PMDI subsystem enabled to locate upper Jurassic traps and analyze prospects for middle and lower Jurassic formations. Interpretation of  the section was part of a project which should provide exploration drilling decisions.

The seismic section used was shot and processed in 1988. In the section, the Upper Jurassic Vasyugan formation corresponds only to one half of the seismic wave period from 2000 to 2050 ms at CDP 80. The sampling interval was 4 ms, and was considered not enough for stratification of Vasyugan formation. Tracing of Tyumen layers (from 2050 to 2150 ms at CDP 80) could hardly be done with the initial seismic section since a lot of faults affected the horizons.

In the next figure you can see the result of section classification into 11 classes with the Classification program. Instant amplitudes, frequencies and phases together with coherent filtering results and low frequency component of the initial section, formed the best Multi-D attributes used for the classification.