MODERN OF MIGRATION GAS IN MARGINAL FLEXURES THE DOBRUDZHІ

Abstract

Modern gas migration territorially coincides with discontinuous disturbances in the sedimentary cover and deposits of combustible fossils in previous epochs of sediment accumulation. The geodynamics of the region determined the stages of its formation, accompanied by platform transformations and tectonic-magmatic processes, as well as the formation of sedimentary complexes with shale, coal seams and oil and gas reservoirs. Vertical, relatively disturbed, and lateral, intraplate migration of hydrocarbons were the main factors in the formation of deposits in the region. The presence of discontinuities and stratigraphic unconformities in the deposits of the Pre-Dobrudzh trough and near them is regarded as a key factor in the low conservation of most of the paleo-reservoirs of these deposits. All samples contain an insignificant amount of hydrogen and C6 hydrocarbons, which indicates modern gas migrations to the Earth's surface, mainly in the zones of faults.