A new option of stratigraphic disjunction of the Lower Jurassic deposits in the section of Tota-Yakhinskaya 25 well is offered. A substantiation of the proposed stratification option is presented and its comparison with other researchers’ works is made. A conclusion is drawn about a significant influence of the Kiterbyuit horizon position variation upon the estimation of oil-and-gas content in the entire Lower Jurassic series within the Gydan peninsula.

The paper discusses the main causes of inclined oil-water contacts occurrence in the deposits Strezhevskoye and Krapivinskoe of the West Siberian plate, confined to the deposits of Vasyugan formation. The authors believe that the main reasons for the inclined oil-water contacts occurrence are the heterogeneity of the reservoir rocks lithofacies characteristics, regional hydrodynamic pressure of reservoir waters and the imposed catagenesis during the oil deposits formation. For this purpose, the facial analysis of the productive deposits was conducted and the data on reservoir permeability were used.

The paper presents a method for arrangement the oil and gas wells overhaul repair with attraction of service companies and proves the effectiveness of the proposed scheme of jobs organization and gives a determination of well work-over services.

The issues of operation of wells with gas-showings in the Extreme North oil fields are considered. Some possible ways to ensure such wells safe operation are offered and substantiated allowing for the experience gained in solving the problems caused by the annulus pressures. The new innovation technological solution proposed by the author is aimed at ensuring the fire safety and preventing the annulus blowouts during a well construction and operation.

The article considers the issues related with operations aimed at water isolation in Cenomanian wells. The analysis of methods of water isolation jobs including creation of technological screens and hydrophobization of the productive bed was carried out. It is pointed out that in the conditions of gas production decline and the reservoir pressure drawdown some methods can be used designed for prevention of reservoir water influx in the gas wells. These methods are described in the article.

The results of studies of the mud cake effect on cement stone adhesion with reservoir rock are presented. A mechanism of overflows formation in the areas of the cement stone-reservoir rock contact has been determined. Some recommendations are proposed aimed at reducing the tubing-casing annulus overflows in a well.

The ultimate goal of this paper is to develop a method to to determine the pelletized gel pressure gradient, PPG, in fractures resulted from FHF applied at later stages of oil fields development. Using the laboratory fracture model the values of constants (apparent constant of consistency and apparent index of pseudoductility) for viscoplastic fluid equation were obtained. These constants were also used in the derived equation for pressure gradient along the induced fracture. The gel pressure gradient was calculated by the equation of gel movement along the fracture. This equation enables to calculate the pressure gradient for each size of pelletized gel granules depending on the fracture width and the gel injection rate.

The author as a member of the Program Committee of SPE Russian Petroleum Technology Conference, held in Moscow, 26-28 October, shares his impressions on discussions, different opinions on the petroleum sector development in today tough times of low oil prices, delivered at the Conference. The key problem discussed at Conference is an acute need in the innovative way of development. This way importance was empha120 sized by all speakers, foreign and Russian. Together with this, the major Russian operators announced about a reduction of the programs aimed at investigations and development of new technologies for oil recovery enhancement and introduction of unconventional resources into development. The opportunities of various Funds and Universities science with regard to development of innovative, breakthrough technologies in the petroleum industry are considered.

A method is proposed for identifying the well caused the pad flooding in the active operating well stock for locating the interval of water-influx interlayer in order to perform water isolation jobs based on the diagnostics of the producing formation current model. The searching for the pad flooding well is run in three steps: 1) Locating the group of potential wells capable to flood a pad based on estimation of the vapor phase, dynamic characteristics (velocity, flow rate), collection of dropping liquid samples for determination of additional water salinity. 2) Running the monitoring studies of the selected group of wells under the conditions variation (pressure depression) for identifying a well in this group producing with additional water and effecting the gas flow rates in the adjacent wells, the observation system offered being run without the wells shutin with a fast coverage of the entire well stock and with a higher reliability, ensuring safety and cost efficiency. 3) Performing the wide-range spectral neutron gamma-ray logging for diagnostics of the current model of the producing formation based on which the active water-influx intervals and their filtration-capacity properties can be identified to choose a way to perform the water isolation operations.

The approximate solutions of Gretz - Nusselt problem are provided in the article. For these solutions their application range and a definition of errors occurred at solving the differential equation of energy are given.

The article reviews the world experience of technological diversification in the fuel hydrocarbons production sphere. It is shown that the lost classical technologies, such as coals destructive hydrogenation and coals gasification, are reviving on a new technology basis. Some technological methods of receiving liquid fuels from biomass of various origin are analyzed. The technological schemes of production of biofuels of three generations using a natural vegetable material, various productions wastes, as well as biomass of water organisms as a carbon source are presented. The estimation was made of production outputs and costs of synthetic fuels (dimethyl ether, biodimethyl ether, biodiesel, gasoline and others). The conditions for development of biofuel technologies were formulated.

It is shown that pyrolysis process selectivity for ethylene can be increased at decreasing the condensation products output and suppressing the formation of pyrocarbon by adding 2 % hydrogen mass to the raw material. It is also proved that increasing the pyrolysis process efficiency is possible when propane fraction containing propadiene is recirculated into the pyrolysis raw material, which accelerates the process at low temperatures and suppresses the output of condensation products.

The authors consider the problem of developing oilfield chemicals of complex action on the example of preparation of a composite from chemicals of different process action (demulsifiers for water-oil emulsions and metal corrosion inhibitors). Unlike the common practice of empirical selection of reagents for evaluation of their action effectiveness in the technological process the offered approaches are based on the possibility of reagents selection using the inductive dielectric method. It was found that the peaks tgδ, detected by the inductive method, the most suitable for using in the complex-action composite technologically compatible oilfield chemicals, should be observed at almost equal in value frequencies. It was shown that the developed mixture of a demulsifier with a corrosion inhibitor simultaneously exhibits much higher efficiency as a corrosion inhibitor and a demulsifier, i.e. the mixture obtained is a complex-action agent.

The qualitative and quantitative analysis of distribution of structural components (-phase + graphite) in the carbon-containing invar alloy with 0,6% C was conducted. It is demonstrated that velocity of crystallization produces a strong influence on the dispersion of graphite and on the volume fraction of graphite components in the alloy, i.e. at faster cooling the graphite volume fraction and its dispersion are noticeably higher than at slower cooling. The linear thermal expansion coefficient of both slowly cooled and fast cooled alloys maintains its values constant at heating temperatures lower 200 oC. However, in the alloy received as a result of fast cooling this coefficient values are lower than at slow cooling which can be explained by a lower content of carbon in the -phase, being a carrier of invar properties, of the slowly cooled alloy.

A procedure is offered for recalculation of values of the centrifugal natural gas injectors’ basic parameters characterizing the technological capabilities of these machines and their performance efficiency. The recalculation is based on the data on the machines current technical state. This procedure use allows for operating the injectors more rationally with the account of their actual state and thus improving the cost/performance ratios of gas-transporting systems.

The necessity of development of a fireproof compound for protective facilities metal constructions of oil-and-gas wells is proved in the article. The technique and algorithm of designing the fireproof compositions are described.

A share of the flashed mass of the light hydrocarbons broad fraction and the evaporation rate of the remaining fluid portion at different material storage temperature and ambient temperature is estimated in the paper. It was found out that a drop of the storage temperature and ambient temperature impedes the vapor phase generation and thereby reduces the geometrical dimensions of dangerous zones by all factors of impact.

The article describes the problems of reclamation of lands contaminated by wells construction, operation and abandonment which is part and parcel of activities related with oil and gas field development. It is emphasized that the land resources restoration includes technical and biological reclamation and measures aimed at restoration of flora and fauna, at tundra native population life support.

A research and comparison of natural and damaged (due to the active development of oil and gas fields) permafrost soils in the Jamalo-Nenets Autonomous Okrug were carried out. The analysis was run of correlation between an average monthly temperature of air, an average monthly sum of precipitation, the weight humidity and the thickness of the seasonal thawed layer. The conclusions were drawn about a poor resistance of landscapes on the permafrost rocks to the anthropogenic interventions, which in its turn is accompanied by the cryogenic processes and unfavorable influences on the Extreme North biosphere.

The article considers the problems of anthropogenic environmental pollution in the oil and gas fields in West Siberia. Taking into account the experience of wells drilling and statistical reports data there was drawn a map of average many-years pollution of open water bodies in Khanty-Mansi Autonomous Okrug. It is shown that the major pollution is related with drilling wastes in the process of increasing the volumes of drilling and oil and gas production. To reduce the pollution it is offered to use modular plants for treatment of waste waters of BT and BTF type. These plants use will permit to discharge the treated waste waters into the water bodies of fishery purpose.

Static model of the distillation column installation of primary oil refining is designed. The algorithm of BP-method in mathematical package Matlabis realized. For representing the composition of the oil, kind of curve fitting the true boiling point (CTI) of oil from the experimental data is determined.