A method for predicting the state of a geological formation. The method may include
generating a separation key effective to extract a first feature from a signal
or signals corresponding to a first state and a second feature, distinct from the
first feature, from a signal or signals corresponding to a second state. The separation
key may list at least one feature operator and a weighting table. The at least
one feature operator may expand a test signal collected from a geological formation
of unknown state in at least one of frequency space and time space to generate
a plurality of feature segments. A weighting table may weight the plurality of
feature segments. The weighted plurality of feature segments may be superimposed
to form a third feature. The geological formation may be classified as having one
of the first state and second state based on the correspondence of the third feature
to one of the first feature and second feature.
