A method for determining sedimentary facies using 3D seismic data

摘要

The present invention describes a method for adaptively determining a plurality of sedimentary facies from 3D seismic data, comprising the steps of (a) generating an attribute volume 106 comprising at least one attribute from said 3D seismic data; (b) generating at least one frequency decomposition colour blend volume 104 from said 3D seismic data; (c) generating a data volume 108 comprising at least one geological object utilising data from said attribute volume and said frequency decomposition colour blend volume; (d) generating a facies classification model dataset 300 for a predetermined region of interest of said 3D seismic data applying a probabilistic algorithm and utilizing data from said geobody volume and said frequency decomposition colour blend volume; (e) selectively adjusting at least one first model parameter, so as to optimise said facies classification model dataset in accordancewith a conceptual geological model; and (f) selectively providing said facies classification model dataset in a representative property model of said region of interest of said 3D seismic data. The attribute volume may be an edge detection volume. To optimise the facies classification dataset, an acceptance threshold and facies count may be adjusted by the user.