Methods of analyzing seismic data

A method of analysing seismic data from a geological volume divided into a plurality of voxels, for each voxel a respective neighbourhood being defined that includes that voxel and a predetermined arrangement of neighbouring voxels, the method including the steps of:

• calculating, for each voxel, the respective normal vectors of a seismic attribute vector field derived from the seismic data;
• calculating, for each voxel, a respective local structure tensor based on the normal vectors of the voxels of the respective neighbourhood;
• displaying a barycentric map having vertices corresponding to different anisotropy shape metrics of the eigenvalues of the respective local structure tensor;
• calculating, for each voxel, the values of the anisotropy shape metrics for the eigenvalues of that voxel, such that each voxel has a corresponding location on the map;
• and
• showing a population density distribution of the corresponding locations of the voxels on the map.