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ISSN 0132-2222 Scientific-technical journal AND COMMUNICATION IN OIL INDUSTRY published since 1973 October 2019 ¹ 10(555) 12 issues per year
CONTENÒS |
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MEASURING, AUTOMATION, TELEMECHANIZATION AND COMMUNICATION FACILITIES |
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Smirnov D.V., Smirnov V.I. The method of accidents localization on the main pipelines (p. 19‑21) |
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MATHEMATICAL MODELING AND SOFTWARE |
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Lykhin P.A., Usov E.V., Chukhno V.I., Kurmangaliev R.Z., Ulyanov V.N. Simulation of gas-fluid flows motion in a directional well (p. 22‑27) |
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Pichkur E.V. Model building of an electrical-submersible pump unit with the asynchronized engine (p. 28‑31) |
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Information on the articles |
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UDC 681.5:622.276+622.279 DOI: 10.33285/0132-2222-2019-10(555)-5-11
A SYSTEM OF AUTOMATIC REGULATION
Dmitry Nikolaevich Trushnikov, leading specialist, Ruslan Ravilevich Lopatin, Cand. of tech. sci., manager, Andrey Nikolaevich Kharitonov, Cand. of phys.-math. sci., senior expert, Anton Yurievich Yushkov, Cand. of tech. sci., senior expert, Alexander Vladimirovich Strekalov, Dr. of tech. sci., senior expert
LLC "Tyumen Oil Research Center" 42, Maxim Gorky str., Tyumen, Tyumen region, 625048, Russian Federation, e-mail: dntrushnikov@tnnc.rosneft.ru
The paper considers the system of automatic regulation of gas and gas-condensate wells modes as an element of an intellectual field concept. The system of automatic field control (SAFC) is based on a constantly operating dynamic model, the adaptation of which occurs using the data from field instrumentation. After multivariate forecast calculations, the model determines the optimal mode of a field operation. To transfer to the optimal operating mode, there arise restrictions to the distributed systems of automatic regulation (SAR) of wells operational modes. A simplified non-stationary model of gas-dynamic processes is responsible for decision-making process on SAR unit control. The model, along with the control algorithms (maintaining a given flow rate, putting wells into operational mode) and diagnostics (monitoring of emergency situations), takes into account the restrictions for control of hydrate formation, sand and water manifestations. Application of the SAR advanced algorithms makes it possible to maintain a stationary mode of a field’s hydraulic system due to the damping of pressure waves. This approach to a well distributed control allows increasing the efficiency of gas production, while reducing production costs by streamlining control actions and reducing the time for making and executing management decisions.
Keywords: intellectualization; optimization; digitalization; gas and gas condensate fields; automatic control system; math modeling.
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UDC 681.5:622.276+622.279 DOI: 10.33285/0132-2222-2019-10(555)-12-18
An algorithm for determining
the volume fractions
I.N. Moskalev, A.V. Semenov
Moscow University named after S.Yu. Witte 12, bld. 1, Vtoroy Kozhukhovsky proezd, Moscow, 115432, Russian Federation, e-mail: igor.moskalev.2015@mail.ru
When measuring partial flow of products, produced from gas condensate and oil condensate wells using multiphase flow meters (MFM), it is necessary to determine the volume of each component (gas, water, condensate) in a gas-liquid mixture. One of the promising methods for solving the problem is the use of a densitometer based on the dielcometric principle. The main element of such a densitometer is a decimetric-range cavity resonator partially filled with a dielectric. Based on the previously performed work, the paper proposes an algorithm for determining the volume fraction of each component using the measurement of attenuation caused by the aqueous phase; the metrological capabilities of the existing density meter are evaluated; requirements for the electronic equipment, serving the flowmeter, are established. It is concluded that the scheme using the previously proposed 120 mm resonator operating on the E010 mode and having a through hole with a diameter of 40 mm will record the condensate content with an error of less than 5 % only in wells with a high condensate-gas factor (CGF) (more than ~ 600 cm3/m3). In wells with low CGF, other multifunctional design or precision methods for measuring the quality factor of a microwave cavity resonator should be considered.
Keywords: gas-liquid flow; flow meter; density measurement; dielcometric method; resonator; dielectric constant; biphasic dispersed flow; well.
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UDC 656.56:62-52:004 DOI: 10.33285/0132-2222-2019-10(555)-19-21
THE METHOD OF ACCIDENTS LOCALIZATION
Dmitry Viktorovich Smirnov, postgraduate student, senior lecturer, Viktor Ivanovich Smirnov, postgraduate student, assistant
Tyumen Industrial University 70, Melnikaite str., Tyumen, 625000, Russian Federation, e-mail: smirnovdv@tyuiu.ru, smirnovvi@tyuiu.ru
The paper considers the remote monitoring method of the state and protection of the main pipeline from leaks, which can be used when creating automated control systems of the transport of oil, gas, water and other products. This method improves the reliability of the main pipeline operation by increasing the accuracy of leaks detection from it and their localization, which reduces the losses of the pumped product and harmful effects on the environment. The method of accidents localization on trunk pipelines provides for monitoring the electrical parameters of synchronous drive electric motors of pumping units at pumping stations. The method is based on the measurement of current and excitation voltage to determine the power consumed by the excitation system of synchronous drive motors of pumping units at the beginning and end of the linear section of the pipeline, then the mismatch between them is calculated and, if the current mismatch of the permissible value is exceeded, a control effect on an emergency situation localization on the main pipeline is issued.
Keywords: accident localization; trunk pipeline; synchronous electric motor; pump unit.
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UDC 532 DOI: 10.33285/0132-2222-2019-10(555)-22-27
SIMULATION OF GAS-FLUID FLOWS MOTION
P.A. Lykhin, R.Z. Kurmangaliev, V.N. Ulyanov
LLC "Novosibirsk Scientific and Technical Center" 20, Inzhenernaya str., Novosibirsk , 630090, Russian Federation, e-mail: info@nntc.pro
E.V. Usov, V.I. Chukhno
IBRAE RAS, Novosibirsk branch 1, academician Lavrentev prosp., Novosibirsk , 630090, Russian Federation
The effective operation of oil fields is largely determined by the technological modes of raw materials production, that ensure wells long-term operation, as well as a high level of water flooding and oil recovery coefficient. The established technological mode of a well operation means a set of basic parameters of its work, which ensure the production of oil, gas and gas condensate during a certain time period. The technological mode of wells operation provides regulation of the development process and is characterized by reservoir, well bottom and wellhead pressures; production rate; standard sizes of the installed operational equipment and its operational time. The tasks of technological modes calculations and optimization of joint work of several producing wells are relevant at present. Accounting of the late stage of a well stock operation, a search of the methods to be applied for wells production-rate increase is underway [1]. A physical-mathematical model of the flow of the produced gas-liquid mixture in a well, which can be used to calculate and optimize the technological regime has been implemented.
Keywords: non-stationary model of a multiphase flow; fluid properties modeling; gas-liquid flow in a directional well.
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UDC 681.5.017 DOI: 10.33285/0132-2222-2019-10(555)-28-31
MODEL BUILDING OF AN ELECTRICAL-SUBMERSIBLE PUMP UNIT
Elena Vladimirovna Pichkur, assistant
Tyumen Industrial University 38, Volodarsky str., Tyumen, 625000, Russian Federation, e-mail: pichkurev@tyuiu.ru
The paper considers the problem of influence of ESP unit with frequency transducers (FT) on the electric power quality in distribution networks of oil fields. Wide use of frequency transducers results in the increase of availability of the highest harmonic components of current and tension and a jet component of a power consumption in networks. A consequence of these negative factors is emergency shutdowns increase. That’s why it requires researching of the influence of a power line and ESP system with FT which will give the chance to correct the available techniques and regulations of equipment selection.
Keywords: frequency transducer; unit of an electrical-submersible pump (ESP); the highest harmonic components; wattless power; power line.
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UDC 532.57+620.113+621.6 DOI: 10.33285/0132-2222-2019-10(555)-32-38
REPRODUCTION AND TRANSMISSION OF MEASUREMENT UNITS
Vladimir Nikolaevich Petrov, Cand. of tech. sci., leading researcher, Sergey Lvovich Malyshev, Cand. of tech. sci., senior researcher, Leisan Amirovna Akhmetzyanova, postgraduate student, leading engineer
Federal State Unitary Enterprise "All-Russian Research Institute of Flow Metering" (FGUP "VNIIR") 7a, Vtoraya Azinskaya str., Kazan, 420088, Republic of Tatarstan, Russian Federation, e-mail: office@vniir.org
Sergey Vladimirovich Petrov, Director
LLC "BRIZ" 156, office 32, Dekabristov str., Kazan, 420080, Republic of Tatarstan, Russian Federation, e-mail: petrov_1972@mail.ru
The paper presents a mathematical model of reproduction of a gas-liquid flow in technological devices of mass flow standards of gas-liquid mixtures. The mathematical model allows to calculate the systematic error resulting from the transfer of the mass flow unit of the gas-liquid mixture from the standard to multiphase installations and flowmeters. The calculation provides identification of the main factors associated with the gas-liquid mixture separation in the standards of mass flow rate of the gas-liquid mixture of open and closed type, affecting the systematic error. The technical solutions that will reduce this error as well as the fact that in the absence of the uniform recommendations for the development of mass flow rate standards of gas-liquid mixtures, it is impossible to provide a zero systematic error are shown.
Keywords: calculation algorithm; reproduction; gas-liquid flow; channel; transmission of measurement units; error; test stand; flow structure; standard.
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UDC 654.026 DOI: 10.33285/0132-2222-2019-10(555)-39-49
CLASSIFICATION OF NETWORK PROTOCOLS WITH APPLICATION
Roman Nikolaevich Ermakov, Cand. of biol. sci., engineer
JSC "NII "Mashtab" 5, Letter A, Kantemirovskaya str., St.-Petersburg, 194100, Russian Federation, e-mail: r.ermakov@mashtab.org
This paper presents a new effective approach to analyzing network traffic in order to determine the protocol of application-layer information exchange The structure of the algorithm for classifying network packets by belonging to one of the known network protocols (TLSv1, TLSv1.2, HTTP, SSH v2, DNS, DHCP v6, etc.) is briefly described. To define the protocol, the principle of high-speed one-packet classification is used, which consists of analyzing the information transmitted in each particular packet. The elements of behavioral analysis are used, namely, the transition states of information exchange protocols are classified, which allows to achieve a higher level of accuracy of classification and a higher degree of generalization in new test samples. Fuzzy logic algorithms and neural networks are used. The test results of the constructed software module capable of identifying network protocols for information exchange are demonstrated.
Keywords: network packets classification; artificial neural networks; logistic regression; machine learning; network traffic analysis; in-depth packet analysis.
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NATIONAL UNIVERSITY OF OIL AND GAS "GUBKIN UNIVERSITY" |