... main part of pores (up to 75%) of the rocks in question is of subcapillary sizes making fluid movement practically impossible. At that, rock lithology affects the voids structure significantly. Thus, reservoirs with different content of the amorphous silica have different effective gas-filled porosity. Quantitate evaluation of the part of the differently sized pores among the voids in common is a lithological-capacitive model of the voids structure allowing describing these differences and forecasting ...

... data received with volumetric and static analyzer of specific surface area and porosity of the samples. It has been found that fracture capacity amounts to 1/30 of total porosity, and flow channels are sized to a nanoscale, which depends on the form of silica prevailing in the formation. Materials and methods sThe following core analysis techniques have been applied and reviewed in order to solve the current problem: X-ray diffraction (XRD), thin section description, core microtomography, mercury porosimetry....

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