Key words: residual hydrocarbon saturation, direct-flow capillary imbibition, dynamic porosity.
The authors describe conception of structure-trapped volumes in oil-and-gas saturated rock pore space, forming due to big ratio (>>1) of pore and capillaries sections. An experimental method of structure-trapped oil-and-gas saturation index and dynamic porosity index measuring is brought in the article. Proposed method is found on direct-flow capillary imbibition phenomenon using proprietary laboratory facility. Filling field geological model with measured parameters (residual structure-trapped hydrocarbon saturation, dynamic porosity, and direct-flow capillary imbibition speed) will give a possibility to allocate the most attractive zones with big residual structure-trapped reserves, correct hydrodynamic model and make a choice of production technologies in allocated zones on a case-by-case basis.
