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"Proceedings of Gubkin Russian State University of Oil and Gas" is a collected volume containing leading edge contributions in fundamentals and applications of oil and gas science.

The journal is published quarterly.

The scope of research papers includes the following topics: Geology, Geophysics; Drilling, Development, Production; Transportation, Storage; Processing, Chemistry of Oil and Gas; Computerized Control Systems, Modeling of Oil and Gas Production; Economics, Management.

Subscription index in the "Russian Press" agency: 13166

This publication is the property of Gubkin Russian State University of Oil and Gas and its reproduction by any means without the consent of the University is prohibited.

Recent issue № 3/296, 2019

Influence of inelasticity of environment on AVO analysis in seismic exploration
The absorption effect on AVO is shown. Full wave modeling and qualitative, quantitative analysis of absorption were carried out. Probability density functions of errors in the inversion of elastic parameters were estimated based on the simultaneous inversion
Physical and chemical properties and composition of hydrocarbons (oil, gas, condensate) of fields in the Lena-Tunguska oil and gas province
The physical properties and chemical composition of hydrocarbon fluids in the fields of the Leno-Tunguska province are considered. The noted features of the physicochemical properties and composition of hydrocarbons (oils, condensates, natural gases) reflect the regional patterns of the distribution of types of hydrocarbon fluids both in areas and in sections of the province’s fields. The properties and composition of the hydrocarbons of the selected main oil and gas complexes will allow to reliably predict the expected phase composition of the hydrocarbons in new promising areas
Facies Analysis and Depositional Environments of the Lower Miocene Formations in the Garmian block, Kurdistan, Iraq
The article uses data on the recently discovered oil fields of Sargala and Shakal, in the zone of the Kirkuk basin of the Zagros folded-thrust belt. The Lower Miocene formations (Euphrates and Jeribe) are the target objects of the tertiary oil and gas system in Iraqi Kurdistan, along with the Oli- gocene (Kirkuk). Formations are composed of carbonates with a few interbeds of evaporites of the Dhiban formation. In the framework of this study, 15 facies were identified based on the analysis of faunal residues (mainly benthic foraminifera) and texture-structural characteristics of sedimentary rocks. The facies of the Jeribe formation showed to be deposited of the inner part of the carbonate ramp, while the Dhiban formation corresponds to the conditions of the coastal Sebkha and isolated lagoon and shallow waters of the open sea. The Euphrates Formation was deposited in an open shallow-marine environment to the isolated lagoon
Assessment of the influence of fracturing on the reservoir characteristics at Sarqala field, Zagros fold and thrust belt - Northern Iraq
We consider the fracture modeling on the base of stress inversion model, as a tool for detecting discontinuities in Jeribe/U. Dhiban carbonate reservoir and, consequently, determining prospective areas for drilling wells at Sarqala field, North of Iraq. This method works on the stress heterogeneity caused by the activation of the main faults, and is formalized using the boundary element method in Petrel software
Multiphase pump to control water influx in gas and gas condensate wells
The problem of gas and gas condensate wells flooding was considered. The existing methods of control of the complication were analyzed. The conclu- sion about highest effectivity of artificial lift systems was made. The basic con- figuration of the gas and gas condensate wells equipment for artificial water recovery was discussed. A concept of submersible pump was designed that is able to operate with high gas concentration and large amount of suspended particles
The article is devoted to the analysis of the designs of existing drilling mud pumps and the prospects for the development of new ones. The drive circuits of the pumps by a crank drive mechanism, with an oblique washer, hydraulic actuators and roller screw pumps are analyzed. Examples of structures of mud pumps with a capacity of 950 kW are presented. The advantages and disadvantages of various pump layouts and possible overall and technical characteristics are considered
Study of deposition of droplets of liquid injected into pipeline by gas-liquid nozzles
The article deals with the problem of spraying liquid inside a pipeline using gas-liquid nozzles. When operating a gas-liquid nozzle installed in the pipeline, the formed droplets may deposit on the pipe wall at a distance of several meters from the nozzle, this can make the spraying process ineffective. The article presents the results of experimental studies performed on the stand, which allows evaluating the deposition rate of sprayed liquid on the walls of the pipelines with a diameter of 150, 300 and 500 mm and up to 10 meters long with one or two gas-liquid nozzles. It is shown that the deposition of the sprayed liquid occurs very intensively within the first ten meters from the point of installation of the nozzle: in most cases, more than half of the sprayed liquid is deposited. Tests have shown that the intensity of droplet deposition decreases with increasing pipe diameter and with increasing atomization fineness achieved by increasing the pressure drop of the sprayed gas and increasing the ratio of mass flow rates of gas and liquid. The use of a circuit with two identical nozzles, directed perpendicularly to the flow and towards each other, allows reducing the deposition rate of the sprayed liquid compared to one nozzle placed on the axis of the pipeline, with a pipe diameter of 300 and 500 mm
The paper is devoted to mathematical simulation of carbon dioxide corrosion process. On the base of corrosion characteristics of industrial monitoring data during gas transportation certain regularities were revealed. Theses allowed developing a mathematical model of electrochemical carbon dioxide corrosion by the parametric method
Technology of trunkline underwater crossing construction and overhaul temporary water retaining barrages
The article contains stepwise description of the technology of trunkline underwater crossing construction and overhaul with temporary water retaining barrages. In addition, the block diagram of choosing the water retaining barrage type for the pipeline right-of-way conditions is presented
Determination of maximum allowable amount of imbalance of natural gas supplied to consumers
A methodology for optimizing the process of forming the supplier’s gas balance by clarifying the balance model and adding a special balance correction for the uncertainty of measuring instruments is suggested. The calculation of the correction introduced into the balance model based on the laws of mathematical statistics is substantiated, and the main advantages of its application for the natural gas supplier are proved
Features of the calculated determination of the parameters of the stress-strain state of gas pipelines in complex engineering-geological conditions
The article deals with the problem of construction and operation of CNG stations and supply pipelines in complex engineering-geological conditions. A key factor in ensuring the reliability of operation is the control of the parameters of the stress-strain state. The accuracy of determining the parameters of VAT calculation methods of gas pipelines limited as the accuracy of the initial data for calculations and imperfection modelling approaches numerical schemes of gas pipelines. In the article, on the basis of numerical and experimental work, the rules for the development of computational schemes, setting boundary conditions and loading conditions of gas pipelines in determining the parameters of their stress-strain state by the finite element method are formulated
Principles of optimization of operation of gas-distributing unit taking into account non-stationary processes
Оne of basic elements of the gas transmission system of Russia are compressor stations which allow to provide the required volumes of transportation of gas and uninterrupted supply of natural gas to consumers. At the same time every start or shutdown of gas-distributing units at compressor stations, fluctuation in gas consumption, change of temperature and hydraulic operating modes, etc. lead to changes of the operating mode of all elements of the gas pipeline. Therefore, the problem of optimization of operating modes of gas-distributing units is very relevant
Prospects for using cyclic airs cooling systems for gas turbine plants based on absorption refrigerating machines as part of compressor stations
The way for increasing the efficiency of exploitation of compressor stations, equipped with gas turbine gas pumping units, in the hot season using a cycle airs cooling system of gas turbine units based on absorption refrigerating machines is considered. The factors that allow to obtain a useful effect when using cyclic airs cooling systems as part of compressor shops of compressor stations are shown. The article presents applications of absorption refrigerating machines to increase the efficiency of gas turbine installations and the results of the calculations of the influence of the systems cooling cyclic airs of gas turbine installations on the main energy and operational indicators of gas pumping aggregates and compressor shops. Requirements for the characteristics of cyclic airs cooling systems are substantiated, which allows to obtain the greatest technological effect, a methodological approach to assessing the effectiveness of this energy saving event is developed. Various applications of absorption cooling machines as part of compressor shops with gas turbine gas pumping units are considered
System for trainees’ actions automatic assessment in computer training complexes
The paper summarizes the theoretical knowledge and practical experience in computer-training complexes (CTC) development and proposes a system for real time automatic student’s actions assessment. The system controls that students’ actions follow the regulated sequence taking into account achievement of target indicators and compliance with technological limitations. The system has been tested as part of gas treatment unit CPC. The results can be used in CTC for continuous technological processes control
It is proposed to use the model hydraulic bench for assessing the stability of working fluids. The results of evaluation of changes in physical, chemical and operational properties of the working fluids during testing on the hydraulic bench are given. It is shown that the proposed work scheme for hydraulic bench allows assessing the stability of working fluids during test process. A fundamental technological scheme and description of work of the hydraulic bench that allows to model variable loads, pressure and temperature during work process of working fluids are presented. A program variant for testing of the working fluids is proposed for hydraulic fluid AMG-10 and possibilities for program estimation of the working fluids are described. Correlation of research results of the working fluids stability during testing on the model bench and in the hydraulic system of machinery during operation is determined
Approach to development of liquid and solid crosslinkers of aqueous polysaccharide gels for fracturing
The process of hydraulic fracturing is now one of the most effective methods of oil production stimulation. This has become an integral part of almost every development project. Hydraulic fracturing, however, entails a lot of difficulties and risks. A large number of parameters as well as variability of conditions should be taken into account during the preparation and implementation stage. Risks can be minimized and the quality of the processing can be improved by optimizing chemical reagent handling (transportation, storage, utilization). A special approach helps to optimize the work flow with chemical reagents when not individual chemicals are used, but compositions of chemicals of multifunctional purpose. The development of such compositions can be algorithmized and vary depending on tasks