A range of problems of errors related with directional surveying at generation of geological models, horizontal wells construction and horizontal borehole sidetracking realization is considered. In addition to the methods of errors diagnostics using three-dimensional geological models the statistics is presented on discrepancies of repeated measurements at directional surveying in bottomhole absolute depths and distance between the bottom-holes for 100 wells.

The paper offers innovation concepts, ideas and approaches for further development of petroleum geology. It justifies the use of rehabilitation cycles in the process of oil and gas fields development especially in the period of their active (forced) operation. The threshold of oil saturated systems state stability is defined. A method is proposed and proved for modeling the hydrocarbon deposits state dynamics using the evolutionary equation of the type ∂p = Z (p, a, t).

The paper reviews the new data on the secondary zeolite mineralization characteristics for the Lower Cretaceous deposits of the West Siberian plate north. The authors suggest that the zone of distribution of altered rocks is much wider and in addition covers the area of Russkoye field. A new method of accounting of the volume of minerals of the zeolite group is proposed based on using the value of the volume fraction content of zeolites, which allows for a more qualitative approach to calculation of volumes of hydrocarbons in this type of reservoirs. It is shown that in major foreign deposits, complicated by the zeolitization processes, in order to improve the performance of the bottom-hole zone it is recommended to use a solution of hydrochloric acid.

The problem of raising the level of ground urban land Tyumen now has priority. This is due to the intensive development of the city. It is established, natural and technogenic factors have an impact on the groundwater level regime in built-up part of the city. Since 2014 within the territory of Tyumen fixed the next cycle of many years of rise in groundwater levels.

There are two methods under consideration of using neutron logging data for the construction of seismic and geological models of oil and gas facilities in Western Siberia. The first method - the reconstruction of the acoustic properties of the well according to the neutron log. The second method - the development of a well-known technique Gardner L. A. determining density properties according acoustic logging. To the point neutron logging data are used to account the lithology. Combining these methods can restore acoustic and density properties of the geological cross-section only by using neutron logging data.

The article described a method for assessment of the structure uncertainty. It presents a description of the accepted concept on calculation of the structure uncertainties for the period of 1984. The advantages and draw-backs of the offered method are considered. Additionally the calculation of the structure uncertainty error is described by step-by-step manner. It also covers some problems that have occurred as a result of error spatial distribution at calculations.

It is shown that the changed conditions of gas and gas-condensate fields operation entailed an increase in complexity of well repairs using coiltubing technologies. However, the methods developed for wells recovery in terms of emergency-refurbishment and water-influx restriction works are not provided for by the existing classification of complex well repairs which makes difficult to justify the length of repair works and, accordingly, their cost. The suggested amendments to the current structure of wells repair types promote further development of technologies of well workover in the conditions of oil and gas production decline .

In this article the expediency of using the coupled hydrodynamic and geomechanical model for prediction of sand production probability is considered. Additionally to the review of scientific papers a comparison is made of results obtained by several synthetic models in the course of the experiment. Based on the study results there was prepared a list of the fields characteristics the presence of which should indicate the necessity of using the coupled hydrodynamic geomechanical model for calculation of conditions that might lead to sand production.

The article considers the advantages and limitations of hydraulic fracturing fluid based on carboxymethyl cellulose determined as a result of laboratory studies. As a result of testing the studied fluid manufacturing features compared with similar fracturing fluids it was determined that the fluid of interest can be effectively used as a fluid for formation hydraulic fracturing especially in low permeability reservoirs. This fluid is widely available and has a low cost. It can easily replace the foreign analogues.

Based on the laboratory studies results the advantages and limitations of well killing fluids are discussed. The results showed that neither of the studied fluids is applicable for killing the oil wells with a high gas-oil ratio in the field Novoportovskoye. For this field a new well killing fluid composition has been developed that differs from currently used fluids (the new composition is prepared for a claim on invention). The components of the developed formulation are widely available and are of low cost.

The article considers the history of development of oil and gas resources of seas and oceans, and prospects of the Arctic off-shore fields development. The analysis of the project solutions on development of the off-shore gas and gas-condensate fields in the Tyumen region north has been carried out. The technology solutions are proposed aimed on completion of prospecting wells from the ice islands at time deficit using drill rigs, as well as on completion of wells with using the preventing units.

In this paper a method is presented for gas and gas condensate wells killing in the complicated conditions, that is in the conditions of abnormally low reservoir pressures and with presence of casing string leaks.

The article considers the methods for surface strengthening of screw downhole motors rotors. The automated line and technology for rotors surface coating application are described.

It is stated that the extension of the profitability period of production in the fields that are currently at final stages of development can be ensured thanks to using the mobile compressor units (MCU). The increase of gas production volumes is achieved through intensification of productive rates of the depleted wells as a result of connection of MCUs to the gas gathering network. This enables to increase the capacity of loops, to reduce wellhead pressure and, consequently, to increase the production rates of wells. This article shows the economic and energy efficiency of the hypothetical introduction of the domestic system MCU TAKAT 64.09 M4 UHL1 at the well cluster of the field Vyngapurovskoye.

This work purpose was to develop a method for determination of the effective viscosity of the granulated gel PPG for blocking anthropogenic fractures (auto-FHF fractures) which is applied at later stages of oil fields development. Using the laboratory fracture model the values of constants (apparent constant consistency and the apparent index of pseudoplasticity) for the equation of viscoelastic liquid were obtained. The same constants were used to derive the equation for pressure gradient along the anthropogenic fracture. The gel viscosity is calculated by the equation of gel movement along the fracture. This equation enables to predict the gel viscosity for each size of granulated gel fractions depending on the fracture width and the gel injection velocity.

The paper considers the cycling process as a method of gas condensate fields development by maintaining reservoir pressure through a reverse injection of gas into the productive horizon. The reservoir pressure maintenance impedes the liberation of high boiling hydrocarbons from the reservoir gas occurred due to retrograde condensation, which generate the gas condensate (which otherwise is practically lost). The experience of the cycling process realization proves its high technological and economic efficiency.

The article considers the features of numerical construction of solutions of the Navier-Stokes equations full system describing a three-dimensional flow of compressible viscous heat-conducting gas under the action of gravity and Coriolis forces. It is shown that accounting of dissipative properties of viscosity and thermal conductivity of the moving continuum, even with constant coefficients of viscosity and thermal conductivity, as well as the use of explicit difference scheme calculation imposes significant restrictions on numerical experiments aimed at studying the arising complex flows of gas or liquid. First of all, it is associated with a signifi- cant complication of the system of equations, the restrictions on the value of the calculated steps in space and time, increasing the total computation time. One of the options is proposed of algorithm parallelization of numerical solution of the complete Navier - Stokes equations system in the vertical spatial coordinate. This parallelization option can significantly increase the computing performance and reduce the overall time of counting. A comparison of the results of calculation of one of options of gas flow in the upward swirling flow obtained by serial and parallel programs is presented.

The article describes the automated insulation-cleaning complex as one of the promising methods for repairing the corrosion-resistant coating of the main gas pipelines, which is being developed at present by Tyumen State Oil and Gas University.

The article discusses a change of impact elasticity (a crack resistance or other value characterizing a resistance to rupture) depending on the cutting blade heating temperature. The test results showed that high temperature impact resistance strengthening of the hard alloy blade structure by treatment of its surface with wearresistant refractory titanium nitride coating proved its effectiveness at 500 0C and at 600 0C. At temperature of 900 0C a deterioration occurs resulted from generation of defects in the coating and in the hard alloy surface layer which become the sites of destructive impact crack initiation.

The dependences were obtained which enable to determine the values of the performance factors of gas- turbine units such as gas turbines and axial-flow compressors. The results of testing of the received relations applicability for practical calculations are presented. The test showed the dependences validity for real processes.

In the article there were calculated near-surface concentrations of pollutants in the atmospheric air of Purovsk area, Jamal-Nenets Autonomous region. The purpose was to compare these with the maximum permissible concentration. The geo-ecological maps of dispersion of substances emissions into the air were made up using the unified program for calculating the air pollution taking into account the technical characteristics of sources and emissions themselves, natural, especially climate, conditions, as well as protection urban development activities and the lay of land. The conclusions were made about the excess in the atmosphere of maximum permissible concentration of solids on carbon monoxide in Purovsk, and on nitrogen dioxide in Purovsk, as well as in Ust-Purovsk Tazovskaya Guba permafrost areas.

The effectiveness of the corrosion inhibitor VIKOR used in pipelines with a runin clearance restriction by 75 % and more is investigated. It is shown that the arising cavitation deteriorates the inhibitor layer on the internal surface of a pipeline. To save the pipeline material in the valves areas it is offered to install the sealing rings over the pipe inside diameter.