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Estimation of Fluid Mobility from Frequency Dependent Azimuthal AVO - A Synthetic Model Study
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Azimuthal amplitude-versus-offset (AVOZ) data can contain abundant information on fracture properties, lithology and fluid saturation, but procedures for interpretation in terms of such properties remain relatively poorly developed, particularly considering the frequency dependent content. In our numerical model, we developed recently developed rock physics model based inverse schemes with a particular emphasis on accounting for the frequency-dependence of anisotropy, which is believed to be important in fractured reservoirs. Frequency-dependent anisotropy is expected to be influenced by fluid mobility, and determining this parameter from seismic data would be advantageous. In this paper we build a frequency dependent anisotropic synthetic model and show the variations of AVO response due to frequency effects. We present a new method to analyse the synthetic waveform data, and demonstrate that it is capable of detecting variations in fluid mobility. Further testing and application to field data are planned.