The relevance of the discussed issue is predetermined by the fact that almost all geological issues are solved on the basis of the models, which accuracy increases considerably, when using sedimentological component. Sedimentological factors control the conditions of formation, placement and quality of a reservoir and caps. It means that consideration of sedimentological models increases the efficiency of exploration for oil and gas, particularly the preparation of sediments for development and their operational drilling.

The article discusses results of the use methodology for quantification of prediction of the 3D model for geosteering. This methodology tested for 90 wells with horizontal completion. According to the obtained statistics to assess factors affecting the reliability of the forecast model and defines the boundary criteria of quality confirmation.

In order to forecast the preservation of drinking water quality, it is necessary to assess the protection of groundwater. In this paper it is proposed to introduce into the calculation of the time of seepage of groundwater contamination an additional indicator - the sorption capacity of clay sediments. Tavda formation extends throughout the territory of the West Siberian megabasin, the clay sorption data obtained are applicable to similar geological models. The sediments of the quarry allow to restore some paleoecological parameters of the habitat conditions of fossil organisms, to give more accurate and newer information about the paleogeography of the area. This quarry fills the gap in observations between the location of Sverdlovsk and Kurgan regions.

The paper presents the problem of studying the sedimentary basins of the Nizhnevartovsky arch and Aleksandrovsky megswell. In particular, the main task at first is to establish zones of maximum accumulation of sediments, the total thickness of the sedimentary discharge of the basin and its boundaries (study of the depths of the occurrence, that is the relief of the surface of the basement). On the basis of the existing catalog of stratigraphic breakdowns it is suggested to claryfy them, to analyze the tectonic development and growth of structures.

A method of maintaining reservoir pressure using a system for formation pressure maintenance of oil reservoirs in the oil fields of Western Siberia is extremely wide-spread. In oil fields as a system for formation pressure maintenance are widely used almost all types of water resources including surface water, groundwater and industrial wastewater. Different calculation methods for predicting the formation and precipitation of salts based on quantitative criteria are used to forecast possible precipitation of calcium carbonate in the flooded oil reservoir areas.

The issues of assessment of nature of reservoir saturation and identifying water encroachment zones within formations of the production wells were considered. Criteria which allow classifying reservoirs according to nature of their saturation were given. Assessment of reliability of resistivity of permeable interlayers in heterogeneous reservoirs containing dense carbonized intercalation was carried out. If this interlayeris not distinguished on the optimal probe of apparent resistivity, then the resistivity of permeable accumulations in a heterogeneous reservoir is roughly equivalent to the average indication of the optimal probe.

In the paper the material composition of volcanic-sedimentary Triassic and Permian-Triassic sediments of Severo-Sosvinsky and Sherkalinsky grabens is considered. The scheme of distribution of Triassic and Permian-Triassic sediments of the western territory of Khanty-Mansiysk Autonomous Okrug - Ugra is presented. The sections of the wells, that have revealed the sediments, specific for grabenlike depressions, are described. The oil and gas content of volcanic-sedimentary sediments of Permian-Triassic age in the west of Khanty-Mansiysk Autonomous Okrug - Ugra was analyzed.

The technology of conducting hydraulic fracturing in extracting and injection wells and the techniques of selection of wells for hydraulic fracturing in operational fund of wells of Priobskoye field had been reviewed. Based on the conducted analysis of technologies of enhanced oil recovery the necessity of conducting hydraulic fracturing in low-productivity reservoirs was proved.

Analysis of physical mechanical properties of the geologic section of the drilled wells and analysis of working off of bits, used for drilling of conductor were carried out. Conclusions were drawn regarding the efficient combination of bit and mud motors designs, demonstrating best results of mechanical speed and drilling rate.

The article provides the analysis of factors affecting the reservoir properties (filtration and capacity) during repair works. It is revealed that the maintenance of filtration and capacitive reservoir properties is ensured by high-quality blocking and unblocking the reservoir, as well as by prevention of clay material swelling. Solution of these problems is possible through proper selection of the bridging agents (nature, type and fractional composition) used in the blocking composition, and various functional additives (salts, polymeric reagents and surfactants). Furthermore, the reasons of clay minerals swelling and various ways to prevent this process are analyzed. It is determined the peculiarities of clay minerals structure are essential for their properties, and in particular, their ability to swell.

The paper presents correlation-regression analysis of the influence of various factors on the oil production rate of wells with horizontal completion. Attempt was taken to create a model of multiple correlation for explaining the combined effect of these factors on production rate. The model allows both predicting with sufficient accuracy rate the production rate of the well based on drilling and completion data with a sufficiently high proportion of accuracy, and ranking various factors according to the degree of their influence on production rate.

The analysis of the problem of reducing the permeability of the reservoir wellbore zone during hydraulic fracturing as a result of interaction between carrier of proppant (gel), formation fluids (formation water and hydrocarbons) and mechanical impurities was conducted, the solutions of this problem were presented. The methodical and technological solutions for the well bottomhole treatment with solutions of special compositions (reagents) were given, which with sufficient efficiency contribute to the restoration of the fracture crack permeability. The proposed methodical approach is recommended to use before the massive use of well treatment technologies in order to increase their productivity.

In this paper the influence of condition the cement stone behind the casing on the temperature of extracted well production was considered. The calculations to assess the additional heat losses were performed. Analysis showed that in primary recovery fountain well the negative effect on the product temperature is at maximum. A practical application of the obtained resultswas suggested.

In the case of self-kill of wells, the gas flow velocity in the lifting column is not sufficient for carrying to the surface of the liquid, accumulated in the wellbore. To remove liquid from the bottom of wells, solid and liquid surfactants are used. As a result of conducted studies of surfactant compositions, the components of surfactant solutions were chosen to remove liquid from the bottom of wells.

The results of development of the method for adapting the rise of gas-water contact by adjusting the for-mation anisotropy based on actual well measurements are presented. The efficiency of the applied method is shown in the example of Yubileinyoe gas field.

The analysis of efficiency at engaging into development of hard-to-recover reserves of oil of horizontal wells using multistage hydraulic fracturing has been conducted. The results are presented as a comparison of the dynamics of their work to directional wells, in which also hydraulic fracturing had been held.

The article analyzes experimental and analytical studies of ascending swirling air flows. In experimental works such flows are considered from the point of view of the direction of twist, the thermal regimes of heating the underlying surface, the estimation of integral parameters, the method of influence on them, and various methods of visualization. In analytical papers, by constructing solutions of the system of gas dynamics equations, the emergence of a twist of the corresponding direction is proven when there is a gas flow into a vertical cylinder of nonzero radius. In addition, in the numerical modeling of thermal ascending swirling flows, a feature was observed in the behavior of a moving gas at the initial moments of flow formation when the underlying surface was heated locally. This feature consists in the appearance on the boundary of the heating region of counter propagating gas flows with opposite directions of twist. The paper presents the results of numerical simulation of three-dimensional unsteady flows of a compressible viscous heat-conducting gas in thermal swirled vortices with local heating of the underlying surface, taking into account the action of gravity and Coriolis forces.

The paper describes the process of establishing a regulatory level of quality of construction and installation works, taking into account the implementation of effective quality management systems, which in turn leads to an intensive development of quality assessment methods of construction production in all stages of its life-cycle. It is shown, that the cost-effectiveness of switching to the new regulatory level of quality of the final production of the construction production in comparison with the preceding, basic level, can be represented in a functionalanalytical form.

The technique of diagnostics of the internal cavity condition of gas pipelines is provided, which allows determining the hydraulic resistance of pipelines with assessing it’s reliability, as well as the presence in the main pipelines of various types of deposits, their physical appearance and location.

New analytic formulas were obtained for storage capacity of the elementary section of the gas pipeline, taking into account the inertia of gas and linear change of leveling height of pipeline route. On their basis numerical simulation and analysis of change of this indicator in length at various static conditions of functioning of the gas pipeline were conducted.

In this paper we propose a variant of conjoint work of a fuzzy controller with a mathematical model of the preparation of extra heavy crude oil by reducing energy expenditures for transportation of heavy oil. This is accomplished through the use of models-identifiers of state of the flows in the circuit of control system of installation for oil heating in the primary preparation of extra heavy crude oil for it’s adaptation in the conditions of uncertainty on the basis of systemstructured mathematical modeling of the process.

One of negative impacts on the environment is emission of hydrocarbonic raw materials at emergencies. Wear of pipelines, their operation over the standard, metal corrosion, the latent defects are the main reasons for accidents.

There was obtained an empirical equation describing the relationship between the intensity of the formation of asphalt-resin-paraffin deposits and physicochemical properties of asphalt-resin-paraffin components. The intensity of the formation of the asphalt-resin-paraffin deposits is a function of the melting temperature and density of asphalt-resin-paraffin components. The equation is valid for the formation of a paraffin type deposits in the asphalt-resin-paraffin components melting temperature range from 65.0 to 91.2 °C and their density from 0,799 to 0.851.

Data was obtained on relative reactivity for different type bonds in reactions with hydrogen atoms, methyl radicals, and also on effective relative reactivities when using an inert diluent, allowing deepening the knowledge about pyrolysis of raw materials of a given composition. A method has been developed for increasing selectivity of process for target products (lower olefins), lowering yields of liquid products of condensation and specific energy expenditure, based on influence of hydrogen on thermic reactions of alkanes and alkenes.