DYNAMICS OF C<sub>6</sub>-C<sub>8</sub>, AROMATIC HYDROCARBON CONCENTRATION IN NEAR SURFACE MEDIUM DUE TO DIRECT GEOLOGICAL AND CHEMICAL PROSPECTING FOR ОIL. DEPOSITS
Long-term geochemical studies allow to find dependence of hydrocarbons concentration indicators in near surface medium from natural and technogenic factors which are not associated with oil deposits. Concentrations of aromatic hydrocarbons in a snow-cover, bottom sediments of lakes and rivers, subsoil clays are considered according to fluctuations of medium temperature and its water saturation. This analysis results in revealing methodical recommendations on conducting of field works and of data processing. The fact of intensification of hydrocarbon migration to daytime surface during seismic impact on geological medium is experimentally established. This dependence serves the basis for methodology of ground variational measurements of hydrocarbons, registering increase of near surface hydrocarbon concentrations under impact on geological medium during seismic survey and well drilling