Geology, geography and global energy

Scientific and Technical Journal

REFLECTION OF EXOTHERMIC REACTIONS OF HYDROCARBON FORMATION IN THE EARTH'S GEOTHERMAL FIELD

2021. №1, pp. 38-47

Navrotsky Oleg K. - Saratov National Research University named after N. G. Chernyshevsky, 83 Astrakhanskaya st., Saratov, 410012, Russian Federation

Zinchenko Ivan A. - JSC "NVNIIGG", 70 Moskovskaya, st. Saratov, 410012, Russian Federation

Merkulov Oleg I. - JSC "NVNIIGG", 70 Moskovskaya, st. Saratov, 410012, Russian Federation

Zotov Aleksey N. - LLC "Lukbeloil", 42 Ul’yanovskaya st., Saratov, 410056, Russian Federation

Prochukhan Konstantin Yu. - В«Gazpromneft - Technological PartnershipВ» LLC, St. Petersburg, Yakubovich street, 24 lit. A,Russian Federation

The heat of gravitational differentiation, radiogenic heat, accretion heat, heat of tidal friction, and rotational heat are natural factors that provide the modern geothermal field of the Earth. The first four sources are primarily evaluated. Exothermic reactions stand apart, which are explained either by the peculiarities of postsedimentary changes in sedimentary rocks, or by special hydrogeological conditions. It has been established that the formation of hydrocarbons refers to reactions of an exothermic nature, and the effect of the temperature increase is so strong that it changes the geothermal curve created by endogenous heat. The geothermal curve is locally convex. In this zone, hydrocarbons and its accumulation are formed. This process is shown on the example of an oil and gas field in reservoirs of the Bobrikov horizon in the northwestern framing of the Caspian Basin. Moreover, by detailing the step of temperature measurements in depth, the zone of oil - water contact is fixed. Geological and geochemical material gives reasons to detail the ideas about the organic theory of the genesis of oil and gas, in particular about the temperatures created by the sedimentary deposits themselves when they get into conditions of higher temperatures and pressures.

Key words: geothermal field, geothermal curve shapes, exothermic reactions, hydrocarbons, Caspian Basin, reservoirs of Bobrikov horizon, petroleum synthesis, accumulation, oil-water contact

Read