ISSN 0207-2351

Scientific-technical journal

OILFIELD ENGINEERING

                                                                                                                 published since 1965

November 2014                                        ¹ 11                 12 issues per year

 

CONTENÒS

 

DEVELOPMENT OF OIL AND GAS-OIL FIELDS

 

Vaganov Yu.V., Kustyshev A.V., Yagafarov A.K. Combined technology of an oil formation stimulation during the latest stage of its development (p. 5-10)

 

Lesnoy A.N., Bochkarev A.V., Sten'kin A.V. Substantiation of tectonic shielding of an oil deposit proceeding from the data of hydrodynamic researches (p. 11-16)

 

Shapchenko M.M., Shapchenko T.A., Dorofeev A.A., Vorobjev V.V., Sopnev T.V., Dubnitsky I.R. Step-by-step re­gulation of gas production with the aim of technological regime optimization of producing wells of senomanian deposits (p. 16-19)

 

Omelyanyuk M.V., Pakhlyan I.A. Efficiency increase of producing wells development and operation due to application of impulse-shock, cavitational impact on the wellbore zone of a productive formation (p. 19-23)

 

METHODS OF PRODUCING EFFECT ON A DEPOSIT AND RAISING OIL RECOVERY

 

Muslimov R.Kh., Gazizov A.A., Gazizov A.Sh. Advanced energy-efficient methods of oil production (p. 24-27)

 

Shagaleev R.K., Gareev A.M., Novoselovà D.V. Ways of optimization of formations hydrofracturong technology at Yuzhno-Priobsky field of "Gazpromneft−Hantos, Ltd" (p. 28-31)

 

ECONOMIC ASPECTS OF OIL- AND GAZ-PRODUCING INDUSTRY PROGRESS

 

Vladimirov I.V., Khisaeva A.I. Comparison of economic efficiency of metods applied for enhancement of formations oil recovery while developing high-viscous oil deposits (p. 32-35)

 

GEOCHEMICAL RESEARCH WORK

 

Babaev F.R., Martynova G.S., Maksakova O.P., Mamedova S.G., Nanadzhanova R.G. Geochemical characteristics of oil from some Azerbaijan deposits (p. 36-42)

 

TECHNIQUE AND TECHNOLOGY OF OIL PRODUCTION

 

Gareev A.A., Sharafutdinov R.F., Yumaguzin Yu.M., Valiullin R.A. Some information about "relaxation self-excited oscillations" of operational mode of low-productive electric submersible pump (p. 42-50)

 

Yusifov S.I., Allakhverdiev E.V. Enhancement of technological efficiency of gas consumption regulation in case of natural pressure gas lift (p. 50-53)

 

GATHERING, TRANSPORTATION AND PREPARATION OF OIL, GAS AND WATER

 

Nurullaev V.Kh., Gakhramanov F.S., Aliev S.T. Rheological and physical-chemical regularity of energy consumption decrease while transporting fuel oil mixed with water (p. 53-57)

 

Information on the articles (p. 58-63)

 

 

Information on the articles

 

UDC 622.276.6

 

COMBINED TECHNOLOGY OF AN OIL FORMATION STIMULATION

DURING THE LATEST STAGE OF ITS DEVELOPMENT (ð. 5)

 

Yury Vladimirovich Vaganov,
Alexander Vasilievich Kustyshev,

Alik Kayumovich Yagafarov

 

Tyumen State Oil and Gas University

38, 50 let Oktyabrya str., 625038, Tyumen, Russian Federation,

e-mail: kustishev@tngg.info

 

Most oil fields of the Western Siberia are currently on the latest stage of their development that can be cha­racterized by oil flow rates declination and water cut increase; herewith, at this stage oil fields are usually deve­loped by means of water-floo­ding. The article considers problems of oil recovery enhancement due to combined forced production and non-stationary water-flooding. In the first case increase of oil flow-rates of produ­cing wells happens due to oil entrainment into the flow from low-permeable areas of a productive formation because of increase of draw-down pressure and pressure drop between layers with different permeability characteristics in the well bore zone. Oil production increase while non-stationary water-flooding occurs due to the pressure drop across the heterogeneous productive formation during the technological half-cycles of injection wells performance. In the addition to the above-said, introduction of nonionic low-concentrated surfactants and alcohols into the tech­nological solution composition is proposed in order to enhance efficiency of oil recovery from low permeable formation zones.

 

Key words: oil deposit; oil field; well; formation; forced production; oil-water factor; water-flooding; wettabi­lity; permeability; oil recovery; latest stage of development; combined tech­nology of formation stimulation.

 

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UDC 553.98(2/.9)+550.834

 

SUBSTANTIATION OF TECTONIC SHIELDING OF AN OIL DEPOSIT PROCEEDING

FROM THE DATA OF HYDRODYNAMIC RESEARCHES (ð. 11)

 

A.N. Lesnoy, A.V. Bochkarev, A.V. Sten'kin

 

"Lukoil–Engineering, Ltd."

2, Suschevsky Val str., 127055, Moscow, Russian Federation,

tel.: (495) 983-22-86, (495) 983-22-94,

fax: (495) 983-21-41,

å-mail: LUKOIL-Engin@lukoil.com

 

Vategansky field served an example for previously stating the fact that the remaining reserves were concentrated in the closed units, which were margined by faults according to the seismic data, to regular changes of rocks physical-chemical properties in normal-fault areas, to existing difference of formation pressure values in a productive formation at different sides of the disjunctive as well as to different hypsometric levels of oil-water contact (OWC). In addition to the above-mentioned methodological techniques of faults’ identification the present article shows some principle possibility of justifying tectonic shielding of an oil deposit proceeding from hydrodynamic data. Hydrodynamic listening, indicator and other researches prove the presence of a geological barrier between the studied wells. It is proposed to revise the system of formation pressure maintenance with account of faults effect.

 

Key words: hydrodynamic listening; indicator studies; KSP; normal-fault area; cracks; formation pressure; faults; horizontal well.

 

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UDC 622.279

 

STEP-BY-STEP REGULATION OF GAS PRODUCTION WITH THE AIM

OF TECHNOLOGICAL REGIME OPTIMIZATION OF PRODUCING WELLS

OF SENOMANIAN DEPOSITS (ð. 16)

 

M.M. Shapchenko, T.A. Shapchenko

 

NPF "Urengoyspecgis, Ltd."

POB 48, Taezhnaya str., 629860, Urengoy, Purovsky region, Yamalo-Nenets autonomous territory, Russian Federation,

tel.: (349) 349-34-97,

å-mail: 08475216@mail.ru

 

A.A. Dorofeev, V.V. Vorobjev, T.V. Sopnev, I.R. Dubnitsky

 

JSC "Severneftegazprom"

 

Some new method of technological regimes optimization is proposed to prevent and minimize water-flooding of gas wells product due to increasing of gas extraction area without stopping wells’ operation. The instrument is "step-by-step" regulation of production with constant monitoring of water content researches. The result of "step-by-step" regulation is as follows:

1) water isolation due to gas pressure increase in recovery zone;

2) selection of wells that: a) have "super-collectors" in their sections (current or future intervals of water-flooding); b) intensively working with additional.

Determination of intervals of "super-collectors" and water-inflowing inter-layers using induced spectral neutron-gamma logging (SNGK-W) to carry out geological-technical activities in water-inflowing intervals is performed.

 

Key words: production site; monitoring; water content logging; rate; flow rate; gas stream; "step-by-step" regulation; opti­mization of technological process; spectral neutron-gamma logging (SNGK-W).

 

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UDC 622.276.75

 

EFFICIENCY INCREASE OF PRODUCING WELLS DEVELOPMENT AND

OPERATION DUE TO APPLICATION OF IMPULSE-SHOCK, CAVITATIONAL IMPACT

ON THE WELLBORE ZONE OF A PRODUCTIVE FORMATION (ð. 19)

 

Maxim Vitalievich Omelyanyuk,

Irina Albertovna Pakhlyan

 

Kuban State Technological University

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

tel./fax: (861) 259-65-92,

e-mail: m.omelyanyuk@mail.ru

 

The decrease of wells productive capacity is associated with a progressive decline of a formation pressure, porosity and permeability deterioration of rocks of a formation wellbore zone (FWZ) and filters damage due to pores blocking being the result of mechanical, chemical and biological colmatage. The mechanism of improving rocks filtration properties resulting in wells flow-rate increase after their construction or overhaul directly depends on the method that was chosen to provide stimulation of FWZ. A method of treating of a formation wellbore zone that envisages combination of hydro-monitor impacts on perforation holes or production string filters with pulse-cavitation escape on the formation structure with the fluid is developed. Some equip­ment for the method’s implementation is developed as well. Efficiency of the developed technology while operating artesian wells is proved. Growth of daily production amounts to 60...100 %, saving the effect for a long time. The proposed method of FWZ stimulation while implementing the technology in optimal head-and-flow and amplitude-frequency modes provides high effectiveness of treatments and doesn’t cause any damage to a well technical conditions, namely, the integrity of wire and mesh filters, cement ring and drill-pipe casing string.

 

Key words: formation fluid; formation wellbore zone (FWZ); rotary hydraulic vibrator; hydrodynamic stimulation; flow-rate increase; producing well; depression; jet pump; cavitation generators.

 

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UDC 622.276.6

 

ADVANCED ENERGY-EFFICIENT METHODS OF OIL PRODUCTION (ð. 24)

 

R.Kh. Muslimov

 

AN RT

20, Bauman str., 420503, Kazan, Republic of Tatarstan, Russian Federation

 

A.A. Gazizov, A.Sh. Gazizov

 

JSC "IDZHAT"

31V, N. Ershov str., 420061, Kazan, Republic of Tatarstan, Russian Federation,

tel.: (843) 272-89-03, 272-89-13, 272-89-53,

fax: (843) 272-89-43,

e-mail: idzhat@ idzhat.ru

 

The largest oil fields of the Russian Federation, being at the latest stages of their development, have the lowest rates in the world by reference to availability of hardly-recoverable oil reserves and current oil recovery factors. Achievement of acceptable oil recovery in these conditions is possible in case of rational use of energy of injected and formation waters and by connection of hidden interfacial energy of an oil formation. As a solution to this problem is offered a of "ULTRAFLO", ultrafine reagent of new generation with unique phase permeability and self-regulating influence on productive formations’ nano-system, releasing the interfacial surface energy to displace unrecoverable oil is proposed to solve the problem.

 

Key words: latest stage of development; oil recovery; "ULTRAFLO" ultrafine reagent of new generation; phase permeability.

 

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UDC 622.276.66

 

WAYS OF OPTIMIZATION OF FORMATIONS HYDROFRACTURONG TECHNOLOGY

AT YUZHNO-PRIOBSKY FIELD OF "GAZPROMNEFT-HANTOS, LTD." (ð. 28)

 

R.K. Shagaleev

 

"Gazpromneft–Hantos, Ltd."

56, Lenin str., 628011, Khanty-Mansijsk, Tyumen region, Khanty-Mansi autonomous territory, Russian Federation,

tel.: (346) 735-48-00,

fax: (346) 735-48-44,

e-mail: ODO@hantos.gazprom-neft.ru

 

A.M. Gareev

 

Bashneft–Dobycha, Ltd."

30, korp.1, Karl Marx str. 450077, Ufa, Republic of Bashkortostan, Russian Federation,

tel.: (347) 261-61-61,

fax: (347) 261-62-62,

e-mail: info_bn@bashneft.ru

 

D.V. Novoselova

 

RKNTC "Neftyanaya dolina"

 

The advantages and disadvantages of formations hydraulic fracturing conducted at the fields of "Gazpromneft–Hantos, Ltd." are discussed in the article. Some variants of solutions to achi­eve wells optimal performance after conducting formations hydraulic fracturing are suggested, summarized optimization criteria of formation hydraulic fracturing at the wells of Yuzhno-Priob­sky field are presented to ensure commercial oil production.

 

Key words: formation hydraulic fracturing; oil recovery factor; reservoir properties; geological-field parameters; hardly-recoverable reserves; clay content; porosity; permeability; well logging.

 

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UDC 622.276.5.03

 

COMPARISON OF ECONOMIC EFFICIENCY

OF METODS APPLIED FOR ENHANCEMENT OF FORMATIONS OIL RECOVERY

WHILE DEVELOPING HIGH-VISCOUS OIL DEPOSITS (ð. 32)

 

I.V. Vladimirov

 

CJSC "Concord"

10, korp. 3, Dmitrovsky proezd, 117422, Moscow,
Russian Federation
,

tel.: (495) 748-41-35

 

A.I. Khisaeva

 

JSC "NPF "Geofizika"

12, Vosmogo Marta str., 450005, Ufa, Republic of Bashkortostan, Russian Federation

 

The article compares technical-economic efficiency of applying two technologies of oil recovery enhancement (EOR) while developing high-viscous deposits, namely, technologies of thermal effects and non-stationary water-flooding. The results of application of the above-mentioned EOR methods while developing high-viscous oil deposits witnessed the fact that under certain conditions each of the methods under consideration is effective. That’s why, besides the technological parameters, it is necessary to involve economic indicators into the analysis to obtain the clear-cut solution on the advantage of one of these methods. The analysis proved the fact that though technological appeal of both options is thought attractive, the thermal effect technology is rather risky from the point of view of the economy as it strongly depends on the operational costs and results in the least decrease of oil self-cost. Non-stationary water-flooding technology isn’t technologically attractive so strong, but it is almost independent of the economic situation and ensures the maximum reduction of oil production self- cost.

 

Key words: cumulative net present value; technology; EOR methods; unsteady flooding; thermal effects.

 

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UDC 553.98.061.17

 

GEOCHEMICAL CHARACTERISTICS OF OIL

FROM SOME AZERBAIJAN DEPOSITS (ð. 36)

 

F.R. Babaev, G.S. Martynova, O.P. Maksakova, S.G. Mamedova, R.G. Nanadzhanova

 

Institute of Geology and Geophysics of the Azerbaijan National Academy of Sciences

Az1143, 119, G. Javid prosp., Baku, Republic of Azerbaijan,

å-mail: fikret_b@mail.ru

 

The paper presents the results of studying of hydrocarbon composition and properties of oil from Gyarby Apsheron, Neft Dashlary, Palchyk Pilpilyasi, Neftchala and Garasu deposits by means of chromatography-mass spectrometry, infrared spectro­metry and combined thermal analysis.

 

Key words: oil; hydrocarbon composition; isoprenoid; phytane; prystane.

 

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UDC 622.276.53.054.23:621.67-83

 

SOME INFORMATION ABOUT "RELAXATION SELF-EXCITED OSCILLATIONS"

OF OPERATIONAL MODE OF LOW-PRODUCTIVE ELECTRIC SUBMERSIBLE PUMP

(ð. 42)

 

A.A. Gareev

 

Oil and Gas Production Department "Nizhnesortymskneft"

628447, Nizhnesortymsk-city, Surgut district, Tyumen region, Khanty-Mansi autonomous territory – Yugra, Russian Federation

 

R.F. Sharafutdinov, Yu.M. Yumaguzin, R.A. Valiullin

 

Bashkir State University

32, Zaki Validi str., 450074, Ufa, Republic of Bashkortostan, Russian Federation

 

At present operation of wells with electric submersible pumps of low productivity provides a lot of problems to specialists engaged in oil industry. One of them is the loss of operatio­nal modes stability in case of a well flow-rate shifting to the "left side" of pressure-flow-rate characteristic of an electric sub­mersible pump. This article examines the problem of spontaneous oscillations dependence on technological operational mode of ESP installation.

 

Key words: low productive electric submersible pumps; spontaneous oscillations of pumps’ technological operational modes; relationship between pump’s operational parameters and oscillations of technological modes of ESP installation.

 

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UDC 622.276.52

 

ENHANCEMENT OF TECHNOLOGICAL EFFICIENCY

OF GAS CONSUMPTION REGULATION IN CASE

OF NATURAL PRESSURE GAS LIFT (ð. 50)

 

Salakhaddin Imamali Yusifov

 

Azerbaijan State Oil Academy

20, Azadlyg prosp., Az1010, Baku, Republic of Azerbaijan,

tel.: (94450) 493-83-40,

e-mail: siyusifov@yahoo.com

 

Elchin Vali Allakhverdiev

 

State Oil Company of Azerbaijan Republic

 

The present article proposes one of the possible ways of enhancing quality of gas flow-rate regulation in case of natural pressure gas lift with account of some complications. The results of the analysis of the system operation, such as collector – gas distribution battery – well, allowed suggesting the well-known practical solution to determine the value of rational pressure drop at the regulating valve. The results of numerical analysis of gas lift characteristics before and after gas flow-rate regulation of a definite well are submitted.

 

Key words: natural pressure gas lift; collector – gas distribution battery – well system; rational pressure drop at regulating valve; gas flow throttling; hydrate formation; P-regulating low; critical, before critical and super critical regimes of flowing.

 

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UDC 622.276

 

RHEOLOGICAL AND PHYSICAL-CHEMICAL REGULARITY

OF ENERGY CONSUMPTION DECREASE WHILE TRANSPORTING FUEL OIL

MIXED WITH WATER (ð. 53)

 

V.Kh. Nurullaev, F.S. Gakhramanov

 

Department of Pipelines of State Oil Company of Azerbaijan Republic

28, Hodzhaly prosp., Az1025, Baku, Republic of Azerbaijan,

e-mail: veliehet1973@mail.ru: Fikret.Qahramanov@socar.az

 

S.T. Aliev

 

NIPI "Neftegaz" SOCAR

88a, G. Zardabi str., Az 1012, Baku, Republic of Azerbaijan,

e-mail: S.T.Aliyev@gmail.com

 

The paper presents the study of physical-chemical and rheo­logical properties of fuel oil, scientific research of methods to influence the properties of mixtures with abnormal physical and chemical properties, the deve­lopment of new technologies, providing efficiency of mixtures’ preparation, and technical means for the techno­logy introduction. For oil emulsions is The most important indicator of fuel oil emulsions is their stability, i.e. the ability of non-destruction during some definite period of time and of non-division into two phases – fuel oil and water. In conditions of oil emulsions formation while fuel oil transportation, at the oil – water interface, water drops can exist for a longer time thus leading to formation of "water in fuel oil" emulsion. From a thermodynamic point of view, water-oil emulsions belong to unstable systems. Experimental studies of mixing water with fuel oil in different proportions are carried out.

 

Key words: heat capacity; flash point temperature in a clo­sed cup; physical-chemical properties; rheology; kinematic viscosity.

 

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