Hydrogeochemical conditions of the Zapolyarnoye oil and gas condensate field are discussed in the paper. These conditions of Mesozoic basin are important in the formation and preservation of oil and gas deposits. An explanation is given for the presence of the hydrocarbonate-sodium type of waters in the Neocomian hydrogeo-logical complex. It is shown, that the field belong to the Elysion geodynamic a water pressure system - Omsk-Gydansk structural zone, in particular to the northern part - the Yamal-Gydan lineaments.

Layering of the Lower-Berezovskaya subformation in Western Siberia was made on the basis of alterna-tive stratigraphic layering conception of Upper Cretaceous sediments, geological and lithological structure models of the sediments based on sections data from well logging were made.

Common method of accounting for the deterioration of the filtration properties of the reservoir is the in-troduction of a dimensionless coefficient - skin factor. Traditionally, in order to determine the value of skin factor hydrodynamic research methods (well test) at non-stationary modes are applied (pressure recovery curve, level recovery curve) are used. In recent years, along with the pressure in well logging, bottom hole temperature dynamics is also recorded, that allows to use this data for obtaining the additional information about the reservoir and is a slower process, also about near wellbore zone. In this paper the possibility of de-termining the radius of the zone of permeability deterioration in the near wellbore zone from the non-stationary temperature measurements in well is studied; and also the sensitivity of the inverse problem solution to variation of simulation parameters.

In the paper the mathematical formulation of a task of temperature filed in the wellbore and reservoir sys-tem with multiphase fluid filtration is considered. The mathematical models of two-phase non-isothermal filtration of fluid in porous media are described, which take into account non-stationary thermo hydrodynamic processes, barothermic effect, oil degassing when reservoir pressure lowers below saturation pressure. The mathematical models are developed for two-phase flow in vertical wellbore. The paper shows the results of numerical solution of formation of temperature field in reservoir and wellbore system and testing results on analytical solutions.

The features of the geological structure and oil and gas potential of the Bazhenov-Abalak oil and gas complex are discussed. Based on new geological and seismic data, using an integrated approach, the zones of distribution and the boundaries of thinning out of silty sand reservoir rocks of Vogulkinskaya strata were mapped, four traps and two zones (Ourinskaya, Eastern Tolumskaya), which are perspective for hydrocarbon deposits search, were distinguished. In Bazhenov horizon, the zones of development of anomalous sections and bituminous sediments were mapped, laying above Bazhenov formation, which are perspective for hydrocarbon deposits search. Recommendations for further exploration are given.

Based on pyrolytic data (3 995 samples from 208 wells) organic matter types of Bazhenov Formation are identified in the central part of Western Siberian basin. Zones of kerogen types I, II, III and mixed I-II and II-III are mapped. Content of sulfur, paraffins, resins and asphaltenes, viscosity, density, temperature and gas content in oils from Upper Jurassic and Lower Cretaceous sediments (3 806 oil pools) are mapped. Oil gradations are identified and distributed. The alternative model of zones of kerogen II and IIS types is presented. The established distributions of organic matter types can be used in basin modeling and in assessment of oil-and-gas bearing prospects.

Secondary changes in reservoir rocks in the territory of Western Siberia have a regional distribution pattern, and the amount of oil and gas resources, that are in these zones, reaches 30 % of their total number. Part of the objects where the secondary changes are most clearly manifested, has not yet been introduced into the development, what requires a more detailed approach to planning and conducting geological exploration work in perspective areas, where pore space is modified by secondary processes. In this work the main factors that control the distribution of the main types of secondary changes in reservoir rocks were identified: lithofacies, chemical and tectonic.

There was shown the low efficiency of standard well logging sequence for reservoirs identification and de-fining their saturation in the well, penetrating on polymer-clay-based drilling mud the section with high salinity of formation water. At low resistances of formations the reliable results of testing as for large volume reservoirs as well as for small volume reservoirs are needed for establishing the critical values of indications of induction method and electrical measurements against the permeable formations of different thickness. To distinguish the reservoirs it is necessary to obtain the core samples and to analyze them to establish the compliance of indications between geophysical measurements and reservoir characteristics.

This paper discusses the results of physic-chemical studies and the impact of the size of the dispersed particles in the manifestation of some metals in the ore minerals. With this purpose the samples of ore minerals from deposits Sary-Jaz ore area of Berkutskaya group were subjected to crushing to the minimum size in cus-tomized crushing installation. At this by the results of spectral analysis was determined the increase of quantitative metal content in the composition of the finest crushed sample compared to coarse crushing of raw material, especially an increase in the amount of silver in the 10-fold amount is observed.

In the presented work the features of the geological structure and oil and gas potential of the pre-Jurassic basement rocks are discussed. In the sediments of the oil and gas bearing horizon of zone of contact five types of reservoir rocks are distinguished. The greatest prospects for oil and gas potential are associated with the carbonate depositions of the Middle Paleozoic and effusive of the medium-acidic composition of the Permian-Triassic and Triassic age. From these deposits in the territory of the district the maximum oil inflows were received. 15 promising zones of oil and gas accumulation in the deposits of the oil and gas bearing horizon of zone of contact were distinguished, three of which are poorly studied by drilling and one zone (Predeniseyskaya) is in the Paleozoic oil and gas complex.

The current methods of measuring of parameters of the movement of the drill string are reviewed. The as-sessment of these methods from the point of view of metrology and the effectiveness of the application of measuring equipment is given. There are presented the block diagrams of devices for measuring the parameters of movement of the drill string on the angle of rotation of the drill winch drum with automatic correction of measurement errors arising due to changes in the radius of cable winding on winch drum, when winding from one layer to another. Diagrams of mechanical and electrical devices for automatic correction of measurement errors are presented.

The article presents the main causes of water and sand production in oil wells, the consequences of forma-tion of sand plugs and also the methods of prevention of this type of problem. The authors developed the method of reduction of sand production in oil wells. The distinguishing feature of developed method from known ones is the creation of sand filter directly inside the oil well. For effective selection of proppants as applied to geological and physical conditions of wells the authors developed a software «Proppants», which is a database on physical and mechanical and filtration properties of proppants.

The thermal model of the well after switching off the flow of drilling mud is considered. The received results are auxiliary for formulation of the general model. The general model in conjunction with temperature data of drilling mud on a surface will allow to reveal layers of the hydrocarbons, penetrated earlier with drilling.

The mathematical model of the process of gas hydrate decomposition information to gas and ice is pro-posed. This model takes into account the non-isothermal filtration flow of gas, the adiabatic cooling effect, real gas properties, and Joule-Thomson effect. The influence of bottom hole pressure, permeability of a porous medium, and hydrate saturation on the rate of gas production from the reservoir initially saturated with methane and its hydrate was analyzed.

At late stage of development of gas fields they need to solve the specific issues of increasing the production rate of wells and decreasing water cut. The available experience of development of gas and gas condensate fields proves, that the most effective method of removing of water, accumulating in wells, is an injection into the bottom hole zone of foam-forming compositions, based on surfactants. The most technological in the application was the use of solid and liquid surfactants. Installation in wells of lift columns of smaller diameter ensured the removal of liquid from the bottom hole of wells, but after few month of exploitation the conditions of removal of liquid from the bottom hole of wells deteriorate. The technologies of concentric lift systems and plunger-lift systems are used in small number of wells. The basic technology for removal of liquid from bottom hole of gas wells at present time is the technology of treatment of bottom hole of wells with solid surfactants.

The trends of the basic indicators of oil and gas production and export in Russia based on the statistical data were analyzed. The chain and basic absolute increments, growth rates and increments were identified. On the basis of general indicators of the dynamics of development of the oil and gas industry the average characteristics were determined. The perspective of development of oil and gas industry in the country was estimated.

Hydraulic fracturing is used to significantly improve well productivity, particularly in reservoirs with low permeability. In carrying out this operation in the reservoir creates a large branched system of cracks. Increase filtration connection of the wells to remote areas. This article will present the results of numerical solution of the problem related to the definition of increasing the productivity of vertical wells after hydraulic fracturing, with infinite conductivity fracture. As a result, productivity index increases with penetration ratio distance for all aspect ratios.

In the block systems of water flooding the features of relative location of injection and production wells allow for the variety of options for changing the mode of operation (single, group, block, etc.). The greatest overall effect of the change in filtration velocity at the cutting line, and hence also the effect of pulsed non-stationary flooding, is achieved by alternate stopping of wells. The maximum distance between the injection wells, the mode of operation of which can be changed at the same time, is limited by the duration of the stop and subsequent water injection. Thus, if the duration of half cycles is the same, then this ratio is equal to two, that is the wells in a row should be stopped through one row.

The article considers ways to solve the problem of efficiency of formation waterflooding with heavy oil by applying technology of polymer and alkaline (surfactant) flooding on the example of the layer PK1-3 of the Vostochno-Messoyakhskoye field. At high viscosity difference between displaced and displacing agents, the displacement front is unstable and formed breakthroughs water. The situation is worsened by the fact that the geology of the reservoir is extremely heterogeneous in properties, which intensifies the nonuniformity of the displacement front of oil by water.

Complex flows of a viscous compressible heat-conducting gas in ascending swirling flows have a pro-nounced axial symmetry. Therefore, for the numerical solution of the complete system of Navier - Stokes equations to describe such gas flows, it is desirable to use a cylindrical coordinate system. The paper describes the transformation of the energy equation for a complete system of Navier - Stokes equations with allowance for the dissipative properties of a moving continuous medium. The result of the transformation is the formulation of the energy equation in a cylindrical coordinate system.

There were obtained the values of the relative reactivity of different types of bonds in interaction with hydrogen atoms, methyl radicals, as well as values of the effective relative reactivity when using an inert diluent, enabling to improve knowledge about the pyrolysis of raw materials of a given composition. A method was developed for increasing the selectivity of the pyrolysis for the desired products of the process (lower olefins), reducing the yield of liquid products of condensation and specific energy consumption, based on the influence of hydrogen on the thermal reactions of alkanes and alkenes.

Not only climatic conditions exert a negative impact on human health, but also the environment, on which the industrial enterprises, excessive use of mineral fertilizers, motor transport impose the negative impact. Intensive rates of degradation of the environment create real threat to human existence. This problem in areas of the Far North is especially strongly expressed.

Processing and utilization of oil reservoir type is an important environmental and economic problem [2]. Currently in the oil pits in various oil refining enterprises have accumulated hundreds of millions of tons of toxic sludge. This situation poses a real threat to the biological system of the Earth, as crude oil is polymer recycling, which after processing leaves degradation products unknown to science.

In the paper the possibility of use of computational modeling for prediction of processes of phase transformation by example of small series of Fe-Ni-Co alloys has been shown. Due to complexity of structure for-mation processes in these alloys the relation between modeling and experimental work was described. Modeling allows to predict basic transformations in alloys, but it doesn`t display the real composition of structural components.