b'Seismic window Seismic windowIquickly identified four more channelstraining sets for application in a machine by using different seed points and alearning approach applied to classify picture emerged of a series of west-eastthe facies in an entire volume\x08 A more trending channels with associated fansdetailed explanation can be found in (Figure 2)\x08 This is where I stopped, butFirst Break Vol 19, March 2021 Seismic the webinar continued and got veryclassification: A thalweg tracking/interesting\x08 By identifying various faciesmachine learning approach by Paul de as channels, splays, fans the thalwegGroot et al (2021)\x08 Take a look, its worth tracker can be used to produce labelledreading\x08Michael Micenko Associate Editor for Petroleum mick@freogeos.com.auTracking geological featuresLast week I watched a late night webinar (why are they always late at night?) which described using a thalweg tracker toFigure 1.South West Queensland example of a body comprising 50 000 cells tracked from a single seed map geological bodies in a 3D seismicpoint by the thalweg tracker (top). Environment of Deposition map (bottom) is interpreted from picked objects.data volume\x08 Originally designed to follow the thalweg of a channelhere the thalweg is defined as the deepest / lowest part of a channel - the tracker searches for the lowest point in neighbouring cells given a single seed point on an elevation map\x08 The thalweg tracker will also work with seismic amplitude or several other seismic attributes as an input, and because the interpreter can select how many points are picked some control can be exercised to limit any picked bodies to a particular facies\x08Some properties of the thalweg tracker are:The result is almost independent of seed location\x08 If it is in the same channel an almost identical result is obtainedIt tracks only positive amplitudes or negative amplitudes so it is always in either a peak or troughIt is not restricted to tracking thalwegs\x08 Other geological features can also be trackedThe input can be any seismic attribute but amplitude is a good starting pointThe examples shown in the webinar were impressive so I thought Id give some Australian data a try\x08 Initial results using an offshore dataset were poor, so I switched to using some SW Queensland data as input and the results were much more useful\x08 The tracker produced an interesting channel feature that terminated in a fan and there were also some splay like features (Figure 1)\x08Figure 2.Several bodies are picked across the area of interest, each with its own seed point.APRIL 2021 PREVIEW 32'