Equipment and Technologies for Oil and Gas Complex

The experience of use of seismic-facial zoning method to predict productive reservoirs extension is described in the article on the example of the deposits of Achimovsky oil- and gas-bearing complex within the boarders of Zapadno-Yaroyakhinsky area in the conditions of weak drilling of the territory under study. While choosing seismic attributes it was used a complex approach, based both on the statistical data of neural simulation and well-log data, electric facies zoning and a priori regional sedimentary model. The conducted researches resulted in building seismic facies maps by applying the technologies of automatic classification on the basis of neuron network technology of Stratimagic software together with SeisFacies and NexModel additional units. The software helped to depict the sedimentation specifics of Achimovsky oil- and gas-bearing complex and extension of sand reservoirs within the boundaries of the territory under study.

Key words: seismic-facial zoning; Achimovsky oil- and gas-bearing complex; turbiditic flows; deep sea deposits.

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UDC 622.276(476)

TECHNIQUES TO DETERMINE THE PRESSURE VALUES

WHICH CAUSER DEFORMATION PROCESSES OF A FORMATION (p. 10)

Alexey Igorevich Belonozhko,

Kirill Yurievich Medvedev

"Belorusneft" Production Association, "BelNIPIneft"

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

e-mail: A.Belonozhko@beloil.by, K.Medvedev@beloil.by

The article presents the justification and the techniques to determine the pressure values which, when developing hydrocarbon deposits of the Republic of Belarus, cause deformation processes in a formation bringing a significant reduction of the integral permeability. These techniques are the following ones: determination of the critical bottom hole pressure based on the interpretation of well testing, critical reservoir pressure with account of building the curves of specific withdrawals from the deposits and direct laboratory technique. Information about the pressure values allows correct application of the mass balance method to assess the geological reserves of hydrocarbons, to effectively and efficiently plan the implementation and updating of the reservoir pressure maintenance systems as well as to predict the change, depending on the pressure of production wells characteristics.

Key words: indicator diagram; bottom hole and reservoir pressure; deformation processes in a formation; rock compressibility.

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UDC 622.276.53

POSSIBILITY OF REPLACEMENT OF CAST STAGES

OF ELECTRIC SUBMERSIBLE CENTRIFUGAL PUMPS (ESCP)

IN COMPLICATED CONDITIONS (p. 16)

Alexey Valentinovich Degovtsov,

Nikolay Nikolaevich Sokolov,

Alexander Vladimirovich Ivanovskiy

Gubkin Russian State University of Oil and Gas

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

e-mail: degovtsov.aleksey@yandex.ru, sokolovnn2010@rambler.ru, alivan95@yandex.ru

The problem of wear resistance of downhole pumping equipment is very relevant. For example, in LLC "RN-Purneftegaz" ESCP failure due to corrosion, complicated by erosion, is the cause of over 40 % failures. ESCP wear resistance is considerably influenced by its operating units design, including use of the proper materials. The present article was aimed at determining operational indicators dependences of electric submersible centrifugal pumps’ units, manufactured from Ni-resist cast iron by the sand casting technology as well as from stainless steel (stamp-welded construction), on wear out by abrasive particles. The problem of determination of possible use of stamp-welded units in conditions of oil production, complicated by the removal of mechanical impurities, was solved as well.

Analysis of comparative testing results of ESP units, manufactured by different technologies, revealed the following facts:

– relative wear resistance of units manufactured by the "stamping + welding" method from stainless steel is higher than the wear resistance of the units, manufactured by nickel iron casting method;

– acceptable wear out of a units’ parts has little effect on the units’ hydrodynamic characteristics, thus making it problematic to define the state of "parametric ESCP failure" by the criterion of dropping of the basic hydrodynamic indicators of a downhole pumping unit;

– parts wear out of the units manufactured from Ni-resist cast iron leads to significantly greater vibration loads than similar wear out of units manufactured from stainless steel, thus confirming the prospects of stamp-welded units use in case of oil extraction with a high content of mechanical impurities;

– double-seat units of electric centrifugal pumps, manufactured by "stamping + welding" technology of stainless steels have high wear resistance and can be recommended for work in wells, complicated by the removal of abrasive mechanical impurities with concentration up to 1 g per 1 l of formation fluid.

Key words: wear resistance of downhole pumping equipment; unit of an electric submersible centrifugal pump; ESCP units; cast units; stamp-welded units; wear; nickel cast iron; stainless steel; influence of wear.

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UDC 622.24

DAMAGE OF DRILL PIPES WHILE IN SERVICE (p. 20)

Alexander Petrovich Korchagin,

Viktor Vladimirovich Klimov,

Natalia Vladilenovna Barinova,

Alexey Olegovich Murashov

JSC "IrkutskNIIhimmash"

3, Academiс Kurchatov str., 664074, Irkutsk, Russian Federation,

e-mail: klimov@himmash.irk.ru, barinnat@yandex.ru, a.o.murashov@gmail.com

The article deals with incidents of spiral fractures of 63,5×4,5 drill pipes with tool joints welded to pipes by means of friction welding. Pipe damage develops in the place of the tool joint-to-pipe radial weld joint and has fatigue nature. Torque failure and high stress occurrence in a pipe wall precede the spiral fracture of pipes presented for examination, resulting from a "torque shock" caused by bit de-spinning. After successive unexpected bit relieving, the snapping back of the pipe string and its' damage occurs. In the process of a spiral fracture the pipe ruptures spirally. The rate of the fracture process will mainly depend on mechanical properties of the pipe’s and coupling's metal. Flaws of metallurgical origin oriented along the rolling direction as well as the applied coupling-to-pipe joint method (friction welding as a factor defining drill pipes’ possible failure while in service) can promote the nature of the fracture. The article provides the evaluation of the damaged pipes and couplings' actual mechanical properties, presents the results of the coupling metal impact bending test. By strength metal characteristics conforming to regulatory requirements, by metal's low sensitivity to stress concentrations and high fracture toughness, the rate of damage propagation in the mode of fatigue loading can be very low. Determination of drill pipes failure causes appears the most pressing in terms of pipes' early breakdown prevention and industrial safety maintenance in the process of bore-hole drilling.

Key words: drill pipes; spiral fracture; friction welding; deviation of fiber; mechanical properties; strength characteristics; impact toughness; brittle failure; crack propagation energy.

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UDC 621.771.2

UPDATING THE DESIGN OF DRILL PIPES’ TOOL JOINTS

IN ORDER TO INCREASE OPERATIONAL RELIABILITY (p. 24)

Gurban Sadygovich Abdullayev,

Nigyar Ibragimovna Mustafayeva

Sumgait State University

1, Baku str., 43-d kvartal, AZ5008, Sumgait, Republic of Azerbaijan,

e-mail: Abdullayev.qs@bk.ru, h.ibo@mail.ru

Drill pipes are one of the main assortments used in the oil industry. Drill pipes failures are mainly caused by their tool joints. Elimination of the cause requires updating of drill pipes’ production technology, provision of complete mechanization and automation using corresponding industrial robots (IR).

The article considers updating of drill pipes’ tool joints. The authors of the article propose some new design of tool joints’ connection with the last coupling turn, the height of which is reduced approximately by 70 % as compared with the standard connection. Thanks to this constructive decision the lifting characteristics of drill pipes’ tool joints are improved.

Key words: drill pipes; accordion connections; tool joints; thread end finish; fatigue failure; competitiveness; threading parameters; thread profile area.

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UDC 622.276

OPERATIONAL EXPERIENCE

OF 2SPhh/hh DIFFERENTIAL SUCKER-ROD PUMPS (p. 27)

Vladimir Rostislavovich Drachuk

Udmurt State University

1, bld. 7, Universitetskaya str., 426034, Izhevsk, Udmurt Republic, Russian Federation

The article presents the data on the operation of 2SPhh/hh differential sucker-rod pumps at the wells of JSC "Udmurtneft" developed by LLC "Ekogermet -M". The results, obtained during testing of 97 sucker-rod pumps that were operated when producing high-viscous oil for over 12 years are processed. 2SPhh/hh pumps have the best technical and economic parameters (higher rates of filling and submission, MTBF, no jamming of pumps and continuity of the rods, etc.) as compared with other differential pumps, manufactured by the industry, are the best of the commercially available differential pumps technical and economic parameters (higher ratios of admission and volume efficiency, mean time between failures, no pumps jamming and rods continuity, etc.).

Key words: oil production; high-viscous oil; differential sucker-rod pump; mechanical seals; increase of operational time between failures; reliability and efficiency increasing of differrential sucker-rod pumps.

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UDC 622.276.6

EXPERIMENTAL-INDUSTRIAL RESEARCH

OF THIXOTROPIC PARAFFIN OIL DESTRUCTION IN FIELD PIPELINES (p. 32)

Marat Davletovich Valeev,

Albert Kamilevich Zaripov

Ufa State Oil Technical University

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

e-mail: Zaripov.AK@ozna.ru

Alexander Yurievich Davydov,

Lilya Mavlitzyanovna Zaripova

Ufa State Oil Technical University, branch in Octyabrsk-city

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

e-mail: alex-dy@yandex.ru, Lilyabert31@mail.ru

The article deals with the thixotropic properties of paraffin oil. The results of experimental-industrial research aimed at raising the efficiency of influence of paraffin oil thixotropic destruction by means of using a testing apparatus (vibrator) on wells productivity increase. The results of the experimental-industrial testing of the reverse vibrator, in well No 306 carried out by JSC "Tatoilgaz", proved its operational capacity as no failures (breakage of parts) were detected. When using the vibrator from well № 306 to the group measuring unit № 302, pipeline pressure dropped thus contributing to the effective thixotropic destruction of high viscous paraffin oil and to the increase of the flowline cross section.

Key words: thixotropic destruction; vibration technology; liquid fluctuations; valve; crank; vibrator.

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UDC 622.24

PLUG MODE CRITERIA DURING CEMENT SLURRY FLOWING

IN WELLS ANNULUS (p. 36)

Dmitry Sergeevich Shlyakhovoy

LLC "Inko-Service"

8, Dymchenko str., 400005, Volgograd, Russian Federation,

e-mail: dmitry.yugen@yandex.ru

Sergey Borisovich Beketov

North Caucasus Federal University

1, Pushkin str., 355009, Stavropol, Russian Federation,

e-mail: bsb.gt@rambler.ru

Belief that displacement of drill mud by cement slurry in the process of cementing is very effective in case of the plug (structural) flow regime of the latter is widely spread in scientific literature. The article overviews the criteria of plug mode existence that can be met in scientific literature. A new criterion linking the flux core relative area during cement slurry flow in the annular channel with Saint-Venant criterion is also derived. It is based on computer modeling and mathematical analysis. The conclusion about low-probable flow of cement slurry in the plug mode when cementing wells is made.

Key words: drill mud displacement; plug (structural) mode; plug mode criterion.

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UDC 622.276(476)

A TECHNIQUE OF WITHDRAWALS COMPENSATION CALCULATION

IN "DEGASSED" DEPOSITS BY THE EXAMPLE

OF IZVESTINSKOE OILFIELD (p. 41)

Kirill Yurievich Medvedev,

Alexey Igorevich Belonozhko,

Vladimir Alexandrovich Mikhalevich

"Belorusneft" Production Association, "BelNIPIneft"

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

e-mail: K.Medvedev@beloil.by, A.Belonozhko@beloil.by, v.mihalevich@beloil.by

Now a lot of the RF oil fields of near and far abroad are developed by means of artificial modes with the organized system of formation pressure maintenance. The important characteristic when regulating development of such fields is the value of the withdrawals compensation of the extracted oil by the injected water. The incorrect estimation of the compensation value leads to contradictions between settlement indicators and the actual field data and, consequently, to negative aftereffects when extracting oil reserves. The article suggests some technique of estimation of oil withdrawals compensation at the "degassed" deposits when the free gas is produced together with the gas, dissolved in oil.

Key words: reservoir; filtration; permeability; water-flooding; heterogeneity; pressure differential; oil recovery factor.

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UDC 622.276.7

DETERMINATION OF OPERATIONAL CAPACITY

OF OIL WELLS UNDERGROUND EQUIPMENT DEPENDING ON THE INFLUENCE

OF MECHANICAL AND PHYSICAL-CHEMICAL FACTORS (p. 45)

Omar Makhmudovich Kerimov,

Museyib Makhmudovich Kurbanov,

Roshan Eldarovich Sadygov

Azerbaijan State University of Oil and Industry

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

e-mail: museyib.gurbanov@mail.ru, rovshan.sadigov@hotmail.com

The article deals with one of the most urgent problems of oil production – the impact of mechanical and physical-chemical factors on the operational capacity of oil wells underground equipment. The process of corrosion and corrosion-erosion wear out of underground oil field equipment is multifactorial. The problem when applying the classical method of its study, is solved by changing of one of the parameters, leaving the rest of them constant. Such an approach to the solution of the problem is time consuming, since each factor is subjected to its own series of experiments that is not used in future when studying the influence of other factors. So, some new method is suggested for application to solve the problem in case of availability of a relatively small number of input data.

Key words: operational capacity; underground equipment; oil wells; corrosion rate; wear out; mechanical and physical-chemical factors; group argument-dependent method; formation water; tubing; rods.

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UDC 620.192.7+621.643

RATIONALE PARAMETERS AND CRITERIA OF EQUIPMENT DISTRIBUTION

IN GROUPS OF INTENSITY OF ITS METAL, PARTS EMBRITTLEMENT

WHEN DIAGNOSING AND ESTIMATING RESISTANCE

TO A BRITTLE FRACTURE (p. 49)

Alexander Valentinovich Mitrofanov,

Anatoliy Borisovich Menshin

JSC "Safety Control Systems and Technologies. Techdiagnostics"

22, Yunykh Lenintsev str., 460047, Orenburg, Russian Federation,

e-mail: contact@tdiag.ru

The possibility of distribution of the technological equipment parts, operated in a wet hydrogen sulfide-containing environment sulphuretted into five groups with varying intensity (maximum, high, high, moderate, minimal) of metal properties’ reduction to brittle fracture resistance (BFR).

Such distribution is based on the parameters and criteria accepted in normative-technical documentation on the design of the equipment, working under pressure in hydrogen sulfide-containing environments, such as partial pressure of hydrogen sulfide and the values of the design allowable stresses allowed for these groups.

Some methodical approach, algorithm and matrix to distribute a plurality of equipment parts operated in gas-chemical industry into groups in accordance with reduction intensity of metal properties to BFR. This distribution allows to evaluate the metal properties to BFR of all the equipment based on the results of samples testing for the metal fracture resistance by GOST 25.506-85, selected from the group of the equipment parts with a maximum intensity of metals’ properties reduction to BFR. Herewith, the positive results can be used for other equipment with the elements of this group as well as with a reserve of the equipment metal parts of other groups with less intensity of metal properties reduction to BFR.

Key words: technological equipment; hydrogen sulfide-containing environment; equipment parts; long-term operation; distribution of the equipment parts; resistance to brittle fracture; fracture resistance test.

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UDC 622.692.288

PECULIARITIES OF PIPELINE DIAGNOSTICS BY A SET OF REMOTE METHODS

BASED ON LINEAMENT ANALYSIS AND MAGNETIC TOMOGRAPHY (p. 54)

Svetlana Sergeevna Kamaeva,

Alexander Ivanovich Nikonov

Institute of Oil and Gas Problems Russian Academy of Sciences

3, Gubkin str., 119333, Moscow, Russian Federation,

e-mail: nikson59@rambler.ru, transkor.k@gmail.com

Valerian Pavlovich Goroshevskiy,

Vadim Nikolaevich Belotelov

LLC NTC "Transkor-K"

31A, Perovskaya str., 111141, Moscow, Russian Federation,

e-mail: info@transkor.ru

Complex studies of pipelines diagnostics by means of magnetic tomography and lineament analysis have been carried out in Sakhalin island. The results of the methods comparison has proved the fact that in the lineaments intersection areas looked upon as active faults there also identified dangerous anomalies of pipelines stress-strain state by application of magnetic tomography method.

Key words: magnetic tomography method; stress-strain state of pipelines; fault; lineament; analysis.

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UDC 622.621.643

DIAGNOSIS INTRODUCTION PROSPECTS

OF MOTOR-OPERATED TUBING VALVES AT THE OBJECTS

OF JSC "TRANSNEFT" (p. 60)

Sergey Alexandrovich Istomin,

Boris Viktorovich Lonkin

LLC "Central Research and Design Institute "STARK"

7, office 407, Bolshoy Strochenovskiy per., 115054, Moscow, Russian Federation,

e-mail: s.istomin@instark.ru, b.lonkin@instark.ru

Maksim Nikolaevich Kazantsev,

Radik Minneakhmetovich Giniyatov,

Ilya Alexandrovich Flegentov

LLC "Transneft R&D"

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

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

The article presents the main diagnostics introduction prospects of pipeline valves at the objects of PJSC "Transneft". Basic information about the RF pipeline system state is given, the main big accidents that occurred at oil and gas pipelines are described as well as evaluation of financial losses of the companies operating the pipeline system due to the above-mentioned accidents is submitted. The evaluation of the state and industry standards regulating the diagnosing process, determining norms and methods of diagnosing, criteria of valves’ operational capacity are presented as well. The main methods of pipeline valves diagnosing are considered. They are the following: analysis of diagrams of valves’ power and torque actuator during "open-close" process, vibration methods of diagnosing of operational capacity of pipeline valves mobile units, vibro-acoustic and acoustic-emission methods of valves tightness control. Possibility of proceeding from maintenance and repair services according to valves operating time (hours or cycles) to maintenance and repair according to valves actual technical state is discussed. The data on the economic efficiency of introduction of pipeline valves diagnostics at Smolensk and Rostov nuclear power plants are presented.

Key words: diagnostics; pipeline valves; oil pipeline; gas pipeline; accident; motor-operated pipeline valve; maintenance; repair.

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UDC 620.178.7

DEVELOPMENT OF DATA ANALYSIS METHODS OBTAINED DURING MAINTENANCE,

DIAGNOSTICS AND REPAIR OF TECHNOLOGICAL EQUIPMENT

TO INCREASE ITS RELIABILITY AND SAFE OPERATION

AT GAS PRODUCTION OBJECTS (p. 67)

Alexander Valentinovich Mitrofanov,

Sergey Vladimirovich Egorov

JSC "Safety Control Systems and Technologies. Techdiagnostics"

22, Yunykh Lenintsev str., 460047, Orenburg, Russian Federation,

e-mail: egorov@tdiag.ru

The methods applied to collect, process and analyze the data of maintenance, diagnose and repair (MD&R), to guarantee the reliability and safety of the equipment being in operation for a long time are considered. Their drawbacks are shown and the necessity of development of data analysis automated system of MD&R is proved. The approach and the patterns of МD&R data use that can serve as a basis for the automated system development are proposed.

Key words: maintenance data; diagnostics; repair; methods of data collection and processing; data analysis.

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

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