CDP DATA STRUCTURAL INTERPRETATION IN COMPLEX SEISMIC CONDITIONS OF EAST SIBERIA

N. V. Trufanova, E. V. Temenyova, I. P. Strelchenko, V. A. Zaravnyaev

On considering methodical and technological approaches to the CDP data structural interpretation in seismic conditions of East Siberia an approach improving the standard technique by means of a wide complex of a priori information, namely results of geological and seismotomographic studies of the shallow subsurface (SS), magnetic and gravity data interpretation in evaluating velocity parameters and target reflecting horizon depths, evidence from drilling, borehole seismics and logging is presented. The authors implement the GeoDepth (Paradigm) technology. It includes procedures of radial and wave-equation migration and allows to take into account a priori medium characteristics in the traveltime interpretation of seismic data. Using the results of integrated interpretation of seismic tomography, geological and magnetic survey, they optimized SS boundaries and built a geotectonic skeleton frame (Solid Model, GeoDepth, Paradigm) which was “filled up” with interval velocities later on. The efficiency of SS arameterization with regard to the tectonic structure of the area was evaluated by depth and time migration results. In the reconstruction of a subsalt complex within the frame of a block model structural imaging the errors were halved and depth summation quality was improved.

Key words: CDP survey, structural seismology, seismic tomography, geotectonic skeleton frame, combinations of geophysical methods.

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