“GEOVISOR” PREDICTION TECHNOLOGY OF OIL AND GAS POTENTIAL
BASED ON INTEGRATED GEOPHYSICAL DATA

 “GeoVisor” computer  technology is designed for the integrated interpretation of geological-geophysical data in a common information medium – time seismic section plane. The technology is a finished tool for creating a consistent physical-geological models (PGM) of medium under study and includes all stages of interpretation starting from the input of field data to prediction of oil and gas potential  and delineation of a supposed hydrocarbon deposit. 

  “GeoVisor” technology is unparallel in Russia and overseas. It has been widely tested experimentally and in practice in the course of both regional and exploratory stages of geological prospecting in different oil and gas-bearing regions of Russia. Combining  data acquired with different geophysical methods in a single coordinate space (seismic time section plane) secures:

• determination of uniform  seismic geoelectrical complexes with different physical parameters based on electrical seismic stratigraphy (Figs 1, 2);

• calculation of in-line resistances and interval velocities (based on the inversion of seismic signals) within coeval sequences of deposits (Fig. 3) and determination of porosity factor (PF) values reflecting the changes in the nature of fluid saturation of the section (Fig. 4);

• observation of the changes in thickness and lateral alteration of lithological section of uniform seismic geoelectrical sequences in crosswell space (Fig. 3);

• classification of PF anomalies with respect to the degree of coincidence (using Ex-electrical and Hz-magnetic components) and phase parameter of induced polarization (IP) enables to detect oil-gas promising intervals with a type of supposed trap and spatial position of hydrocarbon deposit at any stratigraphic level.

At present the reliability of our prediction makes up 75-85%.