OOO Neftegazgeofizika

Ul’yanovka, Russia

OOO Neftegazgeofizika

Ul’yanovka, Russia
SEARCH FILTERS
Time filter
Source Type

Murtsovkin V.A.,OOO Neftegazgeofizika
Colloid Journal | Year: 2013

Relations are derived for calculating the electrical conductivity of porous media with two-phase saturation. The considered calculations are based on a capillary-lattice model of a porous medium, the model being composed of several unequally scaled three-dimensional cubic lattices of capillaries. Each lattice may be represented as a large number of analogous cubic cells with the same structure of pore space and a preset pore size distribution over the cells. The distribution of porosity over pore sizes serves as a starting datum for the calculation of all model parameters. The number and scale of lattices are determined by the peculiarities of this distribution. The possibilities of practical use of the considered model are shown by the example of experimental data on samples of porous rocks. The results obtained, in particular, suggest that the model is applicable to solving problems of applied geophysics relevant to determining the saturation of rocks with water and hydrocarbons. © 2013 Pleiades Publishing, Ltd.


Bolotov A.N.,Tver State Technical University | Strel'nikov Y.A.,OOO Neftegazgeofizika
Journal of Friction and Wear | Year: 2012

Experiments are carried out to determine the molecular and mechanical components of the specific friction force under the effect of hydrostatic pressure of up to 140 MPa. The molecular component of the friction coefficient declines by up to two times under the effect of the hydrostatic pressure in various fluids. It is found that the combined influence of the temperature and hydrostatic pressure on the mechanical properties and the contact pressure leads to considerable variations in the deformation component of the static friction coefficient in plastic contact at temperatures of up to 200°C and under pressures of up to 140 MPa. The dependence of the hardness of structural materials on the hydrostatic pressure is analyzed to predict the effect of the latter on the deformation component of friction. It is shown that with increasing pressure within the above range the hardness grows in proportion to the square of the pressure and is inversely proportional to the initial hardness. The formula for calculating the dependence of the indentation depth of a spherical indenter in elastic contact on the hydrostatic pressure is derived. © 2012 Allerton Press, Inc.


Murtsovkin V.A.,OOO Neftegazgeofizika
Colloid Journal | Year: 2014

Results of simulation of electrical-conduction and filtration processes in porous media have been reported. For better visualization and simplification of the analysis of the results obtained, simple model distributions of pore sizes with the patterns of a triangle, rectangle, semiellipse, etc., have been used. The porous medium has been simulated in terms of a capillary lattice model, which represents a three dimensional cubic lattice of capillaries the sizes and number of which are selected according to a preset pore size distribution. The data obtained reflect the general regularities of the influence of the pore structure on the transfer processes, show the interrelation between the parameters characterizing these processes, and illustrate the potential of the capillary-lattice model for describing the properties of porous media. © 2014 Pleiades Publishing, Ltd.


Murtsovkin V.A.,OOO Neftegazgeofizika
Colloid Journal | Year: 2014

Results of simulating electrical-conduction and filtration processes in porous media with two-phase saturation have been presented. A three-dimensional cubic lattice of capillaries has been used as a model porous medium. The sizes and amount of capillaries in the model are selected according to a preset pore-size distribution. The results obtained enable one to establish the general regularities of the influence of the pore structure on transfer processes at two-phase saturation, analyze the dependence of the electrical-conduction and filtration processes on the features of porous-medium saturation, and illustrate the potential of the capillary-lattice model for describing the properties of porous media with two-phase saturation. © 2014 Pleiades Publishing, Ltd.

Loading OOO Neftegazgeofizika collaborators
Loading OOO Neftegazgeofizika collaborators