Equipment and Technologies for Oil and Gas Complex

Dynamic vane pumps for oil production are characterized by supply and pump head, which, in some cases, allows assessing the possibility of using this equipment in certain operating conditions. However, when working on a gas-liquid mixture, determining the pump head in both bench and field conditions becomes a difficult task due to the uncertainty of the mixture density with changes in pressure, temperature, volume gas content and other parameters. At the same time, the values of pressure and liquid supply in the nodes of the well – pumping unit system can be quite simply determined and become the basis for constructing the characteristics of the pump in the "supply–pressure" coordinates. The paper raises the problem of the legality of replacing the working indicator "pump head" adopted for dynamic pumps with the indicator "pump pressure", as a more universal and meeting the requirements for improving the accuracy of its determination. This, in turn, will lead to an increase in the efficiency of monitoring, modeling and digitalization of mechanized oil production facilities.

Keywords: characteristics of the vane pump; liquid supply; pump head; pressure; gas-liquid mixture; monitoring; modeling; digitalization of the oil production process.

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UDC 622.276.74.05 DOI: 10.33285/1999-6934-2021-5(125)-12-17

DEVELOPMENT OF THE EQUIPMENT
FOR THE REMOVAL OF CLAY-SAND PLUGS, AS WELL AS COLMATATION
IN THE PERFORATION ZONE IN PRODUCING WELLS (p. 12)

Maxim Vitalievich Omelyanyuk, Сand. of tech sci., associate professor

Kuban State Technological University

Krasnodar, Russian Federation,

e-mail: m.omelyanyuk@mail.ru

The developed downhole equipment is designed to ensure production columns drifting, to increase and restore the flow rate of wells that decreased as a result of the colmatation of a well bottom-hole zone, as well as wells being idle for a long time and wells after drilling. The causes of the deposits formation in the perforation interval can be different: biological, physical, chemical colmatage. The destruction of bottom-hole zones at the late stages of fields’ development contributes to the formation of a compacted clay plug that completely covers the perforation interval. Standard methods of direct or reverse flushing with liquids do not guarantee complete cleaning of the entire section of the production column, including cleaning of the perforation channels. The authors of the paper have developed jet assemblies for wellbores cleaning and oil production intensification, which have been successfully tested at the fields of the Krasnodar Territory and the Republic of Bashkortostan.

Keywords: downhole equipment; pulse impact; cavitation; colmatage; perforation channel; flow rate; propant.

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UDC 622.276.53.054.23:621.67-83 DOI: 10.33285/1999-6934-2021-5(125)-18-23

ANALYSIS OF THE POSSIBILITY OF USING FILTER ELEMENTS
TO PROTECT DOWNHOLE PUMPING EQUIPMENT
FROM MECHANICAL IMPURITIES (p. 18)

Andrey Vladimirovich Bulat, Cand. of tech. sci., associate professor,

Svetlana Aleksandrovna Karelina

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: avbulat87@gmail.com, karelina2007@yandex.ru

The paper analyzes the possibilities of using filter elements to protect well pumping equipment from mechanical impurities. The analysis is carried out for various operating conditions of the equipment. The areas of inefficient use of standard filter elements are identified and it is proposed to use filter elements made of oleophobic materials that ensure not only the creation of a pre-filter of mechanical impurities with oil on the surface of the equipment, but also the destruction of this pre-filter (self-cleaning of the filter) when the mode of movement of the liquid being cleaned changes.

Keywords: mechanical impurities; filters; oil production; oleophobic coatings; particle sizes of mechanical impurities; regeneration.

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UDC 622.276.53-057-2 DOI: 10.33285/1999-6934-2021-5(125)-24-28

THE INFLUENCE OF SOME GEOMETRIC PARAMETERS OF OPEN
IMPELLERS ON THE CHARACTERISTICS OF THE ELECTRIC
SUBMERSIBLE PUMP STAGES (p. 24)

Alexander Vladimirovich Ivanovsky

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: alivan95@yandex.ru

Electric submersible pumps (ESP) are widely used when operating small-diameter sidetracks. When using stages with open impellers in these pumps, it becomes possible to reduce the axial dimensions and vibration loads occurring in the equipment. However, these stages have a number of problems, one of which is the relatively low discharge head and efficiency indicators.

The results of numerical studies of some geometric parameters influence of open impellers (in particular, the number of impeller blades, the angle of inclination of the impeller blades, as well as changes in the axial clearances between the working elements of the stage) on the characteristics of the electric submersible pump stages are presented. The ranges of optimal geometric parameters are shown, as a result of which it is possible to achieve the highest values of discharge head and efficiency of the ESP stage with open impellers.

Keywords: ESP stages; open impellers; geometric parameters; CFD-analysis; discharge head; efficiency.

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UDC 006.022 DOI: 10.33285/1999-6934-2021-5(125)-29-33

STUDY OF THE REGULATORY FRAMEWORK FOR HEAT EXCHANGE EQUIPMENT
IN THE CONTEXT OF EXPANDING THE SHARE OF DOMESTIC SUPPLIERS
FOR INTERNATIONAL OIL AND GAS PROJECTS. PART 1 (p. 29)

Tatiana Alekseevna Guseva, Cand. of tech. sci., associate professor,

Alexander Sergeevich Panteleev, Cand. of tech. sci., associate professor,

Maxim Petrovich Polikarpov, Cand. of tech. sci., associate professor

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: tguseva14@yandex.ru, aleksandr.panteleew@yandex.ru, polikarpov.m@gubkin.ru

The paper discusses the key aspects of the study conducted by the authors of the paper, devoted to the problems of national standardization documents of Russia in relation to the achievement of compliance of domestic and foreign standards to oil and gas sector (OGS) of industry. The results of the developed methodology implementation for assessing and selecting Russian suppliers of equipment and technical devices for OGS are presented on the example of pressure vessels and heat exchangers. In the course of the study, Russian and American, corporate standardization documents for the selected type of product were comparatively analyzed, as well as the degree of equivalence of their requirements was also determined. The features of the Russian regulatory framework for the equipment, working under pressure, and plate-and-frame heat exchangers were identified, the differences in the requirements between the documents of GOST, GOST R and the standards ISO, API, ASME, etc. were determined. The results of the study made it possible to develop recommendations for domestic manufacturers in order to participate in the international oil and gas projects.

Keywords: pressure vessels; heat exchange equipment; plate-and-frame heat exchangers; standards; comparative analysis; risk assessment; supplier assessment.

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UDC 550.8 DOI: 10.33285/1999-6934-2021-5(125)-34-53

DEVELOPMENT OF A SYSTEM FOR A COMPLEX QUANTATIVE ASSESMENT
OF RESERVOIR OILS SAMPLES QUALITY. PART II. THE SYSTEM DESCRIPTION
(p. 34)

Alexey Aleksandrovich Lobanov, Cand. of tech. sci., chief specialist, associate professor

LLC "Gazpromneft NTC"

Tyumen, Russian Federation,

e-mail: lobanov.mdh@gmail.com

Kazan (Volga Region) Federal University

Kazan, Republic of Tatarstan, Russian Federation

By presenting this paper, the author continues a series of papers devoted to technical, regulatory, methodological, administrative and business aspects of the current situation in the field of reservoir fluids deep sampling in the Russian Federation. Proposals are presented to clarify the existing terminology in the field of reservoir fluids sampling and the regulatory-methodological grounds for developing a system for quantitative assessment of the deep samples quality.

Keywords: reservoir fluids; deep sampling; quality management system; quality assurance; quality control; PVT.

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UDC 622.276+658.566 DOI: 10.33285/1999-6934-2021-5(125)-54-58

CURRENT TRENDS IN ASSURANCE AND QUALITY CONTROL OF MATERIAL
AND TECHNICAL SUPPORT PROCESSES IN THE OIL AND GAS INDUSTRY (p. 54)

Yaroslav Andreevich Ozhigov

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: ozhigov21@mail.ru

The paper discusses the actual concepts of quality control of material and technical support (MTS) processes in the oil and gas sector. The evolution of activity models in the MTS field is presented. The key features of the models in the context of the activity arrangement, the responsibility of the participants and the set of methods and quality tools used are considered. Conclusions are drawn about the degree of activity models applicability to projects implemented in the format of the "EPC contract". The main organizations in the field of defining contract models for EPC contractors and the characteristics of each contract model are overviewed. The principles of building an automated and transparent quality system in the field of logistics are determined.

Keywords: material and technical support; supply chains management; quality system of procurement; supply quality control; expediting; EPC contract; centralized supply.

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UDC 622.248 DOI: 10.33285/1999-6934-2021-5(125)-59-64

ANALYSIS OF TECHNIQUES PREVENTING DRILLING MUD LOSSES (p. 59)

Fatali Abbas Akhundov, Cand. of tech. sci.

Institute of Oil and Gas of the National Academy of Sciences of Azerbaijan

Baku, Republic of Azerbaijan,

e-mail: fataliaxundov@gmail.com

The paper analyzes the drilling fluid absorptions that have recently occurred during wells on-land drilling in Azerbaijan. The influence of methods and isolating compositions on the isolation of absorbing formations effectiveness is analyzed as well. Some liquids and mixtures that could be used in the process of wells drilling were identified.

For example, when the drilling fluid absorption during wells drilling is observed, the practice of using cement mortars (mixtures) is widely applied. However, the repeated application of this method when isolating the absorption zone in many wells did not prove a positive result. There also exists a method of injecting an aqueous solution of sodium silicate into the drilling fluid absorption interval. However, the fragility of the obtained sediment in the pores of the absorbing layer has become a big obstacle to its widespread use.

In other scientific papers it is proposed to deliver insulating solution to the absorption zone through drill pipes, followed by a retention time. Moreover, the insulating solution’s strength properties instability in the pores of the reservoir in time also proves the low efficiency of this method. In addition to the above-mentioned scientific papers, many other ones are known that suggest determining the interval of the drilling fluid absorption occurrence, followed by insulating solution, based on clay paste, simultaneous injection in equal volumes through the drill pipes, prepared on an aqueous solution (15…20 %) of calcium chloride and 8…10 % concentration of hypane.

Our experimental studies have revealed a new method of drilling fluid absorption isolation, which includes injection of an insulating solution with an aqueous solution of calcium chloride with a separate sequential supply through a drill pipe string and annulus. It is proposed to use a solution based on the bentonite clay, oxypropylated polyacrylic acid and water.

Keywords: drilling of oil and gas wells; absorption in a well; partial absorption of drilling fluid; loss of large volumes of drilling fluid; catastrophic absorption of drilling fluid; insulating fluid; calcium chloride; polymer of oxypropylated polyacrylic acid; polymer grouting solution.

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UDC 622.276.72 DOI: 10.33285/1999-6934-2021-5(125)-65-68

CABLE ELECTRIC HEATING OF OIL AND GAS WELLS IS A METHOD
OF COMBATING PARAFFIN DEPOSITS AND GAS HYDRATES (p. 65)

Konstantin Kharlampievich Shotidi, Cand. of tech. sci., Professor

National University of Oil and Gas "Gubkin University"

Moscow, Russian Federation,

e-mail: chotidi.k@gubkin.ru

Sergey Vladimirovich Krasenkov

LLC OKB "GAMMA"

Ivanteevka, Moscow region, Russian Federation,

e-mail: krasenkov.s@yandex.ru

According to the operating organization, gas hydrates are formed during the operation of well 1307 of the Vyngapurovskoye field, and, taking into account the 5 % mass fraction of paraffins and the low flow rate of the well (7 m³/day), formation of paraffin deposits in the tubing is quite possible. The operational results of a three-core flat heating cable, previously installed on the external surface of the tubing, appeared unsatisfactory due to insufficient heat dissipation power. The paper presents a thermal engineering calculation, the purpose of which is to assess the possibility of protecting well 1307 from the formation of gas hydrates and paraffin deposits by an extended electric heater with a variable heat output power.

Keywords: borehole heating cable; paraffin deposits; gas hydrates; electric heating of wells; complicated conditions of oil production.

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UDC 622.276.6:622.276.5.05 DOI: 10.33285/1999-6934-2021-5(125)-69-72

EXPERIENCE OF DESIGNING AND INDUSTRIAL USE OF ROTARY PULSATORS
AT OIL FIELDS OF THE REPUBLIC OF BELARUS (p. 69)

Dmitry Viktorovich Tkachev, Head of the Department

Production Association BelNIPIneft of "Belorusneft"

Gomel, Republic of Belarus,

e-mail: d.tkachev@beloil.by

Viktor Mikhailovich Tkachev, Deputy Director for educational work,

Alexander Mikhailovich Selyutin, Cand. of tech. sci.

Pavel Sukhoi Gomel State Technical University

Gomel, Republic of Belarus,

e-mail: vmtkachev@gstu.by

The paper considers the experience of designing and industrial use of hydrodynamic pulsators with rotating jets of technological fluid for the treatment of oil wells. The performance efficiency indicators after conducting geological-technical measures to stimulate the inflow at the oil fields of the Republic of Belarus are presented.

Keywords: enhanced oil recovery; jet-pulse treatment of wells; rotary pulsator.

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UDC 622.692.4.076:620.193/.197 DOI: 10.33285/1999-6934-2021-5(125)-73-81

INVESTIGATION OF THE FACTORS WHICH CAUSE DAMAGE
TO THE INSULATION COATING OF A LONG-TERM OPERATING SECTION
OF A MAIN GAS PIPELINE (p. 73)

Ruslan Viktorovich Aginey, Dr. of tech. sci., Professor, Rector,

Ekaterina Vladimirovna Isupova, Cand. of tech. sci.

Ukhta State Technical University

Ukhta, Russian Federation,

e-mail: eisupova@ugtu.net

The paper presents the results of the analysis of the factors influence degree which cause the emergence and development of insulation coating defects of a main gas pipeline. The developed classification of factors leading to the damage of the insulating coating of main gas and oil pipelines at the stages of construction and operation is represented by two groups of their constituents: regulated and non-regulated. It has been revealed that the most important factors that can form pipelines’ film coating defectiveness are soil characteristics and temperature changes in the environmental and pumped media It is shown that improvement of the methods for detecting the degree of underground pipelines coating sagging requires taking into account these factors and their constituents in order to form a new methodological base for monitoring the insulation coating of main gas and oil pipelines.

Keywords: anti-corrosion protection; gas and oil pipelines; insulating coating; defects; cathodic disbonding.

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