Sergo Ordzhonikidze Russian State University for Geological Prospecting, Moscow, Russia¹ ; Ministry of Science and Education of the Republic of Azerbaijan, Institute of Oil and Gas, Baku, Azerbaijan²

Kerimov V. Yu., Head of Department¹, Leading Researcher², Doctor of Geological Sciences, kerimovvy@mgri.ru

Sergo Ordzhonikidze Russian State University for Geological Prospecting, Moscow, Russia

Mustaev R. N., Associate Professor, Candidate of Geological Sciences
Serikova U. S., Associate Professor, Doctor of Engineering Sciences
Ronamov P. A., Lecturer

The implemented 3D modeling of hydrocarbon systems in the South Caspian Basin (SCB) identified the mechanisms of hydrocarbon migration: mud volcanoes and extensional fractures related to diapiric structures are the primary migration pathways. Nearly all deposits in SCB occur in the mud volcanism areas and are complicated by eruptive channels, which implies vertical migration of hydrocarbons. The modeling also indicates that the critical moment and migration of hydrocarbons from the Eocene, Maikop and Diatomaceous oil and gas source rocks (OGSR) comes by the end of the Surakhany time (~3 million years ago), i.e. during formation of the upper portion of the productive series. In the Tarkhan–Chokrak OGSR strata, the critical moment was only passed by at the end of the Akchagyl time (2.2 million years ago). Modeling of hydrocarbon systems identified the oil and gas concentration zones (or accumulation zones) in the productive series. The analysis and typification of hydrocarbon traps and reservoirs in the South Caspian Basin shows that the totality of characteristics, which point at belonging of a deposit in a certain class, relate with one of two factors—structure or sedimentation (lithology–stratigraphy).

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