Composition, Structure, Evolution and Formation of Hydrocarbons in the Earth Crust of Lesser Caucasus

By

Albert Harutyunyan¹, Stepan Abovyan², Gegam Babayan³, Artashes Barseghyan³, Artur Soghomonyan³

(1) State Engineering University of Armenia (SEUA), Yerevan, Armenia (2) Institute of Geological Sciences, Yerevan, Armenia (3) Laboratory of Experimental Seismotectonics of the State Engineering University of Armenia (SEUA), Armenia

 Based on laboratory and numerous geological and geophysical data, we suggest petrophysical section and the model of evolution of Earth crust and formation of fluids and hydrocarbon components.

By us at formation of structures and different processes definite part play serpentinized layer. This layer was “districted” partially, intruded on deep faults, suffered dehydration, partially preserved in the form of lens- shaped structures on the foot of the Earth Crust.

As a result of dehydration of the mentioned rocks are secreted fluids and gases, containing hydrocarbon components, which migrate to higher horizons of the Earth Crust and are accumulated in the rocks possessing collector properties.

Other source of fluids and gases are considered metamophized layer, which is represented by limestones, marbles, graphitizited schists etc, from which take place squeezing out of organic substances.

We suppose that the territory of Lesser Caucasus the part of marginal sea of Tethys ocean.

According to our notions low velocity layers on the depth of 5-13km,are formatted as a result of accumulated fluids, gases and hydrocarbons, most perspective oil-gas-bearing structures at the territory of Armenia.