Congratulations to Shaun Strong and Alan Meulenbroek on the successful completion of their PhD and Masters Degree respectively. We are very pleased to have such talented geophysicists working in our research, acquisition, and processing departments.
Shaun Strong graduated from University of Queensland with a first-class honours degree in geophysics (B.Sc.(Hons)) in 2003. After a short period doing gravity acquisition, he joined Velseis, working in production data processing and more recently R&D. Currently, his primary focus is on multicomponent research, including acquisition, data processing, algorithm development, and interpretation.
Thesis Title: “Resolution Enhancement in Shallow 3D-PS Seismic Reflection”
“This thesis aims to advance methodology for acquiring and processing 3D multicomponent (PS) seismic data for shallow (<300 m) exploration targets. The primary focus is to improve seismic resolution, and hence geological interpretation, for coal-scale targets.
This research has demonstrated that achieving good PS resolution is challenging, and requires careful consideration of multiple factors in the design, acquisition and processing chain. Of particular interest are the methods used to corrected for near-surface statics and complex velocities. The range of methodologies demonstrated here will further advance the practical application of PS reflection at the coal scale.”
Alan Meulenbroek graduated from the University of Queensland in 2006 with a Bachelor of Applied Science in Geophysics with first class honours. Since then, he has been employed at Velseis, undertaking various field roles ranging from juggie, to line-boss and observer for 2D crews. During that time, he also worked in the R&D department with research focusing on multicomponent seismic and geophysical inversion. Since late 2015, Alan has worked in Velseis Processing as a data processor and interpreter for 2D and 3D data.
In 2016 he obtained his master’s degree from UQ with a thesis titled “Inversion of seismic refraction amplitudes for near-surface velocity control”.
Short summary of thesis:
Knowledge of near-surface seismic velocities is important for processing deeper seismic imagery, and also for geotechnical purposes. This thesis examines a novel approach for estimating velocities via analysis of refraction amplitudes. Theory suggests that head-wave amplitudes depend on factors including velocities above and below the refractor. This study demonstrates least-squares inversion of observed refraction amplitudes, aimed at separating the causal parameters. This leads to estimation of P-wave velocity in the layer above the refractor. Analysis of synthetic and real data indicates that the inversion methodology is viable. The practical evaluation clearly indicates that in reality observed refraction amplitudes are strongly influenced by factors not included in classical theoretical models.
On Friday 22nd of March Steve Hearn acknowledged the hard work and dedication of these long serving staff members:
5 yr awards
15 year awards
Well done to all.
Velseis will be exhibiting at the following oil and gas conferences this year.
28 April – 1 May: Advantage NZ 2013 in Auckland
26 – 29 May: APPEA 2013 in Brisbane
11 – 14 August: ASEG 2013 in Melbourne
18 – 21 August: West Australian Basin Symposium 2013 in Perth
3 – 4 September: The Good Oil Conference in Fremantle
You can now follow updates from Velseis in your Twitter feed. Just click on the Twitter icon we have added to the top right corner of our website. A new tab will open in your browser and you will be taken to https://twitter.com/velseis
Since the early 80’s Velseis Pty Ltd has been at the forefront of the provision of seismic services to the Australian resource industry. Today the company prides itself on providing a fully integrated suite of seismic technologies, including survey design, drilling, acquisition, data processing and interpretation.
As one part of this diversity, Velseis is able to offer its clients a range of industry accepted seismic sources, including Explosives, Mini-SOSIE and Vibroseis. These provide the means to optimise each survey in terms of geophysical, logistical, environmental and economic objectives.
With an expanding seam gas market and recognising the need to produce
reliable coal seam imagery at deeper levels, in 2008 Velseis introduced the
EnviroVibe into the Australian seismic market. Despite being a medium weight
(8 tonne) Vibroseis unit, it provides high-quality deep imagery. A major attraction is that this can be achieved very safely, and with a reduced environmental footprint.
In another Australian first, Velseis is now pleased to announce the introduction of the UNIVIB to complement its suite of seismic sources. As with the EnviroVibe, the build of the UNIVIB satisfies the requirements to acquire seismic data safely, and in an environmentally considerate manner. What sets this unit apart, is that the hold-down mass can be increased to 12 tonnes, particularly suited for deeper targets. The UNIVIB has the ability to sweep over a very wide frequency range (1-475Hz), making it attractive for a range of applications, from shallow high-resolution coal reflection through to deeper gas and petroleum
A data sheet has been attached for the UNIVIB, and Velseis representatives
would be pleased to discuss the capabilities of the UNIVIB in greater detail.
26,000lb Peak Force
- New vibrator buggy design for small to mid range source acquisition
- Flexible options support Pre-Loaded Stilt Structure (PLS) actuator or accelerated impulse source
- Smaller footprint provides easier mobility through environmentally sensitive areas
- Up to 26,000 lbs of peak force with frequency range of 1 Hz to 475 Hz*
- Fully integrated with INOVA’s Vib Pro source controller for greater control, timing, QC, and lower distortion
- Pre-Loaded Stilt Structure prolongs the life of parts
- Simplified Operator Controls
- Improved Operator Visibility
- Articulated, Oscillated Steering
- High Capacity Hydraulic Cooling
Yesterday our CEO, Steve Hearn, thanked the following people for their hard work and dedication.
Simon Codery – 5 years
Simon McMonagle – 5 years
Alice Watts – 10 years
Clinton Mackenzie – 10 years
Dan Mack – 15 years
Lynell Roberts – 25 years
Tim Beale – 30 years
Gerard Wells – 25 years