Key words: method of nuclear magnetic resonance (NMR), the phase transition, the crystallization of wax, paraffin oil saturation temperature, activation energy, wettability of the surface.
The article has investigated the effect of temperature on the pore space and the character of crystallization of waxes in the light of structural and lithological rock properties and composition of the oil fields as an example of the Perm region. Analysis of experimental data showed that the phase transition of paraffin in a restricted micro volume of reservoir rocks is observed at a temperature of 2-25 °C higher than the free volume. Significant role in the saturation temperature have physics-chemical characteristics of the pore surface. For carbonate reservoirs established a linear increase in the saturation temperature of paraffin oil with an increase in wettability of pore surfaces.
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