ISSN 1999-6934

Scientific-technical journal

EQUIPMENT AND TECHNOLOGIES

FOR OIL AND GAS COMPLEX

                                                                                                      published since 2001

October 2018                                        ¹ 5                                   6 issues per year

 

CONTENÒS

 

MACHINERY AND EQUIPMENT

 

Petrovsky E.A., Bashmur K.A., Terasmes K.S. Improving reliability of valve protective devices by applying the method of a system element redundancy (p. 5‑10)

 

Rizvanov R.G., Sharafiev R.G., Mubinov D.M., Davletov O.B., Galeev E.R., Yakupov V.M. Application of the finite-element analysis system for developing and studying the unit with a mixer (p. 11‑15)

 

Arslanov I.G., Yagafarova Kh.N. Specific features of use of continuous gyroscopic inclinometer (p. 16‑19)

 

Gabdrakhimov M.S., Zaripova L.M. Full-hole down-hole valve of a plunger-type pump (p. 20‑23)

 

Bogomolov R.M., Serikov D.Yu. Improvement of the cutting structures of the rolling cutter drill bits (p. 24‑28)

 

Yanturin A.Sh., Akhmetzyanov I.I., Yanturin R.A., Zainullin A.F. The influence of the longitudinal oscillation damper location on the rod string fatigue resistance (p. 29‑36)

 

Gareev A.A. To the problem of saline deposition prediction in electric submersible pumping (ESP) units (p. 37‑42)

 

MATERIALS AND REAGENTS

 

Dokichev V.A., Fakhreeva A.V., Voloshin A.I., Gusakov V.N., Ishmiyarov E.R., Grabovsky S.A. Natrium salt of carboxymethyl cellulose as a basic reagent for creating a line of "green" oilfield reagents (p. 43‑48)

 

Ismagilov R.N., Sorokin M.A., Pristansky A.G., Eremina L.N., Zyryanov D.A. Quality control of lubricating oils quality during their use in gas-compressor units at the objects of LLC "Gazprom dobycha Urengoy" (p. 49‑53)

 

NEW METHODS AND TECHNOLOGIES

 

Povzhik P.P., Demyanenko N.A., Serdyukov D.V., Zhuk I.V., Marmylev I.Yu. Experience of hydrodynamic methods application to enhance oil recovery in carbonate formations of the Belarus Republic (p. 54‑61)

 

Koryakin A.Yu., Dikamov D.V., Tipugin A.A., Galeev R.T., Kondratev K.I. Experience of applying a gas well operation technology by concentric lift strings in Urengoy oil-gas-condensate field (p. 62‑65)

 

Klakovich O.V., Cherkashin A.A. Application of the predicting mathematical model to control gas transmission units (p. 66‑70)

 

Kolonskikh A.V., Mavletov M.V., Mikhaylov S.P., Murtazin R.R. Prediction of the residual water saturation value of terrigenous hydrophilic rocks by the standard complex of wells geophysical studies (p. 71‑74)

 

PIPELINE TRANSPORT

 

Zavyalov A.P., Sokolinsky L.I., Zaretsky A.S. Diagnostic service of oil and gas objects at the stage of design (p. 75‑78)

 

Kucheryavy V.I., Milkov S.N. Influence of plastic deformations of ground base on an oil pipeline operation under condensation bending (p. 79‑82)

 

 

Information on the articles

 

UDC 621.183.38          DOI: 10.30713/1999-6934-2018-5-5-10

 

IMPROVING RELIABILITY OF VALVE PROTECTIVE DEVICES
BY APPLYING THE METHOD OF A SYSTEM ELEMENT REDUNDANCY (p. 5)

 

Eduard Arkadievich Petrovsky, Dr. of tech. sci., Professor of Institute of Petroleum and Natural Gas Engineering,

Kirill Alexandrovich Bashmur, senior lecturer of Institute of Petroleum and Natural Gas Engineering,

Kirill Sergeevich Terasmes, master’s student of Institute of Petroleum and Natural Gas Engineering

 

Siberian Federal University

82, bld. 6, Svobodny prosp., Krasnoyarsk , 660041, Russian Federation,

e-mail: bashmur@bk.ru

 

To provide protection from the excess pressure on technological units with high unit capacity, pilot-operated safety valves (POSV) are used. They differ from the safety spring valves by higher flow rate and high impermeability with the setting pressure. Moreover, POSV have less reliability because of the complex structure, their reliability depending on workability of both pilot and main valves.

The pilot valve controlling the whole preventive system has still been a drawback of the POSV. It is topical during some technological processes with high temperature, e. g. in crude oil and gas refining, because a sensor service life decreases sharply at high temperature.

The ways of improving reliability of pilot-operated safety valves (POSV) by means of valve sensor redundancy by the system with metal bellow are considered in the article. The reliability of virgin and redundant systems at various temperatures is analyzed.

 

Keywords: reliability; safety valve; pilot valve; pilot-operated safety valve; metal bellow.

 

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UDC 66.036.8          DOI: 10.30713/1999-6934-2018-5-11-15

 

APPLICATION OF THE FINITE-ELEMENT ANALYSIS SYSTEM
FOR DEVELOPING AND STUDYING THE UNIT WITH A MIXER (p. 11)

 

Rif Garifovich Rizvanov, Dr. of tech. sci., Professor,

Robert Garafievich Sharafiev, Dr. of tech. sci., Professor,

Dubaf Munirovich Mubinov, Cand. of tech. sci., assistant professor,

Oleg Borisovich Davletov, senior lecturer,

Emil Ranisovich Galeev, magistrant,

Vagizayn Minnigaleevich Yakupov, assistant professor

 

Ufa State Petroleum Technological University

1, Kosmonavtov str., Ufa, 450062, Republic of Bashkortostan, Russian Federation,

e-mail: rifriz@mail.ru, sharafiev47@mail.ru, davolegus@mail.com, emilgalee@gmail.com

 

The description and operation principle of a mixing unit on a frame-hinged basis is presented. The experimental influence of the blades position on the mixing power in the model unit is considered. A numerical formulation of the problem applying the method of the computational grid rotation is described. The results of application of the ANSYS Fluent finite-element analysis system for determining the main characteristics of mechanical mixing are presented. The convergence of the numerical and experimental calculations is estimated.

 

Keywords: mixer; model; mixing; ANSYS; torque; output.

 

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UDC 622.243.272          DOI: 10.30713/1999-6934-2018-5-16-19

 

SPECIFIC FEATURES OF USE
OF CONTINUOUS GYROSCOPIC INCLINOMETER (p. 16)

 

Ismagil Ganeevich Arslanov, Dr. of tech. sci., Professor,

Khafiza Nurgalievna Yagafarova, Cand. of philosoph. sci., associate professor

 

Ufa State Petroleum Technological University, a branch in the city of Oktyabrsky

54a, Devonskaya str., Oktyabrsky, 452600, Republic of Bashkortostan, Russian Federation,

e-mail: yagafarova-kh@mail.ru

 

The main type of the equipment used when conducting exploration by wells drilling method are continuous gyroscopic inclinometers that provide geophysical researches aimed at search for oil and gas reserves. Among the introduced equipment a special place is occupied by gyroscopic devices designed to measure deviations of the wells trajectory from the planned direction.

The article considers the continuous gyroscopic inclinometers, special attention is paid to the device and the principle of the gyroscopic unit operation. On the example of IGN 73-100/80 inclinometer operation, the authors give the characteristic features of inclinometers use by "Tyumenpromgeofizika" production company when drilling directional exploration wells in Malobalyk oil field in the Western Siberia. The article identified and presents operational indicators that directly affect the quality and accuracy of the measurements made by inclinometers, such as the nature of the device’s speed and movement along the wellbore, the difference in the ambient temperature at the well bottom and inside the device, the parameters measurements accuracy in the areas of the device’s descent and assent. The use of centralizers as well as the maximum possible speed of the device’s descent or assent that minimize the occurrence of skew and meet the current safety requirements when conducting wells’ inclinometric researches are substantiated.

 

Keywords: exploration well; continuous gyroscopic inclinometer; gyroscopic unit; information sensor; speed of movement; skew; measurement; error.

 

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UDC 622.276.53.054.22          DOI: 10.30713/1999-6934-2018-5-20-23

 

FULL-HOLE DOWN-HOLE VALVE OF A PLUNGER-TYPE PUMP (p. 20)

 

Mavlitzyan Sagityanovich Gabdrakhimov, Dr. of tech. sci., Professor,

Liliya Mavlitzyanovna Zaripova, Cand. of tech. sci., assistant professor

 

Ufa State Oil Technological University, a branch in the city of Oktyabrsky

54a, Devonskaya str., Oktyabrsky, 452600, Republic of Bashkortostan, Russian Federation,

å-mail: lilyabert31@mail.ru

 

Oil production by means of sucker-rod pumps is the most common way of oil recovery, being explained by their simplicity, efficiency and reliability. At least two-thirds of the existing production wells are operated by sucker-rod pumps.

The article describes the construction of the updated full-hole valve. The valve body is made together with the seat and stop. The valve body in its lower part has windows for liquid suction and thread for pump connection in its upper part. The gate is sealed by a rubber monolithic element reinforced by high-strength material. The smaller diameter of the specified seal is 1 mm smaller than the lower diameter of the seat. The gate seal fastening is carried out by a threaded connection of the clamp and the gate. To limit the height of lifting and to ensure the initial pressing of the gate, the valve body has a stop in its bottom part, the gate – screw. The rotation of the gate during landing is provided by the blades mounted obliquely on the clamp.

The advantages of the new full-hole valve in comparison with the serial ball valve are given.

 

Keywords: ball valve; full-hole valve; paraffining; sucker-rod pump; suction valve; high viscosity fluids; abrasive; discharge valve; uniform wear out.

 

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UDC 622.24.051.55          DOI: 10.30713/1999-6934-2018-5-24-28

 

IMPROVEMENT OF THE CUTTING STRUCTURES
OF THE ROLLING CUTTER DRILL BITS (p. 24)

 

Rodion Mikhailovich Bogomolov, Dr. of tech. sci., Professor

 

Samara State Technical University

244, Molodogvardeiskaya str., Samara, 443100, Russian Federation

 

Dmitry Yurievich Serikov, Cand. of tech. sci., assistant professor

 

Gubkin Russian State University of Oil and Gas (NRU)

65, Leninsky prosp., Moscow, 119991, Russian Federation,

e-mail: serrico@rambler.ru

 

Polycrystalline Diamond Cutter (PDC) bits have made a true breakthrough in deep drilling and have provided multiple increase of the average footage per bit and mechanical speed of drilling. It allowed to sharply accelerate and cheapen the drilling of deep wells, to increase the volumes of oil and gas production. However, PDC bits are practically ineffective when drilling hard, strong and very strong abrasive rocks, where rolling cutter drill bits are more effective. The use of rolling cutter drill bits with bearing supports requires a much smaller torque, compared to PDC bits of the cutting type. To ensure the increased torque and to maintain the forced drilling modes, expensive equipment of higher productivity and capacity is required. The use of such equipment is characterized by increased energy consumption, additional fuel consumption, additional costs for its delivery and storage. The kinetic energy spent on drilling is in geometrical progression from the magnitude of the bit rotation moment. The drilling cost increase discards the construction of low-profit and injection wells from the "drilling mat", which in turn violates deposits development projects and leads to irrational oil and gas production. Therefore, the need to introduce energy-saving technologies into drilling, the calculation of the "golden mean" – the economic balance of rock destruction technologies and the optimization of drilling programs, the use of mobile drilling rigs with a pumping group based on the principle of "reasonable sufficiency" and insignificant investments in technological equipment becomes evident. Drilling programs should provide a combination of rolling-cutter drill bits and PDC bits. These arguments cause the need of further improvement of development and production of already mastered hundreds of standard sizes of rolling cutter drill bits.

 

Keywords: rolling cutter drill bits; teeth cutting structures; calibrating cone; stiffener.

 

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UDC 622.276          DOI: 10.30713/1999-6934-2018-5-29-36

 

THE INFLUENCE OF THE LONGITUDINAL OSCILLATION DAMPER LOCATION
ON THE ROD STRING FATIGUE RESISTANCE (p. 29)

 

Alfred Shamsunovich Yanturin, Dr. of tech. sci., Professor

 

Ufa State Petroleum Technological University

1, Kosmonavtov str., Ufa, 450062, Republic of Bashkortostan, Russian Federation,

e-mail: Yanturin2@yandex.ru

 

Ilvir Ilshatovich Akhmetzyanov, Chief of the Work Shop

 

JSC "Surgutneftegaz"

1, G. Kukuevitsky str., Surgut, 628415, Khanty-Mansi autonomous territory, Tyumen region, Russian Federation,

e-mail: ahmet_ii@mail.ru

 

Ruslan Alfredovich Yanturin, Cand. of tech. sci., Director

 

LLC "Soltubi"

5, Bratya Kadomtsevy str., Ufa, 450059, Republic of Bashkortostan, Russian Federation,

e-mail: Yanturin1@yandex.ru

 

Albert Faritovich Zainullin, Head of the Department

 

LLC "BashNIPIneft"

86/1, Lenin str., Ufa, 450006, Republic of Bashkortostan, Russian Federation,

e-mail: zaynullinaf@mail.ru

 

The article presents calculations of the rod strings for fatigue strength under the pulsating loading cycles corresponding to the main and the most affected part of the string when installing the longitudinal oscillations vibration damper of rods under the polished rod and above the pump plunger, i. e. with a minimum and maximum effect on the increase in the intensity of the rods fatigue failure in an arbitrary cross-section along the length of the string. Kinematic schemes of some constructions of longitudinal oscillations vibration dampers are given.

Based on axial loads dynamograms, under different values of the fluid dynamic level between the tubing and casing columns, an example of calculation for the upper part of the rod string is considered for the inclined well of the Western Siberia (the Jurassic deposits).

The solution given in the example confirms the rationality of the installation place of the damper in the area where the waves of the rod string longitudinal oscillations are formed, i. e. above the pump plunger or, better, the junction point of the vibration damper with the pump itself. In the latter case, it becomes possible to further reduce the hydraulic resistance of the near-well zone of the productive reservoir, i. e. increase of a well production. Also, to a certain extent, the neutralization of the difference in the changes values of the relative elastic elongations (according to Hooke) of the tubing and rod strings is provided.

 

Keywords: rod column; axial loads; fatigue strength; tubing; tensile diagrams.

 

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UDC 622.276.054.23          DOI: 10.30713/1999-6934-2018-5-37-42

 

TO THE PROBLEM OF SALINE DEPOSITION PREDICTION
IN ELECTRIC SUBMERSIBLE PUMPING (ESP) UNITS (p. 37)

 

Adib Akhmetnabievich Gareev, Cand. of tech. sci., the 2nd category engineer of "Nizhnesortymskneft" Oil and Gas Production Department

 

JSC "Surgutneftegaz"

12, Entuziastov str., Nizhnesortymsky settlement, 628447, Surgutsky district, Khanty-Mansi Autonomous territory – Yugra, Tyumen region, Russian Federation,

e-mail: adibg@mail.ru

 

Studies of temperature mode and salt deposition are a logical continuation of the works, previously performed by the author, that deal with modern problems of oil production by centrifugal pumps. It is shown that by controlling the technological parameters of a centrifugal pump operation, it is possible to exclude the scaling process in the pump units. Practical significance of the study of a centrifugal pump temperature regime when fighting against complications such as salt depositions is shown.

 

Keywords: ESP operation; salt deposits in ESP units; scaling control.

 

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UDC 547.874.7:54.4          DOI: 10.30713/1999-6934-2018-5-43-48

 

NATRIUM SALT OF CARBOXYMETHYL CELLULOSE AS A BASIC REAGENT
FOR CREATING A LINE OF "GREEN" OILFIELD REAGENTS (p. 43)

 

Vladimir Anatolievich Dokichev, Dr. of chem. sci.,

Alexander Iosifovich Voloshin, Dr. of chem. sci.,

Viktor Nikolaevich Gusakov, Cand. of chem. sci.,

Emil Robertovich Ishmiyarov, Cand. of chem. sci.

 

LLC "RN–UfaNIPIneft"

3/1, Bekhterev str., Ufa, 450013, Republic of Bashkortostan, Russian Federation,

e-mail: dokichev@anrb.ru, voloshinai@ufanipi.ru

 

Alsu Venerovna Fakhreeva, post-graduate student,

Stanislav Anatolievich Grabovsky, Cand. of chem. sci.

 

Ufa Institute of Chemistry Russian Academy of Sciences

71, Oktyabrya prosp., Ufa, 450054, Republic of Bashkortostan, Russian Federation

 

The influence of natrium sodium of carboxymethylcellulose (NaCMC) on the scaling of CaCO3, CaSO4 and BaSO4 on the stainless-steel surfaces in the supersaturated aqueous solution at 80 °C is investigated. As a result of specific adsorption, NaCMC, on the emerging crystal faces, inhibits aggregation processes, agglomeration processes and calcium carbonate scaling, calcium sulphate and barium sulphate, also NaCMC provokes reduction of the salt crystals size and change of their structure. It is established, that polysaccharide slows down the speed and changes the conditions of the gas hydrate formation, exhibiting properties of thermodynamic and kinetic inhibitor with the efficiency that, being used in the same dosages, 30…450 times exceeds the methanol one. The obtained results prove the fact that development of new "green" complex-action reagents based on sodium carboxymethylcellulose are perspective for use in oil and gas production.

 

Keywords: "green" chemistry; sodium carboxymethylcellulose; calcium carbonate; calcium sulphate; barium sulphate; scale inhibitor; gas hydrate formation inhibitor; oil production.

 

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UDC 665.765-404(083.74)          DOI: 10.30713/1999-6934-2018-5-49-53

 

QUALITY CONTROL OF LUBRICATING OILS QUALITY
DURING THEIR USE IN GAS-COMPRESSOR UNITS AT THE OBJECTS
OF LLC "GAZPROM DOBYCHA URENGOY" (p. 49)

 

Rustam Nailevich Ismagilov, Cand. of tech. sci., Deputy-General Director (production),

Mikhail Alexandrovich Sorokin, Chief of Production Department (operation of gas booster stations and gas cooling stations),

Andrey Grigorievich Pristansky, Deputy-Chief of Production Department (gas production and preparation for transportation),

Lyudmila Nikolaevna Eremina, Chief of the Department (physical-chemical researches of the Engineering-Technical Center),

Dmitry Anatolievich Zyryanov, Deputy-Chief of the Department (physical-chemical researches of the Engineering-Technical Center)

 

LLC "Gazprom dobycha Urengoy"

8, Zheleznodorozhnaya str., Novy Urengoy, 629307, Yamalo-Nenets autonomous territory, Russian Federation,

e-mail: r.n.ismagilov@gd-urengoy.gazprom.ru, m.a.sorokin@gd-urengoy.gazprom.ru,
a.g.pristanskiy@gd-urengoy.gazprom.ru, l.n.eremina@gd-urengoy.gazprom.ru,
d.a.zyryanov@gd-urengoy.gazprom.ru

 

Quality control of lubricating oils during their use in gas-compressor units in accordance with the requirements of STO Gazprom 2-2.4-133-2007. Provision for lubricating oils control at the compressor stations of the gas transportation companies of JSC "Gazprom" is necessary to increase the effective time of gas-compressor unit operation, timely failures identification at the early stage before they lead to serious breakdowns and unplanned downtime of the equipment.

 

Keywords: testing laboratory; gas-compressor unit; quality control of lubricating oils; Òp-22Ñ turbine oil; ÌS-8P aviation oil.

 

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UDC 622.276.4:622.276.6          DOI: 10.30713/1999-6934-2018-5-54-61

 

EXPERIENCE OF HYDRODYNAMIC METHODS APPLICATION
TO ENHANCE OIL RECOVERY IN CARBONATE FORMATIONS
OF THE BELARUS REPUBLIC (p. 54)

 

Petr Petrovich Povzhik, Cand. of tech. sci., assistant professor, Deputy-General Director for Geology,

Dmitry Vyacheslavovich Serdyukov, Head of oil fields development department of "Rechitsaneft" Oil and Gas Production Department,

Ilya Viktorovich Zhuk, Head of group for project documents support of oil fields development department of "Rechitsaneft" Oil and Gas Production Department,

Igor Yurievich Marmylev, geologist of group for project documents support of oil fields development department of "Rechitsaneft" Oil and Gas Production Department

 

"Belorusneft" Production Association

9, Rogachevskaya str., Gomel, 246003, Republic of Belarus,

e-mail: povzhik@beloil.by

 

Nikolay Alexandrovich Demyanenko, Cand. of tech. sci., assistant professor, chief specialist of the Center of fields development technologies

 

LUKOIL–Engineering Limited KogalymNIPIneft Branch Office in Tyumen

143a, Respublika str., Tyumen, 625000, Russian Federation

 

The article describes the experience of application of hydrodynamic and complex physical-hydrodynamic methods of oil recovery enhancement (EOR) in carbonate reservoirs of the Belarus Republic. The criteria of the methods applicability are determined and recommendations on EOR improvement are given. The tested methods of EOR allow to raise the efficiency of reserves recovery, increase the final value of the oil recovery factor by involving the incompletely recovered zones and areas located in already water-flooded formations into development. It is possible to replicate the technology in oil producing carbonate formations.

 

Keywords: oil recovery enhancement; hydrodynamic impact; complex physical-hydrodynamic impact; non-stationary water flooding; EOR; oil recovery factor.

 

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UDC 622.279+622.245          DOI: 10.30713/1999-6934-2018-5-62-65

 

EXPERIENCE OF APPLYING A GAS WELL OPERATION TECHNOLOGY
BY CONCENTRIC LIFT STRINGS IN URENGOY OIL-GAS-CONDENSATE FIELD
(p. 62)

 

Alexander Yurievich Koryakin, General Director,

Dmitry Vladimirovich Dikamov, Chief engineer, the first Deputy-General Director,

Anton Alexandrovich Tipugin, Deputy-Chief of Center of Innovative Development and Perspective Planning,

Rustam Talgatovich Galeev, Chief of Field Geology Department,

Konstantin Igorevich Kondratev, Chief of the Laboratory of Geological-Technological Modeling

 

LLC "Gazprom dobycha Urengoy"

8, Zheleznodorozhnaya str., Novy Urengoy, 629307, Yamalo-Nenets autonomous territory, Russian Federation,

e-mail: e.f.tanchuk@gd-urengoy.gazprom.ru, a.s.koval@gd-urengoy.gazprom.ru,
a.a.tipugin@gd-urengoy.gazprom.ru, r.t.galeev@gd-urengoy.gazprom.ru,
k.i.kondratiev@gd-urengoy.gazprom.ru

 

The Cenomanian deposit of Urengoy field is operated at the latest stage of its development. The reservoir pressure and wells flow rates decrease is the reason for their stoppage due to the liquid accumulation in well bottom zones. The article presents the experience of well 514 operating as that is equipped with concentric lift strings. This technology is optimal for operation at the final stage of gas deposits development, especially in case of the descent of an additional lift string without a well damping. The results of analytical and field studies have proved the fact that as the reservoir and well bottom pressure changes, the well requires correction of its operational mode to maintain the maximum possible production rate.

 

Keywords: concentric lift string; central lift string; inter-ring space; minimum required speed; well’s "self-shutting off"; low production rate gas well.

 

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UDC 681.5.017          DOI: 10.30713/1999-6934-2018-5-66-70

 

APPLICATION OF THE PREDICTING MATHEMATICAL MODEL
TO CONTROL GAS TRANSMISSION UNITS (p. 66)

 

Oleg Vladislavovich Klakovich, the 1st category engineer, Technical Department of Administration

 

LLC "Gazprom dobycha Urengoy"

8, Zheleznodorozhnaya str., Novy Urengoy, 629307, Yamalo-Nenets autonomous territory, Russian Federation,

e-mail: o.v.klakovich@gd-urengoy.gazprom.ru

 

Alexander Alexandrovich Cherkashin, leading engineer for control-measuring tools and automation of Urengoy Gas Production Department

 

LLC "Gazprom dobycha Urengoy"

19, 26th Congress of CPSU, Novy Urengoy, 629307, Yamalo-Nenets autonomous territory, Russian Federation,

e-mail: a.a.cherkashin@gd-urengoy.gazprom.ru

 

The paper considers the simplified structure of gas compressor units (GCU), presents the main technological parameters that affect the operation of the gas compressor unit, analyzes the effect of ambient air temperature on the GCU operation mode, examines the international experience when solving a number of problems that is to optimize the operating mode of compressor units, including the algorithms of technological processes updated control, including the load distribution on the gas transport network, the units safety analysis, application of the generalized mathematical model of a formation, wells, the gas gathering network and technological objects of the booster compressor station. The sequence of stages of GCU updated control introduction in production is proposed.

 

Keywords: gas compressor unit (GCU); technological process updated control; GCU generalized structure; GCU operation efficiency.

 

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UDC 622.276.031.011.433:550.832          DOI: 10.30713/1999-6934-2018-5-71-74

 

PREDICTION OF THE RESIDUAL WATER SATURATION VALUE
 OF TERRIGENOUS HYDROPHILIC ROCKS BY THE STANDARD COMPLEX
OF WELLS GEOPHYSICAL STUDIES (p. 71)

 

Alexander Valerievich Kolonskikh, Cand. of tech. sci.,

Marat Venerovich Mavletov, Cand. of phys.-math. sci.,

Sergey Petrovich Mikhaylov,

Ramil Ravilevich Murtazin, Cand. of phys.-math. sci.

 

LLC "RN–UfaNIPIneft"

3/1, Bekhterev str., Ufa, 450013, Republic of Bashkortostan, Russian Federation,

e-mail: KolonskikhAV@ufanipi.ru, MavletovMV@ufanipi.ru, MikhaylovSP@ufanipi.ru, MurtazinRR@ufanipi.ru

 

The problem of predicting the rocks’ residual water-saturation value by the data of core samples laboratory studies by applying the methods of semipermeable membrane and centrifugation, special method of nuclear magnetic logging and standard gamma-ray logging methods is considered. Advantages and disadvantages of each of the methods under consideration are indicated. The reasons for limiting the use of core data for prediction of rocks residual water-saturation, namely: the different scale of the study (properties averaging: according to the core data – 3 cm, according to geophysical studies of wells – 40 cm); limited research coverage (only single core samples are subjected to capillarymetric studies, usually, from the best part of the reservoir; clays and rock clay varieties are not investigated as a rule). The gamma logging is chosen out of a set of the standard logging as the optimal GIS method, being the most suitable for predicting the residual water saturation of the rocks, since the gamma log curve characterizes the well’s section by the clay rocks size, which, in its turn, depends on the amount and type of clay minerals that are present in the matrix and cement. An algorithm for constructing the dependence of the residual water saturation of rocks on the data of the standard logging method for terrigenous hydrophilic rocks with a low content of carbonate material in the pore space of the formation is proposed. One of the main points of the algorithm is the identification of lithotypes in the formation section (usually sandstone, clay and carbonate rocks) by core images in day and ultraviolet light. The selection of the dependence of the residual water saturation of rocks on the data of the standard logging method is implemented individually for three lithotypes: sandstone, clay and transition differences. The intervals of carbonized rocks are not considered.

 

Keywords: residual water saturation; gamma-ray logging; effective pore radius.

 

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UDC 622.691.4+622.692.4:621.51          DOI: 10.30713/1999-6934-2018-5-75-78

 

DIAGNOSTIC SERVICE OF OIL AND GAS OBJECTS
AT THE STAGE OF DESIGN (p. 75)

 

Alexey Petrovich Zavyalov1, Cand. of tech. sci., assistant professor,

Leonid Isaakovich Sokolinskiy1, 2, Cand. of tech. sci., Professor of the Department of Thermodynamics and Heat Engines, Chief mechanical engineer of ITC "Orgtechdiagnostika" JSC "Gazprom orgenergogaz",

Alexander Sergeevich Zaretsky2, Deputy-Chief of ITC "Orgtechdiagnostika" JSC "Gazprom orgenergogaz"

 

1 Gubkin Russian State University of Oil and Gas (National Research University)

65, bld. 1, Leninsky prosp., Moscow, 119991, Russian Federation,

e-mail: zavyalovap@yandex.ru, Sokolinskiy@oeg.gazprom.ru;

 

2 JSC "Gazprom orgenergogaz"

11, Luganskaya str., Moscow, 115304, Russian Federation,

e-mail: Zaretsky@oeg.gazprom.ru

 

The article considers the influence of design solutions quality on the operational reliability of the equipment and pipelines in the oil and gas industries. The statistical data, proving the fact that most of the real projects of construction and reconstruction of oil and gas facilities, considered by the authors, contain suboptimal design solutions are given. Non-optimal design solutions provoke the risks of emergency failures during operation, lead to an increase in the maintenance and repair volumes of equipment and pipelines. The importance of the expertise of oil and gas facilities construction and reconstruction projects is shown as an effective way to increase their operational reliability and prevent the implementation of suboptimal design solutions. The experience shows that the execution of works on the projects expertise provides a significant economic effect, both direct, associated with the simplification of the piping design and the saving of material and technical resources and the reduction in the amount of construction and installation work, and an indirect one, associated with the increased operational reliability and technological efficiency of production.

 

Keywords: oil and gas production; technical diagnostics; repair; design; structural reliability; operational reliability; expertise; economic effect.

 

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UDC 622.692.4:624.072.3.04:681.3          DOI: 10.30713/1999-6934-2018-5-79-82

 

INFLUENCE OF PLASTIC DEFORMATIONS
OF GROUND BASE ON AN OIL PIPELINE OPERATION
UNDER CONDENSATION BENDING (p. 79)

 

Vasily Ivanovich Kucheryavy, Dr. of tech. sci., Professor,

Sergey Nikolaevich Milkov, Cand. of phys.-math. sci., assistant professor

 

Ukhta State Technical University

13, Pervomaiskaya str., Ukhta, 169300, Komi Republic, Russian Federation,

å-mail: srg55m@mail.ru

 

The calculation model of joint deformation of a ground base – oil pipeline system, based on the solution of the differential equation of the oil pipeline settling during bending with compression, with account of the limiting resistance of the ground in its plastic stage is developed. The model made it possible to adequately assess the stress-strain state of the oil pipeline section laid in low-lying wetland with account of its plastic deformations. Experimental values of the ultimate ground resistance in its plastic stage are set by radargram processing of ground base – oil pipeline system. Based on the mathematical theory of experiment planning, a nonlinear model in the form of a quadratic polynomial is obtained, which allows to predict the maximum deformation of a pipeline’s unstable ground base caused by its weight and the weight of the filling soil, depending on the ground deformation modulus and the angle of internal friction.

At the same time, experimental data of geo-radiolocation monitoring of the ground base – oil pipeline system were used. In this case, the change in the characteristics of the soil, due to the changes of its seasonal state, for example thawing, freezing in the near-pipe zone was established by the frequency range of the reflected radio waves. The comparability of the calculated and maximum precipitation of an oil pipeline settling in unstable low-weight ground allowed to take proactive measures to ensure its stability during bending with compression and to determine the sections of the route where it is necessary to install additional ballasting devices for securing the oil pipeline. With the increasing complexity of engineering-geological conditions of the pipeline route, the parameters of the settling of unstable non-cohesive soil bases increase, and, in the state of plasticity, they can have defects that lead to their destruction, in connection with the ground structure change. Based on this fact, the method of assessing the ground base strength reliability by the criterion of the biaxial stress state, with account the ground specific adhesion with the pipeline and its angle of internal friction is proposed. This led to an increase in the efficiency of the ground base – oil pipeline system.

 

Keywords: oil; soil basis; bending and compression; deformation; deflection equation; modulus of elasticity; bending just a moment.

 

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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY"

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