Hydrogeodynamic and hydrogeochemical conditions of the Lower-Middle Jurassic complex are considered on the example of the oil field Talinskoye located in Krasnoleninsk oil and gas bearing area. The authors describe the complicated structures of the hydrogeodynamic and hydrogeochemical fields in the studied area. It is shown that the deficit reservoir pressure is in average 1.6 MPa. Within the field the zones of the waters ion-salt composition anomalies have been are identified. These zones are characterized by low values of mineralization (in average 5 g/l) as compared to the background value (8 - 9 g/l). The dependence of the hydrogeochemical anomalies formation on the faults position, the temperature of the basement top and the values of reservoir pressures is consistent with the model of the conjugated falling-rising mass transfer.

It is proposed on the basis of special technologies use to ensure a multiple reduction of exploration and development costs at significant increasing the production volumes. This is achieved by optimizing the placement of exploration and production wells in the immediate vicinity of the centers of geosoliton degassing of the Earth.

In the article the results of the detailed subdivision of the Nizhnekozhevnikovian and Verkhnekozhevnikovian series of Permian age are presented based on the well survey, core and drilling cuttings lithology description data. It was defined that the identified prospective horizons were spread out all over the Anabar-Khatanga oil-and-gas-bearing region. It is concluded that the horizons in the upper part of each series may be considered as the most prospective, that was proved by the lithology composition based on well logging and by the results of productive formations testing run in a number of areas.

In the article the geologic structure of the Jurassic and Neocomian age sedimentary cover in the Yamal Peninsula is considered. The regional unconformities of the north-east strike where the traps of barrier type are formed and the petroleum potential of which has been proved in Novoportovskoye, Rostovtelecoye and in a number of other fields have been mapped.

It is demonstrated that study of the theoretical conceptions of the lithosphere dynamic tension zones and their application to the specific geological conditions of individual geostructures leads to very interesting results in terms of practice. In this case to study the impact of dynamic tension zones on construction and operation of various industrial and civil engineering facilities is of great importance.

Drilling of oil and gas wells is a time consuming, very complex process in which there occur all sorts of complications. The most common one is drilling mud loss. During drilling of wells the control of this fluid loss problem takes about 12 % of total time. In this case, up to 60 % of materials and time is spent on isolation of fractured-cavernous beds with high fluid loss intensity which make up only 10 % of the total number of isolated zones. The use of liners with welded and threaded connections of shaped tubes enabled to completely solve the problem of lost circulation zones isolation regardless of their thickness, the borehole caving and the fluid loss intensity.

In the article principal problems of Cenomanian gas reservoirs exploitation on the last stage are considered. On the base of primary data analysis the dependence of a gas saturation factor from vertical reservoir location against gas water contact is determined which has influence on the gas well exploitation method. The necessity of maintenance of a net gas pay in a productive layer remaining the same during water shutoff treatment is proved. A new approach for realization of water shutoff treatment within low-pressure gases exploitation is justified.

The frequency of oscillations appearing during the electrical centrifugal pump operation is related with the rotor rotation frequency and is actually constant. To reduce the vibration of the constructions critical components the dynamic dampers are often used when vibration is transferred from the protected machine to the auxiliary assembly which vibration poses no danger to the system as a whole. The paper discusses the possibilities of this idea implementation for protection of the electrical centrifugal unit and presents three possible options for consideration.

The waterflooding process is provided by the technical hydraulic system (THS) of reservoir pressure maintenance, including water intake facilities, treatment systems, pumping stations, pipeline network, shut-off and throttling valves, wellhead equipment of injectors, drained (by boreholes) and flooded (by injection wells) zones of the formation or the system as a whole. The obvious THS interconnection with the productive strata system required a creation of the THS model and the model of productive strata hydraulic system, which should be integrated into a comprehensive model. In the sphere of simulation of hydraulic systems at present there is no theoretical basis formed for building unified hydraulic models related to productive strata systems. Also, there is no unified approach to the mathematical and algorithmic description of models of hydraulic systems with arbitrary properties of elements, due to which the created models and their software implementations are used exclusively in the industry context with large restrictions on description of the properties of the system elements and the boundary conditions.

Using the NMR method with a pulsed magnetic field gradient the features of crude oil self-diffusion were investigated on samples of oil from the Tula horizon, the oil field Yamashinskoye. It was found that the samples were characterized by a complicated (non-exponential) form of diffusion attenuation of the NMR spin echo amplitude which required the introduction of the concept of effective (average over the entire sample volume) coefficient of selfdiffusion Deff. The temperature dependences of Deff within the temperature range 303-363 K are satisfactorily described by the equation of Arrhenius type equation which enabled to determine the values of self-diffusion activation energy ED in the studied systems. The correlation between the parameters of the studied systems self-diffusion, Deff, ED and their dynamic viscosity was found.

Тhe Article is devoted research of features of development of new wells in Riphean carbonate reservoirs. The results of study of composition and physical parameters of rocks of the developed objects.The analysis of technologies call flow of fluids from reservoirs and exploration wells. On the basis of hydrodynamic researches of wells demonstrates the use of new technologies of well completion with the use of the modified acid treatment and composition of process fluids. The results of field tests of modified technologies.

The article is devoted to numerical, laboratory and experimental substantiation of the cyclical impact on the productive formations with high-viscosity oil. On the basis of rheological and filtration studies examined the mobility of the oil, including its thixotropy properties. According to the results of numerical simulation determined the optimal half-cycles of water injection.

The paper considers the issue of development of the drilling fluid based on the sapropel-alkaline solution possessing specific flow properties. The results of the conducted research showed a prospectivity of using sapropel as a dispersed phase of drilling fluids.

The samples of core from the well in West-Novomostovsk oil field, Krasnoleninsk petroleum bearing area, were analyzed. A complex of core samples petrophysical studies were carried out as well as the laboratory study of capacity and electrical properties of 40 core samples in ambient conditions and in the simulated reservoir conditions. The typical relationships as applied to the in-situ conditions of the studied area wells were obtained.

To assess the possibility of hydrate formation during gas production a mathematical model has been developed. This model takes into account the real properties of gas, the adiabatic and throttling effects. Also, the computer program has been written, which allows calculating the distributions of the main parameters in the productive stratum. The analysis of the bottomhole pressure, permeability and porosity influence on the character of distribution of temperature and pressure in the reservoir has been carried out.

Study of granular gels properties to control the development of oil fields. Ovchinnikova S. V., Ali G. H. The ultimate goal of this work was to develop a method to be used in mature oil fields aimed at plugging the highpermeability water flooded layers with further displacement of oil from the low-permeable interlayers and decreasing the water production. The experimental studies were carried out to assess the influence of different types of PPG gels (30 mesh and 40 mesh) on the injectivity of low permeable rock samples. In this study the permeability of the rock samples was measured before and after the gels injection. The injection of gels was run at different pressures and various concentrations of the brine. Additionally, the influence of the brine concentration on the gels swelling and strength was studied. The gel particle size is in the ranged from 30 to 80 mesh.

Construction of subhorizontal wells in the Achimov deposits. Panikarovski V. V., Panikarovski E. V. In the article reviews the problems that occur in drilling of subhorizontal wells in Achimov deposits. The analysis is made of fractured-cavernous reservoirs development technologies using the water-base mud solutions which do not ensure the qualitative stripping of productive strata and cause a high breakdown rate at implementing drilling operations. It is proved that the hydrocarbon-base solutions are the most perspective solutions for drilling of subhorizontal wells in such conditions.

The article describes the development of the engineering solutions complex adapted to the specific geological and technical conditions aimed at effective completion of bitumen wells. These solutions are based on the whole set of thermal properties of the reservoir.

Oil pools developed by PJSC «Tatneft» are mainly confined to the Devonian deposits, the top of which is represented by Kynovsk argillites. The construction of a horizontal wellbore in the Upper Devonian terrigenous strata (D0) is complicated by the geological structure of this complex, which leads to complications related with maintaining aborehole stability. The results of the proposed complex drilling fluid AGNI-Drill study prove its effectiveness in drilling wells to the complicated areas.

The article is devoted to the problem of increasing the efficiency of high viscosity oil recovery from low permeable beds.

Sophisticated viscous compressible heat-conducting gases arising during heating the vertical field, have a pronounced axial symmetry. Therefore, for the numerical solution of the full Navier - Stokes equations to describe such gas flows is advisable to use a cylindrical coordinate system. This paper describes the transformation of the first equation of the full Navier - Stokes equations. The result of the transformation is to write the continuity equation in the cylindrical coordinate system.

The aim of this thesis is to develop computer program shows generating process of the longitudinal-crowned gear for straight bevel gears with a small shaft angle with non-generated gear and generated pinion. The purpose of computer program is the simulation of meshing and contact of the gear tooth surface with longitudinal crowning and straight pinion tooth surface with localized bearing contact.

It is stated that fire protection of facilities for oil and petrochemical industries is greatly facilitated by using foams with a different multiplicity factor as a tool for fighting fires. The main aspects of the inert gases influence on the foam stability, a multiplicity factor and the time of its complete destruction are studied. It is shown that when using the inert gas as an additive, the foam stability and the time of its collapse increase. It is also found that when adding an inert gas to the foaming agent the time of the foam complete destruction is doubled.