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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...
IPEx: A lower-cost superior reconnaissance RES/IP/MT survey
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Steve Boucher*
- Date Published: September 2019
Abstract:
This paper presents a technique derived from the full MIMDAS RES/IP/MT survey called IPEx. It offers a more cost-effective, enhanced reconnaissance IP investigation in areas of post-mineral cover, ensuring that a minimumsized predefined chargeable b...
Recent advances on the inversion of deep directional borehole resistivity measurements
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Vladimir Puzyrev*, David Pardo, Víctor Calo, Carlos Torres-Verdín
- Date Published: September 2019
Abstract:
We describe our latest developments on the inversion of subsurface electrical resistivity from deep directional borehole resistivity measurements. Two different methods are introduced for fast inversion of tri-axial induction measurements with multip...
Nova-Bollinger Ni-Cu sulfide ore deposits, Fraser Zone, Western Australia: Petrology of the host intrusions sulfide-silicate textures and emplacement mechanisms of the ores
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Valentina Taranovic*, Stephen J. Barnes, Steve Beresford, John Miller*, Steven Rennick
- Date Published: September 2019
Abstract:
The Nova-Bollinger Ni-Cu sulfide ore deposits are hosted within a suite of mafic-ultramafic intrusive cumulate bodies. The Lower Intrusion is a thin semi-conformable chonolith comprising unlayered mafic to ultramafic orthocumulates, hosting the bulk ...
Managing uncertainty to deliver complex development wells
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Peter van Ruth, Manish Agarwal, Scott Gagen
- Date Published: September 2019
Abstract:
Managing seismic depth uncertainty is a key consideration in placing horizontal development wells into thin reservoir targets. Seismic depth uncertainty has the potential to erode project value through missed reservoir (late landing or reservoir exit...
Access to geological structures, density, minerals and textures through novel combination of 3D tomography, XRF and sample weight
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mikael Bergqvist, Eric Landström, Alexander Hansson, Stefan Luth
- Date Published: September 2019
Abstract:
Scanning drill cores using combined data from X-Ray Transmission and X-Ray Fluorescence, automatically measuring the weight, and performing 3D tomography of the core at the same time, gives a high-resolution 3D visualisation of the structures, textur...
Log dependent approach to predict reservoir facies and permeability in a complicated shaly sand reservoir
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Abdelrahman Elkhateeb*, Reza Rezaee, Ali Kadkhodaie
- Date Published: September 2019
Abstract:
The prediction of facies and permeability in complicated reservoirs represents a major challenge that necessitates the usage of advanced statistical techniques. A new approach is presented in this paper to generate a log based continuous facies log a...
Sensitivity-based data reduction of large 3D DC/IP surveys
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Sarah G.R. Devriese, Robert G. Ellis, Ken E. Witherly*
- Date Published: September 2019
Abstract:
In this paper, we present an algorithm based on the sensitivity of the data to the model space to reduce the large amount of data commonly collected during 3D DC/IP surveys to only those most relevant and important to the model space. The sensitivity...
Application of growing-body potential-field inversion from drillholes
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Kristofer Davis*
- Date Published: September 2019
Abstract:
The application of a growing body style of inversion within the program VPmg is presented. The body begins by a seed and grows until there are no eligible neighbours or the data misfit criterion is fit. In this case, the assumptions of source locatio...
Pore-scale study of fluids flow and fluid-fluid interactions during near-miscible CO2 EOR and storage in oil reservoirs
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Mojtaba Seyyedi*, Mehran Sohrabi
- Date Published: September 2019
Abstract:
CO2 injection in oil reservoirs has been widely accepted as an effective EOR and CO2 storage technique. While oil recovery and CO2 storage potential of this technique at the core scale has been widely studied, complex...
Triassic petroleum systems on the central North West Shelf – Learnings from the greater Phoenix area seismic mapping and geochemical studies
- Publication Name: Australasian Exploration Geoscience Conference 2019
- Authors: Nadege Rollet*, Emmanuelle Grosjean, Dianne Edwards, Richard Kempton, Duy Nguyen, Steve Abbott, Claire Orlov, George Bernardel, Chris Nicholson
- Date Published: September 2019
Abstract:
The greater Phoenix area in the Bedout Sub-basin has experienced recent exploration success on Australia’s North West Shelf (NWS). Oil and gas discoveries in the Triassic reservoirs of the Keraudren Formation and Locker Shale have revived interest ...
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...
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 ...
Integrating geophysical monitoring data into multiphase fluid flow reservoir simulation
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Trevor P. Irons, Brian J.O.L. McPhserson, Nathan Moodie, Rich Krahenbuhl, Yaoguo Li
- Date Published: February 2018
Abstract:
Simulation of multiphase flow systems are of critical importance in managing hydrological systems. Flow simulations are affected by a number of factors including structure and flow properties including porosity and permeability as well as the anisotr...
Quantitative Interpretation: Use of Seismic Inversion Data to Directly Estimate Hydrocarbon Reserves and Resources
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: James Shadlow, Adam Craig, David Christiansen, Robert Mitchell
- Date Published: February 2018
Abstract:
A quantitative interpretation workflow utilising AVO inversion based lithology prediction data was developed to directly assess reserves and resources for an LNG development project in the Carnarvon Basin. The study area is covered by modern MAZ PSDM...
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...
3D VERTICAL SEISMIC PROFILING ACQUIRED USING FIBREOPTIC SENSING DAS – RESULTS FROM THE CO2CRC OTWAY PROJECT
- Publication Name: Australasian Exploration Geoscience Conference 2018
- Authors: Julia Correa, Barry Freifeld, Michelle Robertson, Roman Pevzner, Andrej Bona, Dmitry Popik, Konstantin Tertyshnikov, Thomas Daley
- Date Published: February 2018
Abstract:
Distributed Acoustic Sensing (DAS) is an optical interferometric method for acquisition of acoustic and seismic signals. It uses laser pulses that travel along the length of a fibre-optic cable and backscatter as they encounter small inconsistencies ...
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...
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...