The author suggests and describes the most optimal, reliable method for modeling saturation of the productive oil reservoirs The method takes into account the impact of capillary forces in porous media, water-oil transition zone. This method most fully meets the modern requirements of threedimensional geological and hydrodynamic modeling.

The uniqueness of fresh underground waters of the cryolithozone in the West Siberia north used for drinking purposes is in their low ultra-fresh mineralization. These waters even in the absence of the anthropogenic pollution negatively affect the population’s health. It is proved that natural factors play a significant role in these waters composition formation. Therefore, these factors in-depth study becomes the most important task of researches.

In this work a method is proposed for estimation of spatial distribution of predicted structural uncertainty.This estimation is made by a deterministic way during the analysis of internal convergence of the seismic method data. The errors in determination of kinematic parameters, namely time and velocity, are estimated. The estimates of external convergence of seismic data with drilling data are taken into account. As a result, a map of standard deviation of structural imaging is calculated which then is used to construct a map of a structural closure probability (risk).

The aspects of ecology safety related to operation of underground fresh waters intake facilities aimed at maintenance of reservoir pressure at development of oil fields are discussed in the article. When speaking about a change of the fresh underground waters state in the process of their use the authors imply the produced water quality degradation (pollution of productive water-bearing intervals); lowering of the water level in the reservoir (damage of hydrodynamic conditions, depression cone formation). The main, most significant factors determining the change, mentioned above, include inadequacy to meet the normative requirements toward the technical condition of wells of different purposes and the adjacent territory, absence of systematic control of the produced water quality and the impact of the produced fluid (water, oil, gas) quantity on the level conditions of the underground fresh waters. The suggested ways for optimization of these factors and the methods of control will permit to improve the ecology safety of the discussed above waters use.

The article deals with the problems occurred at constructing the integrated model, describes the procedures and determines the criteria of these procedures applicability. Some recommendation are offered for optimization of the pilot field development.

In the article the methods are considered related to the gas wells recovery in the conditions of the final stage of the Cenomanian reservoir development characterized by a hydrocarbons production decline due to a number of factors. These factors include the reservoir pressure drop, production water cut increase, degradation of development well stock and conversion of these wells to idle ones and further to their restoring repair. Based on the analysis of traditional workover methods and their low efficiency causes there were developed additional criteria, which indicate the necessity of improvement of the existing well workover methodology.

The article presents the analysis of cone bits sealing system. It shows the perspective directions of increasing the durability of cone bits bearing assembly, improving the reliability of the drill cone bits bearing elements sealing system.

The article discusses the issue dedicated to increasing the effectiveness of the formation hydraulic fracturing (FHF) implemented for the Achimov deposits, Urengoyskoe field, in the conditions of abnormal reservoir pressures. Based on the experience in FHF operations gained in the fields of West Siberia it is proposed to apply as a proppant the non-radioactive marked agent. It is shown that the offered NR proppant technology has proved to be a new and effective tool for estimation of the FHF fracture geometry, as well as a safe means due to absence of the radiation source together with the technological process simplicity and precision of the data obtained.

The articles considers the possibilities to study the directions of water flows in the reservoir during the oil displacement in the systems of formation pressure maintenance. It is proposed to perform simultaneously the studies in development and injection wells. Additionally, to study the field data permitting to establish the time of water breakthrough to the producers

The article analyzes the basic geological and engineering factors of risk which must be taken into account before implementing the repair-isolation operations in oil and gas wells as well as graphical diagnostics of water cut development on the example of wells in the field Povhovskoye. The field-geophysical methods and actuality of hydrodynamic modeling are also discussed.

The authors suggest a solution of the problem of improving the quality of oil and gas wells cementing in the high temperature intervals by using the blast-furnace wastes as granulated slags introduced in the plugging material composition.

It is shown that Upper Cenomanian deposits are considered among the main productive formations for development for gas production. These deposits are presented by poor cemented reservoirs. The problem of Cenomanian wells operation is said to be related with sand production and formation of sand plugs in the borehole which leads to the flow rate decline. According to the authors, realizing certain geological and engineering actions aimed at removing the above damages will enable to maintain the stability of the bottomhole formation zone and prevent a gas production decline. It is mentioned that at present to control sand production a number of physicochemical, mechanical methods or their combinations are applied.

The aim of the work described was to develop a method for selection of a gel. This work involves studying the gel PPG swelling and shrinkage processes. The kinetic curves of PPG swelling and shrinkage in the brine of different concentration will be measured. The effect of the brine temperature and concentration will be analyzed.

This article considers some aspects of application of hydrodynamic models of productive formations in the conditions of their porosity and permeability properties variability. Some features of the calculation results in the conditions of the variable permeability and fracture generation are shown.

The article describes the basic methods of calculation of pressure drop in gas producing wells. There were created 120 models of gas wells producing from Cenomanian deposits in three gas fields. More than one thousand of hydrodynamic calculations of gas flow were performed. The analysis of the results enabled to find a more precise method of calculation of gas flow in development wells, which is believed to permit to improve the geotechnical model precision as well as the effectiveness of decisions made in the field development sphere.

The rectangular parallelepiped explicit difference schemes for the numerical solution of the complete built system of Navier-Stokes equations. These solutions describe the three-dimensional flow of a compressible viscous heat-conducting gas in a rising swirling flows, provided the forces of gravity and Coriolis. This assumes constancy of the coefficient of viscosity and thermal conductivity. The initial conditions are the features that are the exact analytical solution of the complete Navier-Stokes equations. Propose specific boundary conditions under which the upward flow of gas is modeled by blowing through the square hole in the upper surface of the computational domain. A variant of parallelization algorithm for calculating gas dynamic and energy characteristics. The results of calculations of gasdynamic parameters dependency on the speed of the vertical blowing by the time the flow of a steady state flow.

The paper considers the study of oil and water mixing zone at these fluids successive pumping through field pipelines. It was defined that the actual amount of water and oil mixing during these fluids successive pumping through the field pipelines was less compared with the amount of mixing when pumping the oil refining products. This situation was investigated to understand what caused a decrease in mixing intensity as well as a reduction in the mixture amounts at introducing the method of successive pumping from the flooded well.

The article describes derivation of relationships permitting to calculate the temperature of combustion products before the power turbines of gas-turbine engines taking into account a partial return of the lost earlier power of the combustion products in the previous turbines. Using these relationships data significantly improves determination of the gas-turbine engines effective output by their operation data.

The article presents a method developed for modeling the petroleum complex pumping units failure rate and reliability based on Markoff stochastic processes. A procedure is offered for determination of the pump unit’s probabilistic condition based on Markoff models. The ability of using Markoff models as a tool necessary for organizing and implementing the pumps repair and maintenance is demonstrated. The perspectives of the developed methodology use are described.

The article provides an overview of the scientific works aimed at study of the destruction and damage of drilling roller bits cutting structure. The results of the examination of bits, used in field conditions, are presented.It is shown that typical causes of loss of efficiency of drill bits hard-alloy teeth are their destruction as a result of partial chipping of the working surface and the teeth breakdown. It was found that most teeth were destroyed on the middle and peripheral rings. These results correlate well with the results of study of the drill bits cutting structure workload.

The problems of operation of wells suffered from gas shows in the tubing-casing annulus are discussed in the article. It is shown that operation of wells with presence of tubing-casing annulus pressure leads to pollution of the environment and occurrence of open gas blowouts, that is why according to safety rules such operation of wells is not allowed without development of special compensation actions aimed at ensuring the reliability of well constructions, wellheads and at providing the measures for enhanced ecology safety and blowouts prevention. It this connection the development of compensation actions of safety, described in this article, becomes urgent and timely.

The energy strategy of Russia predetermines to bring the level of production of oil with gas condensate up to 445 million tons per year by 2020. This will undoubtedly increase the anthropogenic impact on the environment because these processes will happen in the conditions of aging of facilities of production, processing, refining and transport of hydrocarbon materials. Adherence to the basic directions of rational nature management, stated in this article, will permit not only to eliminate the negative changes occurred in the environment due to the technological processes of FEC enterprises, but also to prevent them.

The paper describes a method of preparation and application of «environmentally friendly» brittle tensosensitive coatings on the basis of caramel.It is found that the coating has good adhesive properties, stable tensosensitivity, a simple technology of preparation and application, and is safe for humans and the environment.

This article describes the studies of oil and gas wells experiencing gas blowouts. Some methods and means aimed at elimination of tubing-casing annulus gas flows in a well are presented. The new means offered ensure fire safety and increase the industrial security as well.