Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

TU Delft proves that seismic noise measurements work in practice

27.02.2007
Background noise from the earth can provide a wealth of information about the earth's crust, which for example can then be used when searching for new oil fields. Researchers from TU Delft have tested this relatively new discovery in a desert in the Middle East.

The seismic noise measurements have shown that the theory also works in practice. An article by PhD candidate Deyan Draganov about this research subject has been published in Geophysical Research Letters.

When acoustic noise travels through a medium, such as the earth's crust, it compiles information. Ground microphones, in conjunction with a few simple mathematical processes (cross-correlation), can extract a meaningful signal from the earth's seismic noise. This relatively new method is called 'seismic interferometry'. For researchers, the great advantage of using existing seismic noise is that signals only need to be registered and not produced (with for example vibrating plates, explosives or microwaves).

Theory

Geophysicists Kees Wapenaar and Evert Slob of TU Delft, and Roel Snieder of the Colorado School of Mines, have recently generalised the underlying theory of seismic interferometry and demonstrated that the seismic noise can now be applied to a much wider scale of physical applications than was previously thought. Among the applications to which the theory can be applied is the process of searching for new oil and gas fields.

Practice

The TU Delft researchers, in partnership with Shell, have now tested their method. The noise measurements - recorded in a desert in the Middle East - have shown that the theory also works in practice. An article by PhD candidate Deyan Draganov about this research subject has been published in Geophysical Research Letters (22nd February).

Expert

Draganov has been involved in the development of seismic interferometry from the beginning and has made especially important contributions towards proving that the method is suitable for extracting reflection-data from the seismic noise (other researchers in this field focus primarily on surface area sound waves).

Draganov, who will graduate later this year, is now regarded by the geophysical world as one of the experts in this field of research. His work is also regarded as particularly important for the LOFAR-project, but Shell is also extremely interested in applying this method to the search for new oil and gas fields.

Roy Meijer | alfa
Further information:
http://www.tudelft.nl
http://www.tudelft.nl/live/pagina.jsp?id=0bfb6afb-db16-4fd9-99bb-242890f3fd25&lang=en

More articles from Earth Sciences:

nachricht Predicting unpredictability: Information theory offers new way to read ice cores
07.12.2016 | Santa Fe Institute

nachricht Sea ice hit record lows in November
07.12.2016 | University of Colorado at Boulder

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Will Earth still exist 5 billion years from now?

08.12.2016 | Physics and Astronomy

Oxygen can wake up dormant bacteria for antibiotic attacks

08.12.2016 | Health and Medicine

Newly discovered bacteria-binding protein in the intestine

08.12.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>