Prospects for the allocation of productive sites in the Jurassic interval of the section in the territory of Syngegan terrace were considered, based on the analysis of seismic survey, drilling and core studies. We identified the interrelation between productive sites of local oil deposits and the centers of rock area of destruction allocated according to seismic survey materials.

Hydrogeochemical conditions of the Yarudey oil and gas condensate field are largely determined by its position within the elysion lithostatic water pressure system and the presence of a large number of faults in the base plate. In the article we explore the main features of the Neocomian and the Jurassic hydrogeological complexes of the field. Underground waters of the Mesozoic hydrogeological basin are characterized by chloride sodium ion-salt composition. They belong to the hydrocarbonate sodium type according to V. A. Sulin’s classification, mineralization is 7,0 g/l in the Neocomian complex and is 11,1 g/l in the Jurassic complex. The existence of complex hydrogeochemical conditions is confirmed by the nature of the change in the genetic sodiumchlorine coefficient (up to 1,4) and boron-bromine coefficients (up to 0,49).

The article considers the main procedures which essentially increase the validity of sedimentological models in limited initial data set conditions. The Bentiu formation (Central Africa) is studied as an example of the research. Using simple and low-cost methods it is possible to identify not only the main direction of sedimentary material displacement but also the main characteristics of alluvial systems that will let to plan exploitation of reservoir formation of such type correctly even on geological exploration stage.

The hydrogeological history of the Anabar-Khatanga basin covers the period from the Archaean to the Quaternary and includes 12 hydrogeological cycles. The Jurassic-Eopleistocene cycle is the longest during which there were continental conditions of sedimentation with the longest infiltration stage (from the Lower Cretaceous to the Neo-Pleistocene). The salts of the Devonian salt basin play a key role in the formation of the groundwater and brines composition within the following structures: Nordvik, Southern Tigyan, Ilya Kozhevnikova, Ledovka and Belaya.

The article presents the experience of drilling horizontal wells at the Koshilskoye oil field in Jurassic sediments (UV1 formation) with application of environmentally safe emulsion drilling mud system BARADRIL-N XP-07 which has proved cost-effective.

The depth of penetration of the binding fluid into the formation is one of the factors to determine the effectiveness of semiconsolidated reservoir stabilization by a chemical method. This value depends on the properties of the productive formation, the component composition and rheological characteristics of the binding fluid, as well as the technological parameters of its injection into the unconsolidated reservoir. The article presents the results of the interrelation of the above factors on the value of fluid penetration radius, the optimum rheological characteristics and the parameters of the binding fluid injection are established.

In oil field practice tracer (indicator) studies are an effective and efficient method of monitoring the state of field development. Using the multifactor mathematical analysis, the nature and intensity of the impact of injection wells on production wells have been compared with the results of injection of indicator liquids. Injection of indicator liquids was carried out along the AS1-3 formation at the Severo-Orekhovskoye oil field through the wellheads of the injection wells. The technique provides for correlation of injection in all potentially possible directions within a given range of action (usually no more than 2 rows), excluding one or more of the wells and more from the analysis. There is a direct positive correlation between evaluation data on indicator downloads and multivariate mathematical analysis data. The convergence of the results is 65%.

The article discusses the results of applying the developed software for numerical analysis of the effectiveness of oil well work. We have studied the object which is similar to BV8(1-2) formation of the Samotlor oil field in its geology and geological and physical characteristics. The software has been created on the basis of physico-mathematical model describing the filtration oil and water in the reservoir, including taking into account the non-equilibrium relative permeability.

The article describes the role of the account the lateral heterogeneity of the continental sediments, updating of drilling strategy, and prediction of the occurrence of the formation. Our aim is to describe approaches for the selection of the most optimal arrangement of wells in drilling strategy, taking into account the constantly updated geological information about the formation.

The article presents the mathematical modeling of heated gas dissociation process into the reservoir saturated with methane and its hydrate. We studied how different factors has affected the dissociation process. The article shows that the gas hydrate dissociation in porous medium originates on a frontal border during the injection of heated gas.

The article discusses the results of synthesis of various derivatives of carboxylic acids and ethanolamine, namely monoethanolamides of stearic and tridecanoic acids. We used azeotropic distillation method for the synthesis. This research allows to value applicability of monoethanolamides as emulsifier invert emulsion.

The article deals with the classical mathematical model of filtration of two immiscible liquids in a non-deformable porous medium taking into account capillary forces. It is the Muskat - Leverett model. The model is based on the experimentally determined functions of water saturation - relative phase permeability and the Leverett’s function of capillary pressure. In the article we study numerically the one-dimensional radial flow with a given flow rate of the mixture. In this case, the Muskat - Leverett model equations are reduced to one quasilinear hyperbolic-parabolic equation for water saturation - Rappoport-Leas equation. The article investigates the influence of the representation of capillary forces in porous media of different structures on the behavior of solutions in the isothermal case.

The article reports a brief overview of the choice of tool hard alloy for processing heat-resistant materials used for the manufacturing of parts of gas turbine engines DR-59, J-59, and DG-90.

When treating the bottomhole zone, the working fluid is supplied to the bottom unevenly due to the fact that the units are equipped with piston pumps. The changing amplitude of the liquid pressure is triggered in the pulsed downhole device. As a result, longitudinal oscillations are created in the tubing string. As the oscillations of the liquid propagate, their amplitude decreases. For these conditions, this is due to dissipative processes, which are called viscosity and thermal conductivity of the medium, the influence of the walls, and also scattering by inhomogeneities. We obtained expressions for determining the forced dynamic displacements and tensile stresses in each section of the tubing string, on which graphical dependences are plotted. As a result of the analysis of these curves, it was found that the usage of pulsed downhole device with a larger area of resistance to the flow of a liquid jet reduces the reliability of the tubing string, and it depends directly on both the design features of the device and the flow rate of fluid pumped into the formation. We also revealed that the reliability of the tubing string is increased by 1,8 times when using a packer for the equipment of the bottomhole of the treated well.

The method of parallelizing a numerical solution of the complete system of Navier - Stokes equations is used to describe three-dimensional unsteady flows of a viscous compressible heat-conducting gas in ascending swirling flows. In this case, the action of gravity and Coriolis forces is taken into account, the coefficients of viscosity and thermal conductivity are assumed to be constant. The results of numerical calculations of the thermodynamic characteristics of flows on smaller computational grids are presented in simulation of the output to the stationary mode of an ascending swirling air flow in an artificially created tornado. We numerically determined the values of density, temperature, and pressure for various fixed times and for different heights of the calculated region. The research shows that in the process of accelerating the gas flow in the center of vertical region a funnel-shaped region with reduced values of density, temperature, and pressure is observed.

According to the results of the study, we found that increasing the pressure in a stabilization column improves the sharpness of separation of butanes from pentanes. As a result, the product quality is getting better. The pilot-industrial runs confirm the possibility of improving the effectiveness of the stabilization columns in various processes by increasing the pressure within the permissible limits.

In the article we considered the following variants of oil classification: technological, chemical, and geochemical (genetic). Applicability of the classification indicators (hydrocarbon composition, fractional composition of oils, asphaltic-resinous components, sulfur content, metal content) is discussed to separate oils to different chemical types Stable direct correlations between sulfur concentration in oils and diverse characteristics of oils allow to consider the sulfur content as an indicator of genetic nature.

The article discusses the results of evaluating the influence of phosphoric ester of oxyethylated nonylphenol (PE NP) on solvent asphalt-resin-paraffin deposits efficiency. Comparative experiments of the changes in solvent technological characteristics, when the content of PE NP is up to 2 vol. %, have been performed. The research shows that usage PE NP significantly not only modifies the solvent technological properties increasing the solvency, the saturation of the solvent asphalt-resin-paraffin deposits, but slightly decreases the rate of the asphalt-resin-paraffin deposits dissolution. We have established that the maximum efficiency of the solvent is observed at concentration of PE NP corresponding to the critical concentration of micelle formation.

In the article we consider the processes occurring at interaction of lakes and wetlands with surrounding geosystems. We pay attention to the formation of soils of heavy granulometric composition in the calcareous and lacustrine zones, which are subjected to salinization, solonetization and merging in the conditions of the forest-steppe and steppe. The research shows that over time, the lakes turn into swamps as the result of siltation and eutrophication, especially during intense technogenesis and agrogenesis. Our results confirm that peatlands are not saline, and they can be used for a variety of purposes. We suggest using environmentally compatible technologies for environmental engineering of wetlands and to return to them the original functions of freshwater lakes.

The article suggests a formal presentation of the concept with the intentional usage of mnemonic names, which forms the methodological basis for the introduction of I4.0 for production systems of the oil refining industry. The concept is based on definition and formal representation of the digital twin of a production system of production of oil products and control systems of this production system. The article contains new terms and definitions that significantly affect the presentation of the processes of digitizing production systems in the oil refining industry.