Capacitive and migration parameters of the rocks of the upper part of the section in the east of the Russian platform

Abstract

This paper deals with values of the filtration coefficients of reservoir rocks that contain fresh undergroundwater, and changes in these values in space in the oil region of Tatarstan Republic. The article also considers the filtration coefficients and diffusion coefficients of Quaternary clay loams and the absorption capacity of low permeable formations in the Nizhnekamskaya petrochemical industrial zone; this zone is one of the largest in Europe. The main result of our research is that five key factors control the significant variability of rock permeability. These factors are the depth of the rocks, the geomorphological and structural location, facies formation conditions and location of the Neogene palaeovalleys. Low permeable rocks in the upper section of the Nizhnekamskaya industrial zone are widespread and have a high absorption capacity, which is almost similar to the capacity of montmorillonite; these factors determine the high protection of groundwater from surface pollution. The results obtained by the authors are necessary for rational hydrogeological and geoecological studies, as well as for the creation of computer geofiltration and geomigration models.