In the territories of Purovsk, Nadym, Tazovsk and Yamal areas the problem of pollution of soils by hydrocarbons and damage of the permafrost zone soil-vegetable cover is particularly acute. The anthropogenic stress created by oil and gas field facilities is significant currently and will grow in the nearest future which at the present level of technologies can aggravate the existing ecological situation.

The specifics of the transition zones of oil pools underlying the source rocks were determined on the basis of the secondary migration mechanisms analysis. The determined features permitted to explain different oil saturation coefficients and a different degree of the production water cut at equal height above the the free water table and equal porosity and permeability characteristics of the reservoir, which earlier was not possible in view of the capillarygravitational theory.

In the article the methods of well workover realization within offshore hydro technical facilities are considered. The necessity of application of a compact, small-sized surface equipment allowing well work over without tubing strings ret rievalin conditions of limited technological space on an offshore platform is justified. Herewith, standard methods of technical well workovers with the help of wire line technique do not meet the necessary requirements because of complicated horizontal and directional wells profiles. On this base, the authors suggest the well work over realization with the use of coiled tubing technology adapted to offshore hydro technical facility conditions.

In the process of ESPs operation there often appear intense vibrations, leading to «a flight». For long-time operation of the unit used as a component of the drill string, it is desirable to keep it at rest. One way to accomplish this is to connect the unit with a damper that can reduce the fluctuations. The article considers the most optimal option of such connection, and the method of calculating the parameters enabling to significantly reduce the unit vibrations amplitude that will favorably influence the duration of its operation.

The article analyzes the intermolecular interactions in drilling fluids according to the conceptions of the supramolecular chemistry. Using the calculation method the values and the validity of orientation, induction and dispersion interactions in the formation of hydrogen bonds were obtained. It is shown that the interactions between the «nanoclay », multicharge, multifield and molecules of water lead to the formation of stable hydrogen bonds in the aqueous dispersion medium of the drilling fluid.

The paper considers the distinctive features of study of horizontal wells with formation hydraulic fracturing.

The factor that is the most determining for the accuracy of the hydraulic systems models and in particular the accuracy of the productive strata hydraulic system model (PSHS), is the accuracy of input data, i.e. the reservoir properties corresponding to the initial state of the PSHS elements, the formation cells; the approximation coefficients for the basic relationships; relative permeability curves; fluids and rocks deformation properties; boundary conditions, etc. Therefore, the quality of input data to a greater (in relation to the factors of calculation accuracy) extent determines the correspondence of the values of the estimated output data of the models to the actual measurement values, namely the dynamics of the injection, observation and production wells performance in which the recording of bottomhole pressure, flow rate and fluids composition of the fluids in wells varying with time is run.

Based on the results of laboratory and field tests of formation hydraulic fracturing (FHF) some basic factors are defined which influence upon the effectiveness of FHF technology involved the injection of large quantities of sand into the formation. These factors include a no strictly orthogonal trajectory of FHF fracture; abrasive destruction of initially round perforations; off-center positioning of quashhead shells inside the casing; sphericity and roundness of the proppant (sand) particles, etc.

The article outlines the materials of the researches, aimed at studying the loads, acting on the drill bit of cutting and shearing principle in the process of drilling rock sample at the stand. A placing scheme of the measuring equipment (strain gauges), based on the principle of independence of measurement of each of the parameters affecting the drill bit, is developed. As a result of the research is considered the possibility to calculate the point of impact and main force moment of system of forces, influencing the drill bit from the rock.

The technology aspects of codeposition of metal ions and dispersive particles on the cathode are studied. The basic parameters effecting the formation of the structure and physico-mechanical properties of CGC at penetration of the strengthening dispersive particles into the matrix of coating have been defined.

The characteristic feature of the present-day development of oil industry of Russia is a transition of many developed fields to a stage of declining production of hydrocarbon raw materials. At a continuous growth of oil consumption the mineral resources are exhausted which determines a need in solving the major economic problem formulated in the document «Power strategy of Russia for the period till 2030», i.e. ensuring high volumes of oil and gas production and increase of the oil recovery factor by 35-37 %. Currently, search for and development of new technologies and implementation of advanced methods of enhanced oil recovery will lead to improvement of the efficiency of the Russian energy sector, in particular, the fields developed by JSC «Gazpromneft-NNG».

The article discusses development of the backfill composition based on OTDV «Mikrodur». A method of mathematical planning of the experiment is described used to prove the optimal formulation of water isolation composition and the processing of the study results by application of the procedure of “full factorial experiment”. The results of the study by computer microtomography of the formed plugging stone are also presented.

Obtaining of the information about reservoir properties of formations is the basis of designing and the results analysis of production stimulation methods. Now two directions have been widely studied and applied, i.e. the hydrodynamic studies implementation using the method of the level recovery and the prolong analysis of dynamics of well producing characteristics. The paper discusses the practical application of both approaches for estimation of the need in treatment and the results of production intensification methods.

The ultimate goal of this work was to develop a method which can be used in mature oil fields to determine the effective viscosity of the granulated gel (PPG) used for plugging the anthropogenic fractures (after FHF). Using the laboratory fracture model the values of constants (apparent constant consistency, ka, and the apparent index of pseudoplasticity, na) were obtained for the equation of viscoelastic liquid. The same constants were used in the derived equation for pressure gradient along the artificial fracture. The gel effective viscosity was calculated based on the equation of the gel motion along the fracture. This equation enables to calculate the effective viscosity of PPG for each size the granulated gel fraction depending on the fracture width and the gel injection rate.

To assess the reliability and durability of certain elements of the weapons of drilling cone bits and support assemblies of cutters and bits in General, it is necessary to know the magnitude of the forces acting on the elements of cutting structures of rolling cutter drill bits in the process of its interaction with the bottom. The method and results of direct measurement of these forces with the help of a special measuring device to measure the amount of force acting on each tooth of each cutter in the interaction with the indestructible face. Found that the greatest axial forces acting on the teeth of the secondary cutters. The obtained results can be used to optimize the design of drill bits.

The article is devoted to the problem of bringing the desired load to the drill bit and improving the technical and economic indexes of drilling at drilling the oil and gas wells. The authors propose a bottom-hole assembly (BHA) consisting of PDC bits, downhole oscillator, screw downhole motor, measuring-while drilling system and drill pipes. The results of the proposed assembly pilot tests are presented. The tests were conducted in well No. 6053 in Sheremetyev field, Tatarstan Republic.

The article considers the results of pilot testing of successive oil and water pumping by centrifugal pumps. It was defined that at achieving the pumped production water cut of 80 % and more the effectiveness of pumping of water and oil by alternate batches is actually absent due to a fast phase stratification in the pipelines.

It is proved that complex flows of the viscous compressible heat-conducting gas, arising during heating the vertical field, have a pronounced axial symmetry. Therefore, for the numerical solution of the full Navier-Stokes equations for description of such gas flows it are advisable to use a cylindrical coordinate system. This paper describes the transformation of the first projection of the equation of motion of the full Navier-Stokes equations system. The result of the transformation is a record of the first projection of the equation of a continuous medium motion in the cylindrical coordinate system.

It is shown that failures at normal operation of pipeline transport occur largely due to the cyclical nature of degradation processes that are inherent in the system with various soil and swamp covers and are accompanied by sharp negative temperature gradients. A model of methane liberation processes was generated. The method of molecular beam epitaxy was analyzed, which permitted to capture the volume and cyclicity of methane liberation, to measure all noises and signals in different frequency ranges.

The article considers the problem of estimating the allowable values differential settlement of the foundation base and vertical steel tank RVS-20000. According to the results of calculations using the finite element method proposed criterial dependences allowing to determine the maximum permissible value of the residue RVS-20000.

The regularities of the fuel chemical composition influence on the vehicles performance and ecological characteristics are revealed. The use of the fuel additive is proposed, which improves the fuel spraying in the engines, prevents a gummy residue in the fuel system thanks to the effective deterging action and catalyzing reaction of gasification inside the engine. The additive use significantly reduces the toxic emissions and fuel consumption and improves the performance of vehicles.

The influence of facilities on the foundation made of water saturated ground is studied in view of the impact of various external forces on the foundation. The developed mathematical model of the stress-strained state of the system «facility - foundation» enables to determine maximal stresses and strains occurred in the foundation. The numerical solutions were obtained using the modified finite-element method which took into account the impact of the pore water on the strain characteristics of the ground mineral particles.

The article presents the analysis of technical and economic efficiency of replacement of a boiler house by a heatpumping unit that uses as a low potential heat source the heat electropower station waste water.

The article deals with the issues related to the hydrocarbon reservoirs oil recovery enhancement. It describes the bench laboratory experimental studies. The results obtained during determination of fluid leakage through the rock samples and the amount of absorption of pressure fluctuations at various regime parameters are presented. Using the experimental data the regression analysis was performed on the basis of which the qualitative correlations between factorial and resultant features were identified. Using the regression equations the graphic relations were constructed. It was found that with increasing the oscillation frequency of the fluid the amount of fluid passing through the sample of porous medium increased, with the highest value of q reached at the frequency range of 600 ... 1000 Hz. With increase in the oscillations penetration depth the absorption of the amplitude of the pressure fluctuations corresponds to the linear decrease, and with the overburden pressure increase the linear variation of absorption is distorted.

The paper considers the chemical characteristics of wastewater discharged into the surface water bodies on synthetic surfactants (detergents), phosphorus, iron, sulfates, chlorides, ammonia nitrogen, nitrate, nitrite Purovsk district YaNAO. The concentration of pollutants in the monitoring section water for the purpose of comparison with the maximumallowable concentration was calculated. The correlation analysis between anthropogenic pollution of water resources and climatic conditions of permafrost regions was carried out.