Abstract
The physicochemical properties of surface deposits during interaction with a direct electric current are analyzed in this paper. The dependence of the concen� tration of mobile forms of microelements on redox characteristics before and after electric treatment is studied. Violation of the physicochemical equilibrium (redox potential Eh and concentration of hydrogen ions pH) is one of the main factors of the appearance and existence of epigenetic alterations of rocks above oil and gas deposits. Superposed aureoles of heavy metals formed in this process are studied by geoelec� trochemical methods of hydrocarbon (HC) deposit prediction. The discovery of anomalously high concentrations of mobile forms of microelements above contours of some HC deposits was the main result of the previous investigations of surface deposits overlying oil and gas deposits [1]. However, special attention was not paid to the study of the distribution of physicochemical parameters, whereas their evolution during the inter� action with a direct electric current during prospecting works on oil and gas was not discussed at all. Because of this, the author decided to estimate the influence of direct current on the evolution of pH and Eh in rocks overlying HC deposits. The samples were collected
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