Month: October 2013

Open PhD position in the Physical Acoustics Lab

Seismic methods are commonly used to characterize reservoirs of all kinds. Micro-seismic events are an example of remote sensing of the reservoir.
In previous research, we reported on the distinction of seismic events that were originally clustered based on their distinct P- and S-waves. This involved a correlation technique in the frequency domain. In this postgraduate research project, we are going to tackle the following questions:

  • What are there specific data requirements for the new spectral identification to work?
  • Are there particular wave modes (for example, head waves) responsible for characteristic power spectra?
  • Does an analysis in the time domain shed further light on separation of seismic events in “a cloud”?

Fees and a stipend are provided by the Physical Acoustics Lab, thanks to the generous support of the Schlumberger’s Gould Research Center, Cambridge, UK.

RUS

Resonance Ultrasound Spectroscopy (RUS) uses the normal modes of an oscillating body to determine its elastic parameters. It allows the complete tensor to
be determined from a single measurement.

It fits an experimental gap between low frequency stress-strain measurements and high frequency time of flight experiments and deals with frequencies at the high end of those relevant to geophysical applications. It is a nondestructive method that can be used on small, rare or hard to obtain samples.