Application of geochemical methods for direct prediction of hydrocarbon deposits in Western Yakutia

   Based on the materials previously carried out by various types of geochemical surveys (water-gas, hydrochemical, litho-gas-geochemical, snow, atmochemical, bituminological sampling), an analysis of the oil and gas potential prospects of the eastern part of the Siberian platform within the Sakha Republic (Yakutia) established a direct relationship between the anomalies and the proven oil and gas potential of the studied territories. The indicators of geochemical field anomalies are an order of magnitude higher within territories with proven oil and gas potential (Nepa-Botuobinskaya anteclise) than in the territories where they are absent, including oil and gas fields that have been discovered to date (Syugdzherskaya structural low). A striking example is the geochemical research carried out within the Chayanda oil and gas condensate field, where the confirmation of deposits by drilling, using geochemical data, increased by 30 %, which indicates the validity of the use of geochemical analysis methods in the search for oil and gas. Based on the analysis of the data presented, when predicting and searching for hydrocarbon accumulations, the most rational approach is to carry out mandatory advanced zoning of large territories according to the level of geochemical background.

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