Hydrocarbon related microtremors: Verification of an analytical oscillator model by numerical solutions of the Navier-Stokes equations
Published at
EAGE 69th Conference & Exhibition, London, UK
Publication date
11 June 2007
Abstract
The presence of hydrocarbon reservoirs has been observed to cause characteristic low frequency seismic signals. A possible explanation is the excitation of oscillations of the hydrocarbon filled pores of the reservoir rock. Synthetic spectra of the ab initio Navier-Stokes equations and of a basic linear one-dimensional oscillators show comparable characteristic features of measured spectra when oceanic background waves around 0.1 - 0.2Hz are assumed to be the external driving force. Resonance frequency and damping constant of the linear oscillator are shown to be representative of the realistic and rather complex and nonlinear liquid dynamics described by the Navier-Stokes equations.
