Gryn D. Method for determining the fault-block structure of the geological environment according to seismic data.

The dissertation is performed in order to create a high-resolution method for determining the fault block structure of the geological environment. It uses the frequency attenuation of the seismic wavesenergy that pass through the underground objects. The method allows detecting the spatial pattern in the attenuating properties of seismic waves, which are associated with the presence of geological bodies. The different physical properties of geological structures in space make it possible to trace their spatial identity and structural differences, which manifest themselves in the form of three types of objects: monolithic bodies; fault structures; and aggregate, which take the form of surrounding objects. That is, it is about creating an object-oriented method where physical properties play a secondary role. The results of the interpretation of seismic data are often far from the true geological depth structure, as they present the result in the form of physical properties of the geological environment. In recent decades “fracture-free and block-free sections” have become commonplace, and an attempt is made to explain complex regional geodynamic movements based on them. Different physical models of the same area often have significant inconsistencies that need further explanation. The developed method was applied in: fractured block structure of the Donetsk folded region and adjacent territories; the thin-layer coal-bearing environment of the mine field of the Krasnolimanska mine; and several prospecting profiles on the Zmeyny (Snake) Island. The differences between the DOBRE-99 velocity model and the CDP DOBREflection2000 kinematic velocity model were analyzed, and the reasons for the differences were explained. Key words: absorption, energy attenuation, difference method, deep seismic sounding, dissipative properties, basic functions, spectral region, Moho boundary, tectonic fauls.