Hydrocarbon Preservation Conditions in the Productive Series

Vertical migration from the pools to the surface is controlled by the pool’s hypsometric position, bythe density of tectonic fractures and joints developed in its overlying deposits, and by the presence of mud volcanic vents andtheir activity. The presence of numerous fractures, mainly formed after oil and gas pool formation and seismicity, might providesignificant evidence illustrating the increased probability of failure in the integrity of fluids that stop sealing up the oil reservoir.After all, they may lead to the reformation and even destruction of HC accumulation. Pieces of evidence of reformation anddestruction of the subsurface hydrocarbon accumulations are industrial petroleum content in young deposits (lying above themain basin reservoir) and wide development at the earth’s surface macro- and micro-seepages.