ISSN 0130-3872 Scientific-technical journal OF OIL AND GAS WELLS ON LAND AND SEA published since 1993 October 2020 № 10(334) 12 issues per year
CONTENТS |
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DRILLING TECHNIQUE AND TECHNOLOGY |
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Nikitin V.I., Nechaeva O.A., Kamaeva E.A. Experimental procedure for determining a core sample saturation by a drilling fluid filtrate (p. 14‑16) |
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Popov M.A., Popov A.N. Use of geophysical data on rock porosity when selecting types of bits (p. 17‑19) |
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DRILLING FLUIDS |
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CEMENTING OF WELLS |
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DEVELOPMENT OF OIL AND GAS FIELDS |
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OPERATION OF WELLS |
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Information on the articles |
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UDC 622.245.72 DOI: 10.33285/0130-3872-2020-10(334)-5-13
TO THE QUESTION OF HEAT
TRANSFER IN THE ANNULAR GAP
Vladimir Georgievich Griguletskiy, Dr. of tech. sci., Professor
National University of Oil and Gas "Gubkin University" 65, Leninsky prosp., Moscow, 119991, Russian Federation
Yury Petrovich Saveliev, Dr. of tech. sci., Professor
Baltic State Technical University "VOENMECH" 1, Pervaya Krasnoarmeiskaya str., St. Petersburg, 190005, Russian Federation
The paper is devoted to the theoretical description of the dynamic and temperature fields of a turbulent flow in the gap of two coaxial cylindrical pipelines in order to determine the dimensionless coefficients of resistance in the Darcy form and heat transfer in the Nusselt form. On the basis of a modernized semi-empirical model of turbulence, their dependences on the Reynolds characteristic number, the ratio of the diameters of coaxial cylindrical pipes, the relative degrees of the pipe walls of roughness, etc., are determined. For boundary conditions of the second kind with respect to the temperature field (the ratios of specific heat fluxes on the inner walls of the gap are given), the solution of the set problem is reduced to quadratures.
Keywords: turbulent flow; annular gap; annular space; Darcy coefficient; Nusselt coefficient; roughness of the walls.
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UDC 622.24.062+622.24.063 DOI: 10.33285/0130-3872-2020-10(334)-14-16
EXPERIMENTAL PROCEDURE
Vasily Igorevich Nikitin, Cand. of tech. sci., associate professor, Olga Alexandrovna Nechaeva, Cand. of tech. sci., associate professor, Elena Anatolievna Kamaeva, senior lecturer
Samara State Technical University 244, Molodogvardeiskaya str., Samara, 443100, Russian Federation, e-mail: nikitinv@list.ru, nechaevaoa@gmail.com, kamaevaea@mail.ru
The paper considers the problem of physical modeling of penetration process of filtrate of drilling flushingfluid into the porous space of the rock. In case of the filtrate of the water-based flushing fluid penetration, the filtration characteristics of a formation change. Study of the mechanism of oil permeabilityreduction due to the aqueous phase penetration is an important problem, the solution of which will reduce the negative impact of the flushing fluid on the formation. The results obtained due to thismethodapplication can be usedwhen developinga reservoir opening fluid, as well as when estimating the well bottom zone permeability.
Keywords: drilling mud; flushing liquid; filtrate; permeability; core; saturation; experiment.
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UDC 622.24(75.8) DOI: 10.33285/0130-3872-2020-10(334)-17-19
USE OF GEOPHYSICAL DATA ON
ROCK POROSITY
Mikhail Anatolievich Popov, senior manager
LLC "RN-Center of Expert Support and Technical Development" 5, Pervomaiskaya str., Tyumen, 625000, Russian Federation, e-mail: mpopov123@hotmail.com
Anatily Nikolaevich Popov, Dr. of tech. sci., Professor
Ufa State Petroleum Technical University (USPTU) 1, Kosmonavtov str., Ufa, 450062, Russian Federation, e-mail: popovan.36@mail.ru
The relevance of the study is caused by the necessity to correct the choice of rock cutting tools in conditions of insufficient information on the mechanical properties of rocks, obtained during direct testing. It is proposed to use the geophysical data correlations on the porosity of the main lithological differences of rocks in the deposit section with their yield stress by the stamp. The necessary formulas for performing the corresponding calculations are given. It is shown that the data on the rocks porosity can improve the accuracy of bringing their yield point to a well bottom conditions.
Keywords: bit selection; rock yield stress; lithology; porosity; depressing pressure.
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UDC 62-752.2 DOI: 10.33285/0130-3872-2020-10(334)-20-24
PROBABILISTIC ANALYSIS OF
THE EFFICIENCY
Kirill Alexandrovich Bashmur, senior lecturer, Alexander Vladimirovich Zagulyaev, graduate student, Maria Sergeevna Zharnakova, graduate student, Veronika Andreevna Popova, graduate student
"Siberian Federal University", Institute of Oil and Gas 82, bld. 6, Svobodny prosp., Krasnoyarsk, 660041, Russian Federation, e-mail: bashmur@bk.ru
The paper discusses the problem of the negative impact of longitudinal high-amplitude vibrations of a drill string, arising during drilling with roller cone drill bits and hybrid bits, on drilling equipment and the process of rotary drilling. Methods of protection against this type of vibration are considered. A promising method of passive vibration damping – the use of shock vibration dampers – is highlighted. A design of a floating-type shock vibration damper for a drill string with a discrete working medium is proposed, in which, in comparison with the analogues, the negative effect of inertia is eliminated and the degree of damping is increased. A probabilistic model is proposed for the analysis of energy dissipation, which, in comparison with a shock absorber without a discrete working medium, increases several times. The efficiency of using a discrete working medium with high-amplitude vibrations is shown, in particular, with a sharp setting of the bit at the well bottom.
Keywords: drilling; drill string; damping of vibrations; longitudinal vibrations; shock vibration damper; discrete working environment.
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UDC 622.24.063.2 DOI: 10.33285/0130-3872-2020-10(334)-25-28
A STUDY OF
HYDROCARBON-BASED SOLUTIONS RHEOLOGY DEPENDING
Mikhail Vladimirovich Dvoinikov, Dr. of tech. sci., Professor, Nikolay Ivanovich Nikolaev, Dr. of tech. sci., Professor, Maria Vladimirovna Nutskova, Cand. of tech. sci., associate professor, Margarita Evgenievna Budovskaya, post-graduate student, Dmitry Andreevich Sidorov, post-graduate student
Saint Petersburg Mining University 2, Vasilievsky ostrov, 21st liniya, St. Petersburg, 199106, Russian Federation, e-mail: dvoinik72@gmail.com, nikinik@mail.ru, turitsyna_maria@mail.ru, folloo.01@mail.ru, dmitrysidorov95@gmail.com
The increasing demand for the use of oil-based flushing fluids is associated with the constantly growing requirements for the quality of productive formation sopening. Completion of wells using hydrocarbon-based fluids is most appropriate to preserve the reservoir properties of the productive formation, but such fluids are quite expensive. To reduce the cost of such systems, emulsion solutions have been developed, which are increasingly being used during the initial opening, however, for their effective use, it is necessary to reasonably select the component composition [1]. It is most expedient to use such drilling fluids when developing large oil and gas fields. One of those ones is the Kovykta gas condensate field, which belongs to the resource-forming fields of the "Power of Siberia" pipeline. It is known that the mud used to open a formation should not degrade the natural permeability of the productive zones and provide excellent wellbore washing. In this regard, to meet all the tasks set, base oil is used as a base for a hydrocarbon-based solution, which plays an important role. The oil has a direct impact on the rheological and filtration characteristics of the hydrocarbon system [2]. The studies carried out in the paper proved the effectiveness of the use of synthetic specialized low-viscosity oils, and also opened up a space for further study of the patterns that arise when changing the component composition.
Keywords: well drilling; complications; laboratory research; rheology; hydrocarbon-based solutions; emulsion solutions; productive formation; viscosity.
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UDC 622.245.422 DOI: 10.33285/0130-3872-2020-10(334)-29-33
A MATHEMATICAL MODEL FOR
ESTIMATING
Konstantin Fedorovich Shut, Cand. of tech. sci., associate professor, Konstantin Viktorovich Pelipenko, master’s student
National University of Oil and Gas "Gubkin University" 65, bld. 1, Leninsky prosp., Moscow, 119991, Russian Federation, e-mail: cemlab@yandex.ru, pelipenko.k96@yandex.ru
The quality of a well cementing and productive formations separation depend, in particular, on the physical-mechanical properties of the plugging material. The paper proposes a mathematical model to determine the required strength of the plugging stone.
Keywords: physical-mechanical properties of plugging cement stone; von Mises's energy theory of strength; ideal thick-walled double-layer cylinder.
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UDC 622.244 DOI: 10.33285/0130-3872-2020-10(334)-34-38
EVALUATION OF THE
EFFECTIVENESS OF MEASURES AIMED AT REDUCTION
Nargiz Alchin Shirinzade, doctoral student
Institute of Ecology of the National Aerospace Agency of the Ministry of the Defense Industry of the Azerbaijan Republic e-mail: nargizshirinzade@gmail.com
When analyzing the current situation in order to select the most effective solutions to limit oil production at one of the oil and gas production departments of the Azerbaijan Republic in the context of the Covid-19 pandemic, it was proposed to apply the "expert assessment" method. The essence of the method lies in the fact that the decision-making, forecast, conclusion are based on the opinion of specialists (experts) proceeded from their knowledge and practical professional experience. These estimates are probabilistic, based on the ability to provide useful information under conditions of uncertainty. In this case, with the variety of the planned measures to reduce oil production, it was of interest to assess the consistency and identify the general opinion of experts. For this purpose, a survey of a number of specialists was conducted based on the method of expert assessments. The degree of agreement of experts was assessed by the so-called by the value of the concordance coefficient. The paper substantiates the expediency of the planned measures and recommends, the sequence of their implementation in order to reduce oil production in the oil and gas production departments of the Azerbaijan Republic in the context of the Covid-19 pandemic.
Keywords: deposit; well; production; expert assessment; pandemic.
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UDC 539.375+531.375 DOI: 10.33285/0130-3872-2020-10(334)-39-41
ON ONE MATHEMATICAL MODEL IN
THE PROBLEM
Vladislav Igorevich Dunaev, Dr. of phys.-math. sci., Professor, Ivan Anatolievich Tereshchenko, senior lecturer, Evgeny Ivanovich Velichko, Cand. of tech. sci., associate professor, Head of the Department, Stanislav Ivanovich Shiyan, Cand. of tech. sci., associate professor
"Kuban State Technological University" 2, Moskovskaya str., Krasnodar, 350072, Russian Federation, e-mail: dunaevatv@mail.ru, ongptr@mail.ru, johnbottle@mail.ru, akngs@mail.ru
The fluid injected into a well provokes a redistribution of stress components in an oil-bearing formation, which promotes the formation and development of a vertical fracture, which ensures productive and long-term operation of an oil well. The paper proposes an energy condition for brittle fracture, generalizing the classical condition of A. Griffiths, which explicitly takes into account the dependence of the critical pressure on the temperature and the linear coefficient of the materialthermal expansion.
Keywords: rocks; work of external forces; internal energy; thermal expansion coefficient; defect model; defect outline.
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UDC 621.642.39:624.014.078.45 DOI: 10.33285/0130-3872-2020-10(334)-42-47
MODERN METHODS OF
INSTALLATION
Evgeny Ivanovich Velichko, Cand. of tech. sci., associate professor, Head of the Department, Vitaly Viktorovich Dubov, senior lecturer, Alexey Evstafievich Nizhnik, Dr. of tech. sci., Professor, Anna Viktorovna Muzykantova, senior lecturer
"Kuban State Technological University" 149, Stavropolskaya str., Krasnodar, 350040, Russian Federation, e-mail: johnbottle@mail.ru, nizhnikae@mail.ru, nytamuz@mail.ru
The paper highlights modern methods of assembling floating roofs of vertical steel tanks using the example of a RVSPK tank with a volume of 100000 m3. The sequence of technological operations is described in detail: assembly of the central compartment of the floating roof, installation of boxes and additional elements, assembly and leveling of the compartments of the floating roof. The methods for testing floating roof boxes for tightness are given. The modern methods and technological techniques applied for the welding of floating roofs are considered.
Keywords: assembly; floating roof; boxes; tightness; vertical steel tank; welding; non-destructive control.
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NATIONAL UNIVERSITY OF OIL AND GAS "GUBKIN UNIVERSITY" |