SOUTH AFRICAN GEOPHYSICAL ASSOCIATION 2005
WEDNESDAY 14 SEPTEMBER
SESSION 1
OPENING PLENARY
09:00 Welcome: Robin Sutherland, Chairman SAGA 2005
09:30 Klaas Koster, Vice President SEG
What’s new in Society, Exploration, and Geophysics
09:50 The role of a professional society in fostering the multi-disciplinary future of exploration and production.
Theo Kortekaas, Vice President EAGE
10:10 Prizewinning published paper
10:30 TEA
TRACK1
SESSION 2
TRACK2
MULTIDISCIPLINARY
SESSION 3 SEISMICS
11:10
Combined stochastic and deterministic modelling as an
innovative approach to jointly interpret multi-method airborne
geophysical data sets
Detlef G Eberle, Research & Airborne Geophysicist, Federal
Institute for Geosciences & Natural Resources (BGR) of Germany
The establishment of AfricaArray and sustainable geophysics
training
Paul Dirks, University of the Witwatersrand
11:30
Innovative data processing methods for gradient airborne
geophysical datasets
Desmond Fitzgerald, Managing Director, Intrepid Geophysics
The Initiation of the South Atlantic Ocean: The broad context,
the local questions
Colin Reeves, Professor and Consultant, Earthworks
11:50
Creating realistic 3D Geology models rapidly, using geophysics
to test them
Philip McInerney, New Product Manager, Intrepid Geophysics
"AfricaSpan" regional 2D seismic and potential field programs
Neil Taylor, Business Development Manager, GX Technology
12:10
Multidisciplinary geophysical investigations applied to
unconformity-associated uranium exploration,
Athabasca Basin, Canadian Shield
Michael David Thomas, Research Scientist, Geological
Survey of Canada, Natural Resources Canada
The value of long offset acquisition offshore Namibia
Steve Toothill, Interpretation Advisor, Veritas DGC
12:30
LUNCH
SESSION 4
13:50
MAGNETICS
On kimberlite detection in brown-field exploration:
some challenges to geophysics
Moctar Doucouré, Senior Technical Specialist, De Beers Group
Services
SESSION 5
SEISMIC + MULTIDISCIPLINARY
Smarter depth information: using geology in
geophysical inversions
Chris Wijns, Group Geophysicist, Resolute Mining
Implications of palaeogeotherms for the thermal
history of the Witwatersrand Basin, South Africa
Michael Jones, Senior Research Officer, University of
the Witwatersrand
14:10
Some thoughts on the crustal structure of the
Mauritanides as revealed by geophysical data
Jaco Smit, Senior Geophysicist, Council for Geoscience
14:30
A 3D magnetic model of the Vredefort impact
structure: Preliminary results of a magnetic survey
over the granulite-amphibolite transition
Manfriedt Muundjua, Student, University of the
Witwatersrand
Comparison of seismic location methods on a South
African gold mine
Ben Young, Seismologist, GeoHydroSeis
14:50
New palaeomagnetic data from the main and upper
zones of the Bushveld Complex
Shawn Letts, Student, University of the Witwatersrand
Seismic magnitude and its application in the South
African mining industry
Darren Burrows, Seismologist, GeoHydroSeis
15:10
TEA
15:10
SESSION 6
MAGNETICS AND
MULTIDISCIPLINARY
TEA
SESSION 7
SEISMICS
15:50
Coaltech2020 - Aeromagnetic Merge Project
Stephanus Johannes du Plessis, Divisional
Geophysicist, Anglo American
Fast track reservoir characterisation of a subtle
Paleocene deep marine turbidite field using a rock
physics and seismic modelling led workflow
Henry Morris, Lead Geophysicist, Ikon Science
16:10
Enhancing extended Euler deconvolution
Gordon Cooper, Associate Professor, University of the
Witwatersrand
The applicability of various seismic offset reflectivity models
George Smith, Senior Lecturer, University of Cape Town
16:30
Testing of geodetic and geophysical parameters on
potential sites for space geodesy observatory
Sakia Madiseng, Student, University of the
Witwatersrand and HartRAO
Program realization of direct and inverse problems
of the AVO
Liliya Malovichko, Geophysicist, Permneftegeofyzica
16:50
Development of an environmental geophysics test site
Stoffel Fourie, Geophysicist, Council for Geoscience
The fluid factor angle applied to the Sable oil field area (South Africa)
Buhlebufikile Pius Hlatshwayo, Intern Geophysicist,
Petroleum Agency SA
THURSDAY 15 SEPTEMBER
SESSION 8 GRAVITY
SESSION 9 SEISMICS
08:30
Errors assessment of airborne vertical gravity data
processing procedures
Laurent Ameglio, Chief Geophysicist, Fugro Airborne
Survey
Ibhubesi Field, South Africa: is cross-plotting of AVO attributes a
reliable / suitable technique to predict gas directly
Mxolisi Mbandezi, Student, University of Cape Town
08:50
Quality measures for airborne gravity gradiometry
Karel Zuidweg, Business Development Manager, Bell
Geospace Limited
Adding value to old seismic data through re-processing
Mark Gibson, Consultant, GeoScience Solutions
09:10
The application of the continuous wavelet transform
to potential field data
Gordon Cooper, Associate Professor, University of the
Witwatersrand
Case studies on Kirchhoff and wave equation anisotropic PSDM
Sergio Grion, Research Geophysicist, Veritas DGC
09:30
Processing of gravity data using gravity wavelets
Antony Chatu, Student, University of the
Witwatersrand
09:50
Three-dimensional gravity model of the
Witwatersrand Basin and Vredefort impact
Structure
Stephen Coomber, Student, University of the
Witwatersrand
AVO analysis unlocking additional reserves?
Andrew Dippenaar, Chief Geophysicist, PetroSA
10:10
TEA
10:10
Angle gathers for wave equation pre stack depth migration
Pierre Lanfranchi, R&D Manager, CGG
TEA
SESSION 10 GRAVITY + RADAR
SESSION 11 ELECTRICAL
10:50
Imaging deep geology using full tensor gravity
gradiometry inversion: K-2, deepwater Gulf of Mexico
Phillip Houghton, Sales Manager, ARKeX
Application of the multi-electrode resistivity method to surfacewater/ground-water interaction as applied to vegetation controls
Louise Soltau, Hydrogeophysicist, CSIR Environmentek
11:10
Detail geophysical investigation - Anglo Platinum –
Paardekraal shaft
Stephanus Johannes du Plessis, Divisional
Geophysicist, Anglo American
Surface nuclear magnetic resonance (SNMR) sounding technique
applied to primary aquifers in Southern Africa
Reinie Meyer, Project leader, CSIR Environmentek
11:30
Borehole radar EM wave simulation for mining
applications using a parallel implementation of the
3-D FDTD algorithm
Pradip Mukhopadhyay, PhD Student, University of
Cape Town
Electro-kinetic soundings with a TDEM instrument
Valeriya Hallbauer-Zadorozhnaya, Senior Scientist,
Council For Geoscience
11:50
Improved interpretation of borehole radar data
through interactive 3D forward modeling
Declan Vogt, Manager, CSIR Miningtek
In-mine electrical resistance tomography (ERT)
Michael van Schoor, Senior Research Geophysicist,
CSIR Miningtek
12:10
Borehole radar delineation of the UG2 reef at
Modikwa Platinum Mine
Petro du Pisani, Research Geophysicist, CSIR
Miningtek
Development of a combined resistivity and induced polarization
instrument for the laboratory environment
Leonie Mare, Geophysicist, Council for Geoscience
12:30
LUNCH
12:30
LUNCH
SESSION 12 ELECTRO-MAGNETICS
SESSION 13 DRILL (BOREHOLE)
13:50
Application of an improved S-layer differential
transform on TDEM sounding data to delineate an
iron ore deposit
Magdel Combrinck, Lecturer, University of Pretoria
Borehole orientation surveys: Results from a benchmark study
Anton Wolmarans, Section Geophysicist, De Beers
14:10
Numerical integration for reducing degree of
generated noise
Solomon Lephoto, Student, University of Pretoria
Borehole orientation surveys: Results from a benchmark study
Anton Wolmarans, Section Geophysicist, De Beers
14:30
Effects of uneven terrain on forward modeled
TDEM data
Josphat Mahanyele, Student, University of Pretoria
The effect of magnetometer and accelerometer errors on the predicted
trajectories of boreholes surveyed by EMS instruments
Wessel van Brakel, Research Engineer, University of Stellenbosch
14:50
The development of low temperature SQUID
systems for the geosciences
Tiaan le Roux, Manager Geophysical Research, Anglo
American
Recommendations for wire-line calipers
Reece van Buren, Geophysicist, De Beers
15:10
TEA
15:10
TEA
SESSION 14 ELECTRO- MAGNETICS
SESSION 15 SEISMICS
15:50
IP effect as an indicator of hydrocarbon
contamination of ground water. A new case study in
South Africa
Valeriya Hallbauer-Zadorozhnaya, Senior Scientist,
Council for Geoscience
Hybrid velocity modeling for depth imaging: Examples from offshore
Gabon
Michael Schoeman, Manager Depth Imaging, Geophysical Development
Corporation
16:10
2.5-D inversion of airborne electromagnetic data
Glenn Wilson, Postdoctoral Fellow, CSIRO Division of
Exploration and Mining
3D surface-related multiple removal, a hybrid approach
Neil Hargreaves, Senior Research Geophysicist, Veritas
DGC
16:30
Electromagnetic measurement of coal roof-beam
thickness
Liam Candy, Research Engineer, CSIR Mining
Technology
Application of high-resolution 3D seismic to mine planning in platinum
shallow mines
Eric Gillot, Area Geophysicist, CGG
16:50
Comparison of the capabilities of neutron
tomography with X-ray tomography on geological
Hard layer investigation at Namakwa Sands
Kazek Trofimzcyk, Section Geophysicist, Anglo American
samples
Nono Mary Mahlatji, Student, University of the
Witwatersrand
FRIDAY 16 SEPTEMBER
SESSION 16 MAGNETO-TELLURICS
SESSION 17 SEISMICS
09:10
Comparison of the electromagnetic structure of
Archean cratons
Alan Jones, Senior Professor, Dublin Institute for
Advanced Studies
Total volume interpretation: A holistic approach to seismic structure
and reservoir characterization
Charles Thomas, Business Development Manager, Halliburton Digital &
Consulting Solutions
09:30
Electrical anisotropy across southern Africa derived
from MT studies and compared with seismic
anisotropy results
Mark Hamilton, Student, University of the
Witwatersrand & Dublin Institute for Advanced Studies
Acoustic / Chirp surveys applied on Coal (A world first?)
Stephanus Johannes du Plessis, Divisional Geophysicist, Anglo American
09:50
Application of wavelet transform de-noising
techniques to geophysical data
Janine Cole, Geophysicist, Council for Geoscience
Electric and electromagnetic methods: an opportunity to enhance the
seismic reflection tool
Charles Boulanger, Manager for Subsurface methods, CGG
10:10
Titan-24: the application of distributed array
technology to geological mapping and target definition
Simon John Bate, Managing Director, Quantec
Geoscience Africa
Simultaneous inversion of pre-stack seismic data
Brian Russell, Vice President, Veritas DGC
10:30
TEA
10:30
TEA
SESSION 18 MULTIDISCIPLINARY
10:50
Geophysical characterisation and delineation of the
AK6 kimberlite
Anre Vorster, Manager Geophysics, De Beers
11:10
Contributions to the gravity field of Southern Africa
from crustal thickness variations and mantle seismic
velocity variations
Susan Webb, Lecturer, University of the Witwatersrand
11:30
The use of binary encoding in the identification of
rock types from low level airborne near-infra-red
measurements
Edgar Stettler, Principle Scientist, Council for
Geoscience
11:50
Visibility filtering of potential field data
Gordon Cooper, Associate Professor, University of the
Witwatersrand
12:30 CHAIRMAN CLOSING