There is a lot of evidence that shales can be highly anisotropic (Vertical Transverse Isotropy). We account for the effects when processing seismic data. We adjust sonic log data drilled in deviated wells before well tie and low frequency model building. But normally we don’t invert for anisotropy. Why is this so? Is it alright to ignore anisotropy when running seismic inversion? If not, what are the implications? Can we actually invert for anisotropy?
This webinar will explore the implications of ignoring anisotropy during inversion and show that on occasions this can have a significant impact on reservoir characterisation, for example, by predicting the wrong fluid in a reservoir rock. We will also review the ways in which to include anisotropy in seismic inversion and describe the limitations.