The paper describes the Neocomian section stratification into seismofacial complexes including reservoirs in the coastal zone, into the relatively deep water isochronous clinoformic formations of the Achimov series. Based on the seismogeological correlation from the reference section to the north along the line of regional seismic profiles there were mapped the boundaries of the areal spread of the seven seismofacial complexes within the Gydan oil-and-gas bearing area.

The article considers the hydrogeological stratification of the West Siberia megabasin based on the data of deep and ultra-deep wells drilling. The Triassic hydrogeological complex is recognized as a separate taxon in the Mesozoic basin section of the underground waters. The Triassic complex has a complex lithofacies structure. The porosity of the sedimentary volcanogenic reservoirs is comparable with the Jurassic deposits (up 20%). The inversion of mineralization and ion-salt composition of water is traced, what is a criterion of oil and gas presence.

The article presents a description of laboratory studies of the material composition and particle-size distribution as well as porosity and permeability properties of Kharosoim suite and related clinoform complex. By now, in the deposits of the Kharosoim basin no hydrocarbon pools have been found, however, non-commercial gas influxes and gas presence indications have been revealed that permits to consider this basin as potentially perspective.

The perspectives of Senonian sediments oil-and-gas presence in the northern areas of Western Siberia are considered. The results of the study of the Senonian reservoirs structure specific features within the oil-andgas-condensate field Medvezhie are presented. The Senonian deposits fracturing identified by the sedimentation truncations and time thickness maps between reflecting horizon G and reflecting horizon C3 is presented. The conclusions are drawn about the relationship between reservoir rocks porosity and permeability properties and the location of fractures.

On the example of several fields in the north of West Siberia the features of spatial distribution of zeolites in the Neocomian reservoirs productive deposits were described. For the beds BU13-15 a regional nature of zeolitization process confined to the areas of regional faults was determined. The most probable mechanism of zeolites formation associated with a maximum metosomatic influence on host rocks was demonstrated.

In this paper a new method of identification of the inflow profile (injectivity) in the horizontal hole based on the interpretation of pressure drawdown curves is presented. It is shown how the variation in the length of the zone of the influx to the horizontal hole after the acid treatment influences on the fluid flows in the formation and the pressure drawdown curves registered in the well.

This paper describes the studies of prospecting appraisal boreholes in the process of their drilling as well as the method of liquidation of open gas blowout occurred at emergency, The basic reasons of well killing failures in the abnormally low reservoir pressure conditions at heavy killing fluids loss are outlined. The technology of well killing by injecting the saline solution of appropriate density into the annulus through the tubing is considered as most common. It is shown, that in the conditions of complicated geological structure of the East Siberia fields representing in its spatial totality deep faults and magmatic columns there formed the zones of increased permeability in which regular traditional killing liquids do not work. It is underlined that there is a need in new compositions one of which may be viscoelastic composition based on Teksotril, the polymer of BT-X type, and sodium hydroxide of commercial grade. However, this composition along with its positive properties possesses a number of disadvantages that require improvement.

The article describes one of the methods for reducing the viscosity of water-cut oil in the field pipelines. The practicability of using the technology of successive pumping off of oil and water through the field pipelines is considered.

The paper presents the analysis of studies of directional wells profile. Based on the parametric equations of transcendental curves at initial set conditions the profiles were constructed and the relationships of the radius change and a degree of the path sections bending by the hole depth were determined.

Development of gas-condensate fields require introducing new technologies of inflow stimulation. One of the most effective stimulation methods is formation hydraulic fracturing. In this paper the technology of formation hydraulic fracturing realization is described. It is demonstrated that the results of operations performed prove a necessity of a thorough selection of wells for applying FHF.

The paper presents the analysis of technology factors influence on permeability of the bottom-hole formation zone in the West Siberia fields. The properties of terrigenous sediment rocks are considered. The characteristics of well killing liquids applied in the field Yamburg are described. New compositions of for well killing and formation blocking in the conditions of low reservoir pressures are offered.

The article analyzes the results of the analytical study of distribution of load between the bearings of cone bit support. Based on the conditions of the roller cutter balance and the combined deformation of the bearings components the relationships were received allowing a determination of the value of responses in bearings at various options of load application on the roller cutter. A method is offered which can be used to optimize the equipment and cone bit bearings design.

The problem of inflow to the horizontal perforated hole of the oil well in the stationary mode is considered. This problem is solved using the point flow function. A system of equations describing the process of oil inflow in the stratified bed to the horizontal well and the oil movement in the horizontal perforated hole was received. A combined solution of the obtained equations system enables to calculate the profile of inflow to the horizontal hole, the pressure drop in the hole and the increase of velocity of the developing stream through the hole depending on geological and physical parameters of each interlayer, the well path, the arrangement of perforation intervals and other parameters. An example is shown of calculation of horizontal oil well with three perforation intervals located in differently permeable interlayers. The inflow profile change at increasing the density of perforations placement in different perforation intervals is shown.

In this research questions of creation of mathematical model of integrated system of a gas and gascondensate field and methods of the solution of the received equations are considered. The conception of the simplified description of process of the extraction is offered. This allow to efficiently operate a field. The implicit algebraic equations representing the solutions of the differential equations in private derivatives are put in a basis of mathematical model. The method of the solution of a problem of optimization of production of condensate is given.

The article presents a brief review of the most common methods of sand control and points out a high efficiency of slotted expandable sand screens (ESS) application to prevent sand production. To develop the techniques for ESS selection for a particular well an estimation of comparison of strength calculations using Sarkisov’s formula stated in State Standard 632-80 and the results obtained by the finite element method (FEM) in the software ANSYS is offered. The article highlights a possibility of using the ANSYS software for accurate calculations of strength characteristics of slotted tubular goods when applying FEM and introduces optimum parameters of the software setting up.

The specific boundary conditions are proposed under which the upward gas flow is simulated by blowing through a square hole in the upper plane of the computational domain. The results of calculations of velocity parameters of the arising upward swirling flow are presented. The instant streamlines of this complex flow of gas were constructed. It is demonstrated that the three components of gas velocity undergo noticeable changes at the initial stage. It is also proved that at increasing the calculation time the velocity characteristics and the entire current in general stabilize gradually reaching a steady-state mode.

At reduction of gas at a gas-distributing station the pressure is declined which is accompanied by the increase in the gas flow velocity resulted in noise generation. Using the calculation a general and octava levels of acoustic power of noise are proved and these levels are compared with the results of measurements of the noise level in the territory and in premises of gas-distributing station.

The mathematical modeling is performed to elicit the heat exchange effect on the process of gas hydrate grains coalescence in the porous scales on the surface of the technological equipment. The simulation results are compared with experimental data obtained by researching the propane hydrates growth. A criterion for realization of different modes of gas hydrate scales is developed.

The article presents the principle of the implementation of graph-projection moire method and its differences from existing optical measuring methods. Based on the experiment, a comparison is exactly the shadow moire and graph-projection moiré methods.

The analytical solution was obtained reflecting the dependence of gas turbine engines effective power on their design and thermodynamic features as well as on parameters characterizing the engines operation conditions. This solution enables to determine the power developed by the engines based on the minimum information about their operation conditions. It is shown that for this it is enough just to get readings of regular meters. Using the received equation a procedure was developed for estimation of the engines technical state which enables to make such estimation on the probability basis and also in the extended option because it permits to get the engines power characteristic in expanded form.

Experimentally justified solution to a technical problem, which provides improvement of technology of pyrolysis of oil sludge disposal method using synthesis reactor, which allows to obtain methanol from hydrocarbon waste.