Density modeling of the basement of sedimentary sequences and prediction of oil-gas accumulation: Evidence from South SakhAlin and West Siberia

V. I. Isaev, R. Yu Gulenok, O. S. Isaeva, Galina Anatolievna Lobova

Research output: Contribution to journalArticle

3 Citations (Scopus)


The zones of deconsolidation and consolidation in the lower parts of the sedimentary cover and in the basement are considered as an important exploration indicator of oil-gas accumulation zones. The described zones are mapped using geodensity modeling (in a gravity field) in the MZ-PZ basement and Cretaceous deposits of South Sakhalin, as well as in the pre-Jurassic basement and plate complex of the central part of West Siberia. It was found that the most promising zones are confined to the Central Sakhalin Fault and Krasnoleninsk arch in Sakhalin and to the Visim megaswell in the West Siberian plate. Recent prospecting drilling revealed that deconsolidation zones are correlated with hydrocarbon reservoirs. The presented technique of geodensity modeling can be applied for petroleum-geological explorations of structures formed in different geological and tectonic settings.

Original languageEnglish
Pages (from-to)191-204
Number of pages14
JournalRussian Journal of Pacific Geology
Issue number3
Publication statusPublished - Jun 2008



  • Geodensity modeling
  • South Sakhalin
  • West Siberia
  • Zones of basement deconsolidation
  • Zones of oil-gas accumulation

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology
  • Geophysics
  • Oceanography
  • Palaeontology
  • Stratigraphy

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