The work is devoted to the construction of a three-dimensional density model of the territory, which would not contradict the information obtained by other methods (drilling, seismic, etc.). A generalized scheme for constructing such a model is given, its stages and ways of matching with the results of other methods are described. The technology described in the work is based on the tools included in the GIS INTEGRO software package (FSBI «VNIGNI»). The article is illustrated with examples of the technology application in the construction of density models for various parts of the Volga-Ural oil and gas province.

Spiridonov Viktor Albertovich, Candidate of Technical Sciences, Head of Sector of computer technologies for 3D modeling of geological and geophysical objects, Division of Geoinformatics, FSBI «All-Russian Research Geological Oil Institute». 8 Varshavskoye sh., Moscow, 117105, Russia. E-mail: victor@geosys.ru.

Pimanova Nadezhda Nikolaevna, Candidate of Technical Sciences, Leading Researcher, Division of Geoinforma-tics, FSBI «All-Russian Research Geological Oil Institute». 8 Varshavskoye sh., Moscow, 117105, Russia. E-mail:nadja@geosys.ru.

Finkelstein Michail Yankelevich, Doctor of Technical Sciences, Head of Department for 3D modelling of oil-and-gas bearing features, Division of Geoinformatics, FSBI «All-Russian Research Geological Oil Institute». 8 Varshavskoye sh., Moscow, 117105, Russia. E-mail: misha@geosys.ru.

1. Atlas «Reference geological and geophysical profiles of Russia». Deep seismic sections based on GSS profiles worked out in the period from 1972 to 1995. Electronic edition. St. Petersburg : VSEGEI, 2013. URL: http://www.vsegei.ru/ru/info/seismic/.
2. Glaznev V.N. Complex Geophysical Models of the Fennoscandian Lithosphere. Apatity : KaeM Publishing House, 2003. 252 p.
3. Glaznev V.N., Mints M.V., Muravina O.M. Density modeling of the Earth crust for the Central part of the East-European platform // Bulletin of Kamchatka Regional Association «Educational-Scientific Center». Earth Sciences. 2016. No. 1 (29). P. 53-63.
4. Druzhinin B.C., Martyshko P.S., Nachapkin N.I., Osipov V.Yu. The structure of the upper part of the lithosphere and petroleum potential of the Ural region’s interior. Yekaterinburg : Iinstitute of Geophysics Urals Branch of RAS Publ., 2014. 226 p.
5. Zastronova O.I., Krotova-Putintseva A.E., Lukyanova N.V., Kirikov V.P. et al. State geological map of the Russian Federation. The scale of 1:1 000 000 (third generation). Series Central European. Sheet O-37 – Yaroslavl. Explanatory note. St. Petersburg : Map factory VSEGEI, 2016. 408 p.
6. Karsakov L.P., Zhao Chunjing, Goroshko M.V. Tectonics, deep structure and metallogeny of the Central Asian-Pacific belts junction area : Explanatory note to the Tectonic map scale of 1:1 500 000. Vladivostok ; Khabarovsk : DVO RAS, 2005. 264 p.
7. Kobrunov A.I., Varfolomeev V.A. On a method of ε-equivalent redistributions and its use in the interpretation of gravitational fields // Physics of the Solid Earth. 1981. No. 10. P. 25-44.
8. Martyshko P.S., Ladovskiy I.V., Kolmogorova V.V., Tsidaev A.G., Byzov D.D. Grid functions technique for 3D seismic-gravity model construction // Ural Geophysical Bulletin. 2012. No. 1 (19). P. 30-34.
9. Mitsyn S.V. On numeric implementation of spectral method of gravimetry inverse problem // Geoinformatika. 2018. No. 3. P. 89-97.
10. Pavlenkova N.I. Rheological properties of the upper mantle of Northern Eurasia and the nature of regional boundaries based on ultra-long seismic profiles // Russian Geology and Geophysics. 2011. V. 52, No. 9. P. 1016-1027.
11. Pimanova N.N., Biserkin I.A., Deev K.V. Technology of 3D mesh density models in GIS-environment INTEGRO // Geoinformatika. 2013. No. 4. P. 45-48.
12. Priezgev I.I. Construction of distributions of physical parameters of the environment based on gravity, magnetometry, and seismic data // The Russian Geophysics Journal. 2005. Issue 3. P. 46-51.
13. Strahov V.N. Geophysics and mathematics. Moscow : OIFZ RAS, 1999. 64 p.
14. Surkov V.S., Varlamov A.I., Efimov A.S., Grishin M.P., Kuznecov V.L., Staroselcev V.S., Lotyshev V.I., Smirnov L.V. Consolidated crust of platform regions of Siberia // Prospecting and Conservation of Mineral Resources. 2007. No. 8. P. 3-9.
15. Fedorova N.V., Kolmogorova V.V., Ladovskiy I.V. Geophysical models of the earth’s crust structure based on the Krasnoleninsky profile // Ural Geophysical Bulletin. 2010. No. 1 (16). P. 59-68.
16. Fotiadi E.E., Zaharova T.L., Ladinin S.A., Tychkov S.A., Sharlovskaya l.A. Main features of the structure and dynamics of the Siberian lithosphere based on geological and geophysical data. Novosibirsk : Science, Siberian branch, 1990. Issue 738. 116 p.
17. Shevchenko B.F., Popeko L.I., Didenko A.N. Tectonics and evolution of the lithosphere of the eastern fragment of the Mongol-Okhotsk orogenic belt // Geodynamics & Tectonophysics. 2014. V. 5, Issue 3. P. 667-682.
18. Gardner G.H.F., Gardner L.W., Gregory A.R. Formation velocity and density – the diagnostic basics for stratigraphic traps // Geophysics. 1974. V. 39, Issue 6. P. 770-780.