Biogeochemical indicators, anomalies and their oil-geological significance (Tunguska basin)

Abstract

Hydro-biogeochemical studies were carried out in the west of the Siberian platform in the basin of the river Podkamennaya Tunguska, where 1204 groundwater sources and watercourses were studied in terms of biogeochemical indicators. The most informative indicators have been established - bacteria that oxidize propane, butane, pentane, benzene, toluene. According to these parameters and total biogenicity, 42 anomalies with areas of 10-200 km² were identified. In structural and tectonic terms, 20 biogeochemical anomalies are confined to local positive structures, which can be considered promising for oil and gas exploration.