QUANTITATIVE FORECAST OF RESERVOIR PROPERTIES OF THE GYDANSKAYA AND WESTERN PART OF YENISEI-KHATANGA OIL AND GAS BEARING AREAS
Quantitative prediction of storage properties of Jurassic and Cretaceous reservoir rocks of the Gydanskaya and western part of the Yenisei-Khatanga oil-and-gas areas obtained by using the technology of combined spectrum-velocity prediction is presented in the article. The physical basis of this technology, its description and the process chart are also presented. Within the scope of this article the use of the technology of combined spectral and velocity prediction for seven reservoirs in the Jurassic - Cretaceous section of the study area is considered. Permeability properties of reservoir rocks of the Gydanskaya and western part of the Yenisei-Khatanga oil-and-gas areas are obtained in the form of prediction maps and cubes of effective thicknesses and specific permeability properties of reservoir rocks. Comparison between the cube sections and prediction maps of effective thickness of respective section intervals is also shown. The obtained cube of effective thicknesses can be used in the 3D statistical model for basin modeling and resources calculation by volumetric method. Based on all the maps obtained the quantitative assessment of hydrocarbon potential has been updated for the western part of the Yenisei-Khatanga regional deep. The obtained prediction maps and cubes of permeability properties allowed for essentially updating of the prediction parameter (Hef) for determination of the analogy factor between the specified calculated and reference blocks when assessing resources potential by the internal geological analogy method.