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#4/2018

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Revision of the collectors filtration properties in order to increase the geological model reliability of the Achimov formations at one of the deposits in Western Siberian oil and gas basin
O.A. Bogdanov, P.S. Maglevannaya, S.A. Ivanov, A.O. Bogdanov

Key words: reservoir properties, well log interpretation, core, geological simulation, Achimov formations

Abstract
Geological composition complexity of the Achimov formations in Western Siberian basin results in a highly complicated process of defining reservoir properties and geological and hydrodynamic simulation.
Specification of porosity and permeability along with classification of reservoirs was held to solve this
problem. This made it possible to improve the geological model of the Achimov formations in selected
field located the northern part of the Western Siberian basin. Zones of high-permeability reservoirs distribution was identified based on results of study.

Development particularities of the Northern oil and gas fields in the conditions of propagating permafrost and gas hydrate rocks

K.A. Polozkov, A.V. Polozkov, V.A. Derbenev, D.A. Astafev, A.V. Sutyrin

Key words: Development of the Northern deposits, permafrost formation, gas hydrate rocks, lowtemperature sections, studies of low-temperature sections, forecasted gas-hydrate gas resources, construction and operation of wells, complications, technologies, research methods.

Abstract
At present, the main production of hydrocarbons in Russia is carried out in the northern regions located in difficult climatic conditions with the propagation of permafrost and gas hydrate rocks in the section.
Deposits development in such conditions requires a detailed study of deep geocryological conditions, including identify intervals of gas hydrate rocks occurrence, because being neglected when choosing technologies for the construction of wells they can result in a number of complications and accidents.
At present, the presence of gas hydrate formations in low-temperature sections is not always taken into account in projects for the construction and operation of wells.
At the same time, gas hydrates are currently referred to as promising resources, the development of which will begin when conventional gas resources deplete. Even now, when developing conventional deposits, it is possible to forecast the gas hydrate gas resources based on the interpretation of geophysical and other field data.
The article summarizes the accumulated research experience of the intervals of gas hydrate reservoirs occurrence and an initial assessment of the forecasted gas hydrate resources in several largest northern oil and gas fields.

Preparation of one-dimensional geomechanical models of coalbed methane deposits according to test data from core and exploration wells
A. Shevtsov

Key words: coalbed methane, geomechanical simulation, stress-strain state, well logging, hydrodynamic well testing, mini-hydraulic fracturing

Abstract
The paper presents the technique of preparing one-dimensional geomechanical models according to wells testing, obtained during the period of geological exploration and pilot-industrial activity at coalbed methane deposits. Distinctions of preparation of one-dimensional geomechanical models of coalbed methane deposits from the models for conventional oil and gas fields are noted. The results of the preparation of a one-dimensional geomechanical model according to one of the exploration wells of the Naryksko-Ostashkinskoye coalbed methane deposit in Kuzbass are presented. The results obtained allow us to conclude that the tectonic stresses had a minor impact on the rock mass under study and that the relationship between horizontal stresses and the formation pressure in the rock massif needs a more detailed study.

On the integrated approach to the problems of appropriate hydrodynamic simulation of a field development processes on the example of Chayandinskoye oil and gas condensate field
B.A. Grigoriev, S.G. Rassokhin, I.A. Zinchenko, A.L. Kovalev, I.Yu. Korchazhkina, V.M. Troitsky, E.L. Fomin

Key words: physical, hydrodynamic, sector simulation, oil displacement agents, agents efficiency analysis 

Abstract
The paper presents a methodical approach to the problems of the oil rims development from a physical experiment to an appropriate sector simulation and evaluation of the technological characteristics of the development.
With the help of modern precision equipment, experimental studies have been carried out in reservoir models under thermobaric conditions of the Chayandinskoye oil and gas condensate field. The obtained filtration characteristics were used for adapting the hydrodynamic model on two landfills related to the oilwater (landfill No.1) and below-the-gas-cap (landfill No. 2) zones of the oil rim of the Botuobinsky level.
Adapted hydrodynamic model made it possible to carry out multivariate calculations of oil production using the technologies of injecting water, separator gas, nitrogen, carbon dioxide, polyacrylamide solution, as well as water-gas impact technology, and evaluate the efficiency of these displacing agents at sites 1 and 2.

Development of a highly stable killing fluid based on condensable solid phase compositions
R.A.Gasumov, S.V. Kostyukov

Key words: killing fluid, well workover, well killing, condensable solid phase, gas well 

Abstract
The article presents the results of laboratory studies for killing fluids with condensable solid phase based on calcium compounds. The features of such systems are identified and their positive characteristics are determined, which made it possible to conclude that they are promising as killing fluids for use in wells under complex mining and geological conditions. As a result of the laboratory data analysis it was found that a change in the solids content most significantly affects the rheological and filtration properties as well as stability of killing fluids based on condensable dispersions. The optimal concentrations for solid phase to obtain a killing fluid with high technological parameters are determined.

On the estimation of the efficiency of the degassing of a coal seam on the basis of the determination of its residual gas content
O.V. Taylakov, A.N. Kormin,

Key words: gas content of coal seams, methane, mining, desorption 

Abstract
The features of determining the gas content of coal seams based on the selection of coal samples in the mine workings of coal mines are presented. The dependence of core gas exhaustion in time in the process of filtration and diffusion of methane is established. The linear dependence of the gas content in coal on the yield of volatile substances was revealed. The results of measurements of methane volumes desorbed from coal cores are presented, on the basis of which the efficiency of coal seam degassing is evaluated.

Expert and multi-criteria assessments when developing coalbed methane deposits
Yu.P. Stepin, V.V. Strelchenko

Key words: multi-criteria assessment, risk, base scale, hierarchy analysis process, rating scale, coalbed methane field

Abstract
The article is devoted to solving problems of a multi-criteria assessment of the promising outlook of coalbed methane deposits under conditions of uncertainty and risk. An expert procedure is proposed for the formation of a list of criteria (geological, technological, economic) that describe the prospects of field development options, their ranking and selection of the most significant ones. Applying the basescale method and hierarchy analysis process, a model is proposed for calculating the preference of field development options through their multi-criteria comparison (ranking) for the most significant criteria of development options identified at the previous stage.

The choice of the state equation for simulating natural gas liquefaction 
S.A. Sirotin, A.V. Mamaev, D.P. Kopsha, 

Key words: gas, natural gas, processing, processing of natural gas, natural gas liquefaction, equation of state, phase equilibrium.

Abstract
The modern and the largest and most efficient producers of liquefied natural gas are based on precise empirical dependencies of the phase equilibrium processes of natural gas components. Most of the world leading companies that possess natural gas liquefaction technologies have their own experimental data and developments in the field of exact calculations and methods for modeling the phase equilibrium processes of multicomponent gas mixtures. Therefore, for the development of this area in Russia, it is important to develop techniques for exact simulation the processes of natural gas liquefaction.
The subject of this paper is the study of the phase equilibrium of multicomponent gas mixtures that form the basis of natural gas. A comparative analysis of the phase equilibrium of natural gas was carried out on the basis of the Peng-Robinson and Redlich-Kwong cubic equations of state modified by S.D. Barsuk for natural gas liquefaction.

The method to substantiate the pipeline shut-off gate valve service life based on the provisions of experimental physics of the destruction of structural materials in the nuclear, gas and related industries.
A.Yu. Antonov, V.S. Rubtsov, I.A. Tutnov, I.A. Shpara

Key words: industrial safety, gas pipeline, shut-off valves, experimental physics, destruction, service life, expertise

Abstract
The paper presents an original method for assessing the actual service life of large shut-off valve bodies for the study of industrial safety of pipeline network elements. A method is proposed for justifying the safety guarantees of gas pipeline shut-off valves during their long-term operation, which takes into account the main factors of experimental physics about structural material damage. An information model of the method, an example of calculation, the prospect of applying the proposed method of experimental physics to improve the quality of industrial safety expertise of gas pipeline networks is given.

Expansion of the Eastern Siberia-Pacific Ocean oil pipeline (geoecological and geotechnical aspects)
M.N. Zheleznyak, S.I.Serikov, M.M. Schatz, 

Key words: high seismicity; the complex nature of the development of frozen rocks; geocryological criteria; Permafrost rocks, stability of geosystems.

Abstract
The paper highlights the complex environment in the zone of influence of the Eastern Siberia-Pacific Ocean oil pipeline, which is characterized by high seismicity and the complex of permafrost and geotechnical features of the system created and operated applying the state-of-the-art technologies.
It is shown that the various challenges associated with complex engineering-geological conditions of the pipeline route and the uniqueness of the pipe transition over one of the largest Siberian rivers Lena were successfully resolved by time of operation begins. The necessity of mandatory for all stages of geotechnical monitoring is noted.

Prospects for the use of energy storage units in the power supply systems of hydrocarbons production and transportation companies
A.D. Minin, V.A. Karasevich, A.G. Saltanov

Key words: power supply of hydrocarbon production and transportation facilities, self-contained power sources, renewable energy sources, energy storage

Abstract
The article discusses the role, options and prospects for the use of energy storage devices for electric power plants at hydrocarbon production and transportation facilities.

 
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