ISSN 0130-3872 Scientific-technical journal OF OIL AND GAS WELLS ON LAND AND SEA published since 1993 April 2021 № 4(340) 12 issues per year
CONTENТS |
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TECHNIQUE AND TECHNOLOGY OF DRILLING |
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Kamenskikh S.V., Ulyasheva N.M., Chuprov I.F. Modeling of the process of permeable rocks colmatation by a biopolymer colmatating mixture (p. 10‑14) |
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Allakhverdiev Z.S., Kyazimova L.A. Analysis of the state of the borehole rod pump cylinder and some of its design features (p. 15‑18) |
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DRILLING FLUIDS |
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WELL CEMENTING |
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DEVELOPMENT OF OIL AND GAS FIELDS |
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DRILLING ON THE SEA SHELF |
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Sochneva I.O. Chinese drilling rigs in the Russian Arctic (p. 38‑50) |
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WELL OPERATION |
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Information on the articles |
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UDC 622.243.273 DOI: 10.33285/0130-3872-2021-4(340)-5-9
REMOVABLE TOOL FOR CORRECTING
Vyacheslav Vasilievich Neskoromnykh, Dr. of tech. sci., Professor, Head of the Department, Igor Andreevich Komarovsky, post-graduate student, senior laboratory worker
Siberian Federal University (SFU) 95, prospect named after "Krasnoyarsky rabochy" newspaper, Krasnoyarsk, 660025, Russian Federation, e-mail: sovair@bk.ru, igorkomarovskij702@gmail.com
The paper describes the theoretical issues of solving the problems associated with increasing the productivity of directional drilling operations. The design and technology of work of a removable diverting complex, which excludes tripping operations associated with artificial well deviation, is presented.
Keywords: diverter; well; device; removable diverting complex; lifting operations.
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UDC 622.24 DOI: 10.33285/0130-3872-2021-4(340)-10-14
MODELING OF THE PROCESS OF PERMEABLE ROCKS
COLMATATION
Sergey Vladislavovich Kamenskikh, Cand. of tech. sci., associate professor, Nadezhda Mikhailovna Ulyasheva, Cand. of tech. sci., Professor, Head of the Department, Ilya Fedorovich Chuprov, Dr. of tech. sci., associate professor, Professor, Department of High Mathematics
Ukhta State Technical University (USTU) 9, Pervomaiskaya str., Ukhta, 169300, Komi Republic, Russian Federation, e-mail: skamenskih@ugtu.net, nulyasheva@ugtu.net, ichuprov@ugtu.net
Deepening of wells in permeable formations quite often causes associated complications, such as lost circulation and differential sticking. Long-term studies of domestic and foreign scientists made it possible to establish the main causes of their occurrence, to develop various methods of prevention and elimination. However, to date, the problem has not been completely solved. The paper presents the results of studies of colmatation process of low- and medium-permeable rocks by the developed biopolymer colmatation mixture. In the course of the carried out experiments, statistical relationships were revealed between permeability, pressure drop and colmatation time, on the basis of which the process of clogging of low and medium permeable rocks was modeled. The developed models make it possible to evaluate and predict the colmatation time depending on the pressure drop and permeability. It is revealed that the obtained models correspond to the actual process and have an increased aggregate coefficient of multiple correlation, and the obtained coefficients are statistically significant according to the Student's t-test.
Keywords: permeability; pressure drop; colmatation time; biopolymer colmatating mixture; low and medium permeable rocks.
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UDC 622.276.012.05 DOI: 10.33285/0130-3872-2021-4(340)-15-18
ANALYSIS OF THE STATE OF THE BOREHOLE ROD
PUMP CYLINDER
Zameddin Sultanovich Allakhverdiev, PhD, associate professor, Latifa Arifovna Kyazimova, post-graduate student
Azerbaijan State University of Oil and Industry 34, Azadlyg prosp., Baku, AZ1010, Republic of Azerbaijan, e-mail: sultanelioglu@gmail.com, latifa.ismaylova@gmail.com
The paper presents a calculation of the friction force in borehole pumps. It should be noted that the presence of a large gap between the casing and the sleeve affects the reliability of the borehole pump, especially under operating conditions, since in this case the casing of the borehole pump is additionally periodically loaded by the force caused by the hydrostatic pressure of the fluid in the tubing. The purpose of the task is in the fact that after assembly, the cylinder of the borehole pump should provide free reciprocating movement of the plunger inside it.
Keywords: cylinder; borehole pump; cylinder axes; sleeve.
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UDC 622.245 DOI: 10.33285/0130-3872-2021-4(340)-19-24
THE CHOICE OF THE DRILLING FLUID RHEOLOGICAL PARAMETERS (p. 19)
Azamat Mitalimovich Gaidarov, junior researcher, Andrey Atlasovich Khubbatov, Cand. of tech. sci., Deputy Chief of the Laboratory, Dmitry Viktorovich Izyumchenko, Cand. of tech. sci., Head of the Center, Niyametdin Terlanovich Kadyrov, engineer, Mitalim Magomed-Rasulovich Gaidarov, Dr. of tech. sci., Head of the Laboratory
LLC "Gazprom VNIIGAZ" 15, bld. 1, Proektiruemy proezd No. 5537, Razvilka poselok, 142717, Moscow region, Russian Federation, e-mail: A_Gaydarov@vniigaz.gazprom.ru, A_Khubbatov@vniigaz.gazprom.ru, D_Izyumchenko@gwise.vniigaz.gazprom.ru, N_Kadyrov@gwise.vniigaz.gazprom.ru, M_Gaydarov@vniigaz.gazprom.ru
Technological indicators of modern drilling fluids should be strictly regulated: the quality of transportation of cuttings to the surface and cleaning of the wellbore depends on this. However, in practice, the choice of design values of rheological parameters throughout the well section is often incorrect. Such important factors as well design and profile, borehole diameter, casing running depth, geological section, lithology, thermobaric conditions, design planned mechanical speed, etc. are not taken into account. The difference between the optimal values of rheological parameters of the mud for the lower and upper intervals of the well is not taken into account. In The authors of the paper calculate the real rheological parameters of the solution based on its actual movement in the annular space.
Keywords: rheological indicators; drilling fluids; stickings; wellbore cleaning; ROP; bottom hole assembly; hydraulic diameter of the well section.
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UDC 622.24 DOI: 10.33285/0130-3872-2021-4(340)-25-30
DEVELOPMENT AND RESEARCH OF THE COMPOSITION
Igor Yurievich Bykov, Dr. of tech. sci., Professor, Head of the Department, Sergey Vladislavovich Kamenskikh, Cand. of tech. sci., associate professor, Nadezhda Mikhailovna Ulyasheva, Cand. of tech. sci., Professor, Head of the Department
Ukhta State Technical University (USTU) 9, Pervomaiskaya str., Ukhta, 169300, Komi Republic, Russian Federation, e-mail: ibykov@ugtu.net, skamenskih@ugtu.net, nulyasheva@ugtu.net
An analysis of a number of studies by domestic and foreign scientists, as well as the experience of drilling in hydrogen sulfide-containing highly permeable rocks shows that when opening and supporting such deposits, accompanying complications are possible, such as fluid losses of different intensity and differential sticking of the drilling tool. The decrease of backpressure on these formations causes possible gas-oil-water manifestations, which are complicated by the presence of hydrogen sulfide. Therefore, the study, improvement and development of compositions of technological fluids for drilling and fixing in hydrogen sulfide-containing highly permeable rocks are an urgent task. Process fluids (drilling flushing and grouting fluids, clogging and buffer fluids), during the period of their direct functions, constantly contact and interact with highly permeable rocks containing hydrogen sulfide, resulting in an almost irreversible deterioration of their properties and parameters. The paper presents the results of the development of process fluid compositions, providing high-quality and trouble-free opening and supporting of hydrogen sulfide-containing highly permeable rocks.
Keywords: process fluids; hydrogen sulfide-containing highly permeable rocks; absorption; differential sticking; hydrogen sulfide.
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UDC 622.622.2 DOI: 10.33285/0130-3872-2021-4(340)-31-37
PROBLEMS OF PRIMARY OPENING DURING
EXPLORATION, DEVELOPMENT
Orianda Alexandrovna Bragina1, Cand. of chemical sci., Ivan Dmitrievich Tashkevich2, post-graduate student, Renat Khasanovich Akchurin3, 4, Chief engineer, candidate for a degree, Andrey Gelievich Vakhromeev1, 2, 3, Dr. of geol.-mineral sci., associate professor, Head of the Geological Department, Professor of the Institute of subsoil assets use, Head of the Laboratory of Oil and Gas Geology, leading researcher, Sergey Alexandrovich Sverkunov1, 2, 3, Cand. of tech. sci., chief engineer in technology, associate professor, researcher
1 Institute of the Earth's Crust SB RAS 128, Lermontov str., Irkutsk, 664033, Russian Federation, e-mail: a.e.bragin@gmail.com, andrey_igp@mail.ru
2 Irkutsk National Research Technical University (IRNITU) 83, Lermontov str., Irkutsk, 664074, Russian Federation, e-mail: vantash@mail.ru
3 IF LLC "RN-Burenie" 257, Lermontov str., Irkutsk, 664057, Russian Federation, e-mail: dobro_75@mail.ru
4 Tyumen Industrial University 38, Volodarskystr, Tuymen, 625000, Russian Federation
Opening of productive formations and well completion are the limiting stages in the entire cycle of deep well construction aimed at prospecting, exploration and commercial production of hydrocarbons. The final result of all the costs incurred for well construction depends on the quality of the opening and completion. This paper presents the geological, hydrological and petrophysical characteristics of the terrigenous productive Verkhnechonsky horizon. Information is given on the composition and properties of the drilling fluids used during geological prospecting and exploration works in the Verkhnechonskoye field. The situation that developed during the first well construction intended for commercial production of Verkhnechonskaya oil is described. The presumable reason for the unsuccessful (unsuccessful) completion of one of the wells is the process of deep in-situ plugging of the bottomhole formation zone by an emulsion formed by formation fluids (oil, pore brine) and components of opening drilling mud.
Keywords: drilling; opening; completion; gas; killing; oil; perforation; productive layer; well flushing; emulsion.
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UDC 553.98 DOI: 10.33285/0130-3872-2021-4(340)-38-50
CHINESE DRILLING RIGS IN THE RUSSIAN ARCTIC (p. 38)
Inga Olegovna Sochneva, Cand. of tech. sci., associate professor, International Institute of Energy Policy and Diplomacy
Moscow State Institute of International Relations (University) of Ministry of Foreign Affairs of the Russian Federation 76, Vernadsky prosp., Moscow, 119454, Russian Federation
More than 40 years ago, a strategically important decision was made in the USSR on the necessity to study and develop the oil and gas resources of the Arctic shelf. Ten fields were discovered in the Russian Arctic shelf in 1982–1992, including three unique and five large ones. The work was simultaneously carried out by seven offshore drilling rigs. The well-known political and economic crisis events associated with the collapse of the USSR in the early 90s led to the actual loss of the bulk of offshore drilling rigs. As a result, there has been a sharp decline of drilling in the Arctic shelf. During 1993–2012 only seven fields were discovered. However, none of them was a unique one. The current annual volume of geological exploration in the Russian shelf makes 30–50 % of the volume of the late 1980s. Only three drilling rigs are working in the region. This is the main factor of attracting foreign drilling rigs to work. In 2020, three Chinese drilling rigs were operating in the Russian Arctic shelf (100 % of the drilling volume). In general, the Chinese trend is obvious. Chinese offshore drilling rigs are used in Russia on condition that personnel, services and equipment maintenance are carried out by Chinese partners. The prospects for this process are not bright for Russia. Already in the medium term, the country may finally lose the possibility of independent drilling in the Arctic shelf.
Keywords: Arctic; arctic shelf; drilling of wells; drilling rigs; China.
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UDC 622.242.4 DOI: 10.33285/0130-3872-2021-4(340)-51-55
PREVENTION OF UNCERTAINTIES WHEN ESTIMATING
THE LIMITS
Vladimir Yurievich Bliznyukov, Dr. of tech. sci., Professor, academician, Natig Ramiz Hajiyev, Cand. of tech. sci., drilling advisor
RANS 8, Varshavskoe av., Moscow, 117105, Russian Federation, e-mail: vublizn@yandex.ru, hajiyevnatik@yahoo.com
The paper discusses the use of an expert system application based on fuzzy logic (Fuzzy Logic Designer), to eliminate the uncertainties that occur in practice during the use of jack-up rigs (Jack-up Floating Rig) in offshore structures. The relevance of the study is associated with the need to search for new approaches to assessing the results of geotechnical studies when preparing floating drilling rigs for mobilization to the project area. This direction is the most important for reducing the expected risks when making a decision during the installation of the jack-up rig at the design point. The purpose of the study is to analyze the existing approaches and find the most optimal methods for solving problems associated with reducing uncertainties in assessing the suitability of a drilling rig. Fuzzy logic theory, expert judgment, software, MATLAB application, evaluation and analysis of input parameters and final output parameter are used as a method for solving the problem. The theory of fuzzy logic, as shown by the results of the analysis, carried out in the paper, can be one of the methods to reduce the risks of incidents associated with the failure of the jack-up floating drilling rig support. Recently, experts are increasingly using this theory to solve various problems in the oil and gas industry, including when drilling wells. Using this approach, it was possible to obtain positive results corresponding to expert assessments.
Keywords: jack-up floating drilling rig; support; shoe; geotechnical research; laboratory tests; theory of fuzzy logic.
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UDC 62-98:553.982.2:553.985 DOI: 10.33285/0130-3872-2021-4(340)-56-59
METHODOLOGY FOR DETERMINING RESERVOIR
PRESSURE
Evgeny Ivanovich Velichko, Cand. of tech. sci., Head of the Department, Institute of Oil, Gas and Energy, Yulia Georgievna Prasko, Cand. of tech. sci., associate professor, Institute of Oil, Gas and Energy, Alexey Evstafievich Nizhnik, Dr. of tech. sci., Professor, Institute of Oil, Gas and Energy
Kuban State Technological University 88/4, Starokubanskaya str., Krasnodar, 350057, Russian Federation, e-mail: johnbottle@mail.ru, prasko-yuliya@yandex.ru, nizhnikae@mail.ru
The paper describes a method for determining the effectiveness of geological and technical measures by determining the reservoir pressure before and after the operation. The calculation of determination of reservoir pressure is presented.
Keywords: well; bottomhole pumping equipment; complications; asphalt-resin-paraffin deposits; reservoir pressure; bottomhole pressure; dynamic level.
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UDC 622.276.72 DOI: 10.33285/0130-3872-2021-4(340)-60-64
COMPREHENSIVE APPLICATION OF THE METHODS
WHICH INCREASE
Elizaveta Vasilievna Shekhovtsova, post-graduate student, Institute of Mechanics, Vasily Vasilievich Romanko, post-graduate student, Institute of Mechanics, Stanislav Leonidovich Kim, Cand. of phys.-math. sci., senior researcher, Institute of Mechanics
Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences 34, Tatiana Baramzina str., Izhevsk, 426067, Russian Federation
The last decades of the Russian oil industry development are characterized by a deterioration of oil reserves composition. The problem of developing oil deposits, composed by carbonate reservoirs, containing oil of increased and high viscosity, occupies a special place and is global. In Russia, oil reserves in such reservoirs make more than 50 %, in the Udmurt Republic – 70 %. The features of the deposits’ geological-physical composition and the properties of the host fluids make many of these reserves difficult to recover. The paper assesses the possibilities of applying a combined method of oil recovery enhancement by the impact of thermopolymer technologies and magnetic activators on viscous and high-viscous oils from Udmurtia fields.
Keywords: high-viscous oils; fractured carbonate reservoirs; thermal methods of a formation stimulation; polymer flooding; polyacrylamide (PAA); magnetic activators.
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NATIONAL UNIVERSITY OF OIL AND GAS "GUBKIN UNIVERSITY" |