The effect of high-frequency and magnetic fields on the associative nature of petroleum-containing systems was examined. Data were obtained on the change in the supramolecular structure and mobility of the petroleum part of the stratum while preserving the crystal system of the crystalline part under a high-frequency effect. The associative character of the physical and chemical reactions between the ingredients of the surface layers of associates in complex liquid-phase systems is confirmed, and in our opinion, this indicates the presence of a common constituent in them - gravitation. Key words: associativity, petroleum-containing systems, waveprocesses, instrumental methods of analysis.