Discovered hydrocarbon deposits in a number of fields are the characteristic of the industrial productivity of Jurassic sediments in the north of Western Siberia. Most of the deposits are in the Middle Jurassic sediments, the signs of hydrocarbons have been obtained in the Lower Jurassic sediments, single deposits have been obtained in the Upper Jurassic sediments. This uneven distribution of deposits in the Jurassic oil and gas bearing facility is associated with the complexity of its structure. Therefore, there is a need to conduct a comprehensive analysis of the geological structure of Jurassic sediments, to identify geological parameters to predict commercial oiland-gas content zones in the investigated territory.

Based on the results of the study of deep drilling data, seismic survey in the north of Western Siberia, schematic maps of the depth zones of Jurassic sediments have been constructed, the author of the article determines the parameters of industrial productivity zones. The most significant parameter is abnormally high formation pressure. Based on the conducted researches, the author notes the prospective commercial oil-and-gas content zones for Jurassic sediments within NadymPur watershed.

Geochemical survey is commonly applied during geological exploration to predict petroleum potential of large areas and to estimate the content of traps identified by the results of seismic survey. C1-C6 hydrocarbon concentrations in samples of surface and subsurface air, soil, snow, water, etc. are used as predictive indicators. At the exploration stage the capabilities of geochemical methods can be significantly expanded by comparing the content of gasoline hydrocarbons in samples of formation fluids and in samples of near-surface sediments. The method of chromatographic analysis of gasolines Chromatec Gazolin has been adapted for sample analysis. The taken measures to increase the sensitivity allowed us to register individual hydrocarbons C1-C10 in concentrations up to 0,01 ppb, which is obviously lower than their background content in the oil prospect areas. The revealed patterns are used in the geological interpretation of geochemical distributions based on theoretical ideas about the subvertical migration of hydrocarbons from the reservoir to the surface.

The sequence stratigraphy is currently, on the one hand, a leading approach in the study of the internal structure of sedimentary basins, on the other hand, a creatively developing discipline, the conceptual basis of which is being developed. The concept of a «system tract» is one of the most questionable concepts of sequence stratigraphy. According to the classical definition, system tract is a lateral sequence of facies, in accordance with modern definitions system tract is a geological body bounded by sequence-stratigraphic surfaces. It remains unclear: whether the idea of the lateral ordering of the system tract has been preserved in the modern definition. The author of the article has performed an analysis of two well-known sequence-stratigraphic models to answer this question. It is model Depositional Sequence II and model Depositional Sequence IV. The concepts of «facial unconformities» and «facial series» became the basis of the analysis. The author has constructed his own version of the sequence-stratigraphic model for the sedimentary basin. According to the results of its analysis, the author proposes to include the concept of «facial series» in the theoretical basis of sequence stratigraphy. The concept of a «system tract» is recommended to consider as a geological body bounded by genetic facial unconformities.

The article deals with the granitoid magmatism in the territory of Frolovskaya megadepression. Granite massifs are usually confined to erosion-tectonic ledges of the foundation, located in tectonically active zones, usually with increased heat flux. The  detection of such massifs allows to predict the development of improved reservoirs in the zone of contact with sedimentary cover rocks. The age of granitoids is the Middle-Late Paleozoic. We clarify the boundaries of granitoid massifs and distinguish new massifs based on new information on geology and seismic survey. Also we analyses the connection of temperature, productivity with granitoids and foundation blocks.

The article analyzes the reservoir behavior on the decline of falling production and field stops, shows the indicators of well bushes at one of the fields in Western Siberia, including four production wells and one observation well. The calculations have been performed on a threedimensional geological and technological model, which is adapted to the history of the deposit development taking into account its ground infrastructure.

The article reports the results of the analysis of the field prospecting activities of five exploratory wells at the Karmalinovskoye gas condensate field. We have found that the eastern part of the licensed area is characterized by the lack of fructuring in Paleozoic deposits, and the development of the productive deposit extends in the north-west direction. Hydraulic fracturing made it possible to get a stable gas and gas condensate flow rate in well № 4. This volume exceeds 3,8 times as large than flow rate in wells № 1 and № 2, which were tested after drilling without conducting hydraulic fracturing.

We have estimated the effectiveness of cyclic waterflooding in PK1-3 formation of the Vostochno-Messoyakhskoye oil field. This reservoir is saturated with high-viscosity oil. The obtained data are described in the article. The calculations have been performed on different simulations models with multiple variations of lateral and vertical heterogeneity of the reservoir. The result of our work is the program of cyclic waterflooding research for the VostochnoMessoyakhskoye oil field.

The article pays attention to the fact that biopolymer drilling solutions without a solid phase acquire viscoelastic properties in a porous medium that are not fixed by means of standard drilling rheometry. Filtration and micro-rheological (pore scale) studies have established that the depth of penetration of the filtrate and the screening of the bottomhole zone in this case are determined by the degree of structural-mechanical colmatation resulting from the contact interaction of the liquid and rock null.

In this article we construct a modification of the model of counter-current capillary imbibition with oil viscosity dependent on dynamic water saturation. This approach corresponds to the approximate modeling of the complex composition of hydrocarbon fluid and taking into account the fact that a change in oil viscosity is recorded in some fields with an increase in the share of water in the extracted liquid at different stages of oil field development. The behavior of solutions under variation of model parameters is studied numerically. It is shown that the leaching of lighter fractions of oil at the first stages of operation as a whole increases the terms of achievement of project indicators. The influence of gravity on capillary washing of hard-to-reach places is analyzed.

To study the unsteady fluid motion in a tubing string, when it is pumped, the classical equation of hydraulic impact is solved at the first stage. The solution was carried out by separating the variables taking into account all real initial and boundary conditions. The problem of distributing the hydraulic impact of a viscous liquid in a tubing string from the operation of impulse devices at the bottom of a well as a homogeneous system in which all processes occurring during fluid injection are interrelated. As a result, expressions were obtained for determining the velocity of the fluid and the amplitude of the change in the fluid pressure in any arbitrary section of the liquid column inside the tubing string, over which graphical dependencies are plotted in relative values for different pipe diameters. The results obtained make it possible to predict the reliability of the pipe string for pulsed non-stationary injection of liquid under pressure.

The new field development, as a rule, is faced with the problem of providing construction facilities with material and mineral resources. Medium-sized sandy soil is a one such resources. It is necessary for the footing of buildings and structures of the constructed technological infrastructure. The problem solution is seen in the rational usage of available natural resources, including soils. We have studied granulometric composition of medium-sized sandy soil to evaluate its influence on its deformation properties. Based on the results, we offer the technology of regulation of deformation properties of sandy soil.

The gas pipeline system of PJSC «Gazprom» is at the stage of long-term operation. Most of the pipelines exceed the standard service life of 33 years, while considerable resources are required to maintain the trunk gas pipelines in an efficient state. The article analyzes the defectiveness of gas mains by the example of LLC «Gazprom transgaz Ufa». The company’s gas pipeline system consists of a wide range of diameters pipes ranging from DN 400 to DN 1400 mm. Its structure is dominated by pipelines with a diameter of DN 400, 500, 700, 1400 mm, which share exceeds 86 %. An integral Gini index is proposed for monitoring the differentiation of defects along the length of the line pipe of the main gas pipelines. By the value of the proposed indicator, it is possible to analyze and compare the sections of gas pipelines among themselves, to identify the signs that affect the development of defects along the line pipe of the main gas pipelines.

Comparison of elemental compositions of oil, coal and biomaterial has shown that a source of oil and gas systems and coal is mainly not biomass, but the deep abiogenic hightemperature fluids representing a mixture of light hydrocarbon, sulfur, metal-containing structures, etc. In the course of the fluids movement towards the Earth’s surface, hydrocarbon under catalytic action of sulfur and metals undergoes polycondensation transformations to afford hydrocarbons of various types and molecular mass, sulfur- and organometallic compounds. Formation of a hydrocarbon system depends on a structure of the fluid.

The article is devoted to the diagnostics of friction bearing of turbine generator and determination of the reasons of its destruction during exploitation. We have studied chemistry and mechanical properties of metal, have calculated strains acting on the shaft of turbine generator in the case of asymmetrical electric load. In the article we present the results of macrostructural and microstructural analysis with usage of modern technologies. According to the data diagnosis obtained, we conclude that the source of bearing destruction is babbit fatigue damage caused by asymmetrical electric load of generator. We recommend controlling the rate of bearing wear by monitoring of babbit components presence in oil and asymmetry of electric load to prevent similar destructions.

The approach of electrothermo analogy for the analysis of thermal processes is considered. This approach is obviously justified, since it is based on a deep physical analogy of the processes of heat propagation and electric current in various media. The study aims to analyze the distribution of heat fluxes in the system «workpiece — cutting insert — tool holder» (W–CI–TH), taking into account external and internal cooling. We present the set of parameters of the system (W–CI–TH), which gives grounds to consider them as elements of the block diagram of the control system for the thermodynamic mode of turning materials of any physical and mechanical properties, which is the subject of independent researches.

The article is devoted to the description of the author’s method of calculating the operating modes of turbo-driven gas-pumping units and compressor stations containing them. The proposed calculating method provides the most economical operating modes with the lowest possible and relatively planned equipment wear, as well as with the lowest possible power consumption. The application of this method of calculating in the framework of an automatic process control system is able to give gas-pumping units and compressor stations containing them the properties of self-governed systems that are able to automatically self-diagnosis and change modes according to the diagnosis results.

The article presents the results of laboratory studies designed to explore the influence of various sorbents and different doses, as well as biological product «Buck-Verad», and others components in content of petroleum product in oil sludge. As a result, we have found a positive effect of studied factors on the dynamics of declining petroleum products in oil sludge.

Operation of oil and gas fields has significant influence with the territory of traditional environmental management. Environmental principles are basis on the concept of sustainable land and environmental management of the northern oil and gas regions. The aim of these principles is to keep the native habitat and traditional way of indigenous peoples’ life. Taking into account environmental principles, an environmental-economic framework of Yamal district of Yamalo-Nenets Autonomous Okrug was formed in order to maintain a balance between natural complexes and human economic activities. The coefficient of ecological stability, calculated taking into account the functioning of the elements of the framework, and the coefficient of ecological tension characterize the relative stability of the territory. An environmental-economic framework of Yamal district should act as a way of management of the territory through the established modes of using its main elements to ensure sustainable land and environmental management.

The aim of the article is to study one of the most unusual coasts of the Caspian Sea in the Kazakhstan area. This coast is not only a place, which was chosen by JSC «KazMunayGas» for construction of a shipyard, but also a territory, on which land is suitable for the development of vegetable and melon crops growing. In the article we consider sites № 1 и № 2 as the alternatives for the shipyard construction. The subject of the research is assessment of the impact of the planned shipyard construction on soil condition of local vegetation. The increased content of some heavy metals (Cu, Cr, and Zn) in the soils of the chosen area is substantiated. Cartographic materials have been completed using well testing software products: Marmfo Professional v.10.2 SAS. Planet 160707.