 2D and Braveheart infill 2D seismic data in the Browse Basin, Australia. The well was dry with no indication of hydrocarbons. During a pos...
Smart stitching: adding lateral priors to ensemble inversions as a post-processing step
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Gerhard Visser*
- Date Published: September 2019
Abstract:
The last decade has seen extensive development of Bayesian geophysical inversion methods which produce ensembles of models as outputs. Many of these are limited to producing 1D or very simple and narrow models. It is well established that tying such ...
Determining petrophysical and hydrogeological parameters from historical bore logs for the Leederville-Parmelia aquifer, northern Perth Basin, using regression methods
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Olga Filiptsova*, Sheryl Ryan
- Date Published: September 2019
Abstract:
A new workflow of bore data re-interpretation that increases the value of old data with only a minimal cost has been developed. The workflow estimates hydraulic and petrophysical parameters from historical bore data, providing clay volume, total poro...
MT conductivity signatures of mineral systems: 3D MT over the Eastern Goldfields Super Terrane, Yilgarn Craton
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kate Selway, Mike Dentith, Sinan Özaydın
- Date Published: September 2019
Abstract:
Magnetotellurics (MT) is emerging as a key tool for understanding giant mineral systems. For MT to be effective in mineral exploration we require both an improved understanding of the causes of electrical conductivity anomalies and an increased numbe...
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...