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AAPG GEO 2010 Middle East
Geoscience Conference & Exhibition
Innovative Geoscience Solutions – Meeting Hydrocarbon Demand in Changing Times
March 7-10, 2010 – Manama, Bahrain

Using Spectral Attributes to Detect Seismic Tremor Previous HitSourcesNext Hit - A Synthetic Study

Marc Lambert1; Erik H. Saenger1; Stefan M. Schmalholz1

(1) ETH Zurich, Zurich, Switzerland.

A method is presented to detect subsurface seismic tremor Previous HitsourcesNext Hit by analyzing surface data. Spectral attributes of the recorded seismic wave-field at low Previous HitfrequenciesNext Hit are used to map the surface projection of the Previous HitsourcesNext Hit. We illustrate the concept on a synthetic data-set generated with a homogenous forward model and show how spectral attributes can be used for detecting locations of seismic tremor Previous HitsourcesNext Hit. In a second part we apply the method to an example of hydrocarbon reservoir related tremors. The results show that increased complexity of the subsurface seismic properties and/or the presence of several tremor Previous HitsourcesNext Hit can strongly complicate the interpretation. In addition, the presence of Previous HitdominantNext Hit surface noise may mask the signals emitted by the subsurface tremor Previous HitsourcesTop and make it impossible to detect them at the surface without additional processing. F-K filtering is successfully applied to noise-contaminated data and retrieves masked anomalies. Care has to be taken for using a proper data-set and proper processing parameters in order to avoid artifacts introduced by the F-K filter. Although we discuss an application for possible hydrocarbon reservoir related tremors, we believe that the methods can also be applied to any other type of seismic tremor signal.