Equipment and Technologies for Oil and Gas Complex

The article suggests some method of gas-lift wells operation by a multistage gas-lift. Each stage works independently. Differentiated approach to choosing the lifting pipes length allows operating wells with the least losses. Sequential lifting of liquid from one level to the other one is done by means of working agent’s alternative injection into the annuals and circular space in case of presence of a separating backpressure valve in the educator in the lift. The educator breaks the lift into sequential cascades (stages) of liquid lifting and provides independence of their work, herewith, the height of liquid lifting at each stage (cascade) defines pressure valve of working agent injection. Numerical estimation of a single- and multistage lifts operation is submitted.

Key words: gas-lift wells; low down hole pressure; multistage gas-lift; liquid column height in a lift; injection of working agent; annuals and circular area; back pressure valve – breaker of stages.

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UDC 62-213.6

QUALITY OF CASTED BODY PARTS

OF SHUT-OFF VALVES AND PUMPS (p. 8)

Maxim Nikolaevich Kazantsev,

Ilya Alexandrovich Flegentov,

Oleg Yurievich Zhevelev

LLC "Research Institute of Transneft"

47a, Sevastopolsky prosp., 117186, Moscow, Russian Federation,

e-mail: KazancevMN@niitnn.transneft.ru, FlegentovIA@niitnn.transneft.ru, ZhevelevOY@niitnn.transneft.ru

This article provides information about the failures of shut-off valves and pumps at the facilities of PJSC "Transneft" due to poor quality of manufacture of casted body parts. The basic types of manufacturing casting defects as well as defects allowed by the manufacturer, when correcting them and which caused failures are discussed.

The following joint activities of PJSC "Transneft" and the manufacturers of the equipment are considered:

– inspections of casting industry of manufacturers of shut-off valves and pumping equipment;

– analysis of documents regulatory requirements to steel castings;

– joint activities with the manufacturers of shut-off valves and pumping equipment aimed at improving the quality of the body parts casting;

– development of PJSC "Transneft" normative documents, regulating the requirements for casted body parts of valves and pumps.

The results of the measures implementation to improve the casting quality of body parts of shut-off and pumping equipment to be delivered to the facilities of PJSC "Transneft" are presented.

Key words: castings; quality; body parts; shut-off equipment; pumps; casting defects; correction of defects.

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UDC 628.312

EFFECT OF THE SUSPENDED SOLIDS AMOUNT

IN THE PUMPED WATER ON WELLS’ INJECTIVITY (p. 15)

Marat Davletovich Valeev

LLC "Research and Production Enterprise "VM-system"

46, Beregovaya str., 450516, Kumlekul, Ufa region, Republic of Bashkortostan, Russian Federation,

e-mail: 2743235@bk.ru

Ibrahim Izmailovich Abyzbaev

"Ufa State Oil Technical University"

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

e-mail: 420934@mail.ru

Arthur Ramilevich Fakhriev

LLC "RN-Vankor"

15, 78^th Dobrovolcheskaya brigada str., 660077, Krasnoyarsk, Krasnoyarsk territory, Russian Federation,

e-mail: tatarinfahr@mail.ru

The article analyses the causes of the pore space mudding of a formation bottomhole area and the reduction of the of injection wells’ water-intake capacity, proved by the pressure drop curves. It is found out that a considerable amount of suspended particulate matter is collected in surge tanks, thus being the source of penetration of water with a high content of mechanical impurities into the inlet of block cluster pumping station. The high content of suspended solid particles in the injection water adversely affects the state of pumping equipment as well as reduces injection wells’ water-intake capacity. It is shown that the poor preparation of the water in view of suspended solids presence causes increased wear-out of pumping equipment and leads to its failure at block cluster pumping stations.

Key words: water-intake capacity; injection well; mechanical impurities; suspended solids; petroleum products; reservoir pressure maintenance; quality of the injected water; pressure drop curve; mudding; block cluster pumping station.

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UDC 622.276.63

PRACTICAL EXPERIENCE OF CONTROLLED ACID TREATMENT

OF CARBONATE RESERVOIRS USING SELF-DEVIATING ACID SYSTEM (p. 21)

Dmitry Viktorovich Tkachev,

Gennady Gennadyevich Pechersky,

Yulianna Ravilievna Kuskildina,

Aleksandr Ivanovich Gavrilenko

Production association "Belorusneft", BelNIPIneft

15b, Knizhnaya str., 246003, Gomel, Republic of Belarus,

e-mail: d.tkachev@beloil.by

The paper presents the results of laboratory and field testing of the advanced technology of acid treatment using self-deflecting acid systems on the basis of hydrochloric acid solution and composition of visco-elastic SAA (agent Katol-40). The dependencies of rheological characteristics of self-deflecting acid system and acid concentrations and temperatures are determined. Selectivity of stimulation of the studied self-deflecting system in geophysical conditions of Belarusian oil fields with formation of deflecting material mainly in washed watercut channels is shown. General technical and technological approaches to undertake field tests on the oil fields of the Republic of Belarus are described; implementation efficiency factors are given. The list of potential targets in Pripyat downfold for further development of the technology is provided.

Key words: carbonate reservoir; bottom-hole area treatment; acid treatment; deviation of acid composition; selectivity of stimulation; self-deviating acid system; visco-elastic SAA.

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UDC 622.276.6

DOWNHOLE OSCILLATORS OF PRESSURE FLUCTUATIONS

FOR OIL RECOVERY ENHANCEMENT (p. 27)

Yakov Isaakovich Kravtsov¹,

Alexey Allanovich Abdrashitov¹,

Evgeny Alexandrovich Marfin^{1, 2}

¹Kazan Research Center, RAS (KazRC RAS)

2/31, POB 261, Lobachevsky str., 420111, Kazan, Russian Federation,

e-mail: kravtsov_1934@mail.ru, abdary@mail.ru

²Kazan (Pre-Volga) Federal University (KFU)

18, Kremlevskaya str., 420111, Kazan, Russian Federation,

e-mail: marfin_ea@mail.ru

The article is devoted to the problem of oil production enhancement by means of elastic-wave stimulation of a formation. Various alternatives of borehole oscillators of pressure fluctuations for such method application are reviewed. The developed devices are based on the jet-driven Helmholtz oscillator. It represents the hollow cylindrical camera with flat bottoms the front one of which contains an input nozzle and the back one – an exit hole with sharp ridges. It works like the two-uniform device, structurally aggregating two independent devices in one body: the jet oscillator of pressure fluctuations in the pumped fluid and the acoustic resonator boosting the generated fluctuation. The main peculiarities of the patented devices operation with automatic adjustment of the generation resonance mode, with automatic adjustment of generation constant frequency and with generation constant frequency under a formation pressure change are considered. The prospects of such oscillators use when extracting hard-to-recover oil reserves are shown.

Key words: elastic-wave effect; downhole oscillator; fluctuations of pressure; oscillation frequency; oil recovery; resonance.

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UDK 622.276

PHYSICAL PROBLEMS OF A LIQUID PHASE EXTRACTION

WHEN PURIFYING PETROLEUM WASTEWATERS (p. 32)

Sakit Rauf Rasulov,

Lala Vagif Huseynova,

Gulshan Rasul Mustafayeva

Azerbaijan State Oil and Industry University

34, Azadlyg prosp., AZ1010, Baku, Republic of Azerbaijan,

e-mail: rasulovsakit@gmail.ru

The article considers the problems relating to the development of the technology of wastewater cleaning from oil products by the liquid phase extraction method.

It is shown that the liquid phase extraction of asphalt-resin compounds from wastewater is a mass transfer process, going on in the interphase film, which is implemented by a solvent extra-agent dispersion in water and by extraction in a mono-phase film. Efficiency of extractors mass transfer is determined by the solvent drop sizes, obtained by its granulation in mixing conditions. It is revealed, that liquid-phase extraction of asphalt-resin compounds from wastewaters by toluene goes on in conditions of intensive mixing and dispersion conditions providing conditions of turbulent flow isotropy in the extractor.

With account of physical effects important role, going on during liquid phase extraction, it becomes possible to develop the technology of wastewater purification from asphalt-resin substances and solid phase.

Key words: liquid phase extraction; mass transfer; dispersion; solvent; asphalt-resin substances; turbulent flow.

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UDC 622.276.6

ANALYSIS OF THE EFFECTIVENESS OF WAVE MOTION METHOD

APPLICATION IN THE FIELDS OF KRASNODAR TERRITORY IN TERMS

OF ENVIRONMENTAL SAFETY (p. 34)

Alexey Leonidovich Yakovlev

LLC "KNGK Group"

117/1, Budenny str., 350000, Krasnodar, Russian Federation,

e-mail: yakovlev@i-npz.ru

Olga Vadimovna Savenok

Kuban State Technological University

2, Moskovskaya str., 350072, Krasnodar, Russian Federation,

e-mail: olgasavenok@mail.ru

The heterogeneity of reservoir properties both along the section and along the strike results in uneven oil recovery and reduction of oil recovery factor of a layer in the whole. The solution of this problem lies in cracks disclosure by a variety of methods. The article tries to solve the problem by implementing of a set of wave motion operations, supported by the injection of polymer composites. An important distinguishing feature of focused waves is operative obtaining of the results in real time. According to the results of the obtained reflected waves there studied the process of the pore space modification at the points of wave motion. This process is characterized as a random multiplier for which the fixed parameters are the mean value, dispersion and autocorrelation function. These parameters are defined by such geo-medium characteristics as stress state, fracturing, physical and mechanical properties and the type of fluid saturation.

Key words: focused wave action; emulsion-water solution emulsion; additional oil production; submersible source of wave motion; block diagram of the control system.

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UDC 622.004.08+553.984

INNOVATIVE TECHNOLOGIES APPLICATION

WHEN EXTRACTING OIL FROM BITUMINOUS ROCKS (p. 39)

Mikail Kazym Bagirov,

Tarana Yusif Sadygova

Azerbaijan State Oil and Industry University

20, Azadlyg prosp., AZ1010, Baku, Republic of Azerbaijan,

e-mail: h.ibo@mail.ru, tarana_sadigova@mail.ru

Bituminous sands are a major source of alternative energy. However, their use is limited due to environmental and technological problems arising when extracting oil from bituminous deposits. This article proposes a new ecologically-clean technology based on the use of nano-reagents when extracting oil from bituminous rocks.

Key words: bituminous liquid; ecological problems of oil production; oil extraction method; reagent; formation water; washing fluid.

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UDC 622.276.34

HORIZONTAL WELLS FLOW-RATE IN THE FIVE-SPOT DISPERSED

INJECTION WATER-FLOOD SYSTEM (p. 41)

Arslan Valerievich Nasybullin,

Vadim Fagimovich Voykin

"TatNIPIneft" Institute, PJSC "V.D. Shashin Tatneft"

32, M. Jalil str., 423230, Bugulma, Republic of Tatarstan, Russian Federation,

e-mail: arslan@tatnipi.ru, vadim_voykin@tatnipi.ru

The article presents an analytical solution of the problem in relation to calculation of a horizontal well’s production rate in case of conducting of a dispersed injection water-flood system. The formula, derived by the authors of the present article can be used to choose the optimal pattern of wells location both when modernizing the schemes of dispersed injection water-flooding at the later stages of fields’ development and planning the system of new fields’ development.

The formula, in particular, can be used to choose the optimal length of a horizontal well’s drainage area in a reservoir’s production deposit when conducting a five-spot dispersed injection water-flooding. The regularity according to which (for the example, presented in the article) the growth of the horizontal well’s production rate is sharply reduced, if the drainage area length of the horizontal well equals 5…7 parts of the reservoir height is identified.

Key words: horizontal well; areal flooding; choice of system development; inflow equation.

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UDC 622.692+622.07

DETERMINATION OF LONGITUDINAL MECHANICAL STRESSES IN PIPELINE

BASED ON DATA FIBER OPTIC SENSORS FOR MEASURING STRAIN (p. 45)

Rustem Rilievich Islamov

JSC "Transneft-North"

2/1, Zeryunova str., 169313, Ukhta, Republic of Komi, Russian Federation,

e-mail: post@uht.transneft.ru

Yurij Viktorovich Aleksandrov

STROJGAZMONTAZH, LLC

53, Vernadskogo prosp., 119415, Moscow, Russian Federation,

e-mail: aleksandrov_uv@ooosgm.ru

Sergej Sergeevich Gus'kov,

Ruslan Viktorovich Aginej,

Valerij Viktorovich Musonov

Giprogazcentr, JSC

26, Alekseevskaja str., 603950, Nizhny Novgorod, Russian Federation,

e-mail: guskovss@gmail.com, aginey@ggc.nnov.ru, bita-mvv@ggc.nnov.ru

Article gives the results of the work aimed at improving the software of optical fiber monitoring systems of the stress-strain state of underground pipelines. There is offered a universal way to determine longitudinal stresses in a cross-sectional point of the pipeline based on the results of strain measurement at certain points (at an arbitrary angular location of strain measurement points). This research work contains the results of studying regularities of the distribution of mechanical stresses in the longitudinal cross section of the pipeline. Besides this article contains examples of calculating the distribution of stresses in the longitudinal cross section of the pipeline based on the strain data points with a predetermined angular coordinates.

Key words: underground pipeline; the stress-strain state; deformation monitoring system; fiber optic strain sensor; the angular orientation of the sensor; numerical modeling.

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UDC 626.43; 627.33; 551.467; 725.342

NEW OIL TRANSPORTATION INFRASTRUCTURE TECHNOLOGIES

IN THE COASTAL SHELF ZONE OF THE WESTERN RUSSIAN ARCTIC (p. 50)

Marsel Galiullovich Gubaidullin,

Mikhail Viktorovich Badratdinov

Northern (Arctic) Federal University

17, Severnaya Dvina naberezhnaya, 163002, Arkhangelsk, Russian Federation,

e-mail: m.gubaidulin@narfu.ru, mbadratdinov@mail.ru

The article deals with new technologies of arrangement of oil transportation infrastructure in the coastal shelf zone of the western part of the Russian Arctic.

The investigated region determines the use of technologies to ensure safety and durability in ice conditions.

The proposed new method of the ice terminal construction, developed with the participation of the authors, is based on the seawater layer-by-layer freezing in the vessels erected on the ice surface to the height greater than a two-fold thickness of natural ice freezing. Further strengthening of the ice is performed at the expense of drilling non-through holes in the ice, their filling with fresh water and natural freezing by cold. The method of offshore pipeline construction differs from the existing technologies by using insulating cavities filled in by thermal oxidation mixtures of soil with oil as well as by injection of the mixture into the cavities during screw piles installation.

When implementing the above-considered methods it is possible to ensure operation of icy terminals in stormy conditions, shifts of frozen ice fields, year-round tankers’ mooring, delivery of goods and equipment by the ice roads on the coast as well as to provide durability and safety of pipelines’ operation in the seabed of the Arctic shelf. The proposed technology allows the best use of available resources and materials as well as ensures industrial and environmental safety at all stages of construction and operation of oil transportation infrastructure in the coastal shelf zone of the south-eastern part of the Barents Sea.

Key words: arctic territory; continental shelf; new technology; technique of ice terminal erection; construction of offshore pipeline.

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UDC 665.662.9:621.70.226

SONOCHEMICAL TECHNOLOGY OF SEPARATING OIL SLUDGE AND

CONTAMINATED SOILS IN A PILOT PLANT (p. 55)

Marat Salavatovich Mullakaev,

Vladimir Olegovich Abramov

Kurnakov Institute of General and Inorganic Chemistry

31, Lenin’s prosp., GSP-1, 119991, Moscow, Russian Federation,

e-mail: mullakaev@mail.ru

Georgiy Borisovich Veksler

ANO "Research Institute History, Economics and Law Research"

12, office 210, Vrubel str., 125080, Moscow, Russian Federation,

e-mail: info@helri.com

A pilot plant processing oil sludge and oil-contaminated soils using ultrasonic equipment and made its trial tests of LLC "LUKOIL-Uralnefteproduct" (Samara). The results showed high efficiency of the developed ultrasonic equipment in the process of purification of oil-contaminated soil.

A mobile version of sonochemical separation plant sludge and oil-contaminated soil, which has such advantages as portability, autonomy, low operating costs and high efficiency.

Key words: oil sludge; contaminated soils; ultrasound; sonochemical technology; pilot testing; mobile sonochemical separation unit sludge and oil-contaminated soil.

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

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