# permeability

## 3D model and numerical algorithm for gas filtration in porous media

The article presents a three-dimensional mathematical model of the gas filtration process in porous media and a numerical algorithm for solving the initial-boundary value problem.  The developed model is described using the nonlinear differential equation in partial derivatives with the appropriate initial and boundary conditions.  The proposed mathematical apparatus makes it possible to carry out hydrodynamic calculations taking into account changes in the main factors affecting the process under consideration: permeability, porosity, and thickness of layers, gas recovery coefficient, visc

## PECULIARITIES OF OBTAINING AND PROPERTIES OF COMBINED HYDROGEL MEMBRANES BASED ON POLYCOPROAMIDE AND POLYVINYLPYRROLIDONE COPOLYMERS

The research results of surface adsorption magnitude and tensile strength of combined polyamide-hydrogel membranes, depending on the content of the hydrogel lining membrane are presented in the article. It was found that the molecular weight variation of PVP, both in the structure of copolymer and in modifying blend, as well as the time of staying hydrogel film in the modifying solution allow to regulate the properties of combined membranes directly, in particular, its strength and permeability.

## INVESTIGATION OF BROADBAND OF SILICON-ORGANIC LIQUIDS IN MATERIALS FOR RECEIPT OF VERTICAL AND HORIZONTAL WATER ISOLATION OF WALLS

The article presents the results of the study of the permeability of liquids produced by ZDP “Kremniypolimer” and developed mixtures of water-soluble liquids for their use in restoring vertical and horizontal waterproofing of walls by surface impregnation, by pouring into pre-drilled holes and during waterproofing repair works due to wetting of walls. It is also possible to use these liquids for the surface treatment of walls to protect them at low capillary pressures, water or protection from the effects of rain or snow because of their hydrophobic with followed coating.

## Litho-petrophisical heterogeneity of the reservoir rocks

Based on the results of our studies, three litho-types of rocks have been identified, their structure characterized, influence of post-sedimentary transformations revealed, etc. Leaching, sulphatization and deposition of ore minerals are considered as the changes superimposed upon the background lithogenesis. The diversity of the processes has resulted in significant petrophysical heterogeheity of geological cross-section, which has to be taken into account during idevelopment of the layers, introduction of the intensive methods, etc.