ISSN 0207-2351

Scientific-technical journal

OILFIELD ENGINEERING

                                                                                                                 published since 1965

May 2015                                                    ¹ 5                  12 issues per year

 

CONTENÒS

 

DEVELOPMENT OF OIL AND GAS-OIL FIELDS

 

Kalesheva G.E., Olkhovskaya V.A. The present state of oil content and prospects for production of high-viscous oil in the Republic of Kazakhstan (p. 5-10)

 

Bochkarev V.A., Manapova K.T. Conception of ongoing formation of Karachaganak oil and gas-condensate deposit (p. 10-20)

 

Rzayev Ab.G., Rasulov S.R., Ragimova S.N., Orudjev V.V., Mustafayeva G.R. Development of assessment method of oil deposit state (p. 21-23)

 

METHODS OF PRODUCING EFFECT ON A DEPOSIT AND RAISING OIL RECOVERY

 

Litvin V.T., Ryazanov A.A., Farmanzade A.R. Theoretical aspects and experience of the stimulation of oil inflow to the reservoirs of bazhenov formation (p. 24-29)

 

Gladkov E.A., Gladkova E.E., Karpova E.G. Application of "PLUG&PERF" technology in the Western Siberia while developing low-permeable reservoirs (p. 30-33)

 

Zagidullina A.R., Butorin E.A., Kravtsov Ya.I., Gataullin R.N. Excitation of the longitudinal resonance pressure fluctuations in bottomhole conditions (p. 33-37)

 

Tsyganov D.G., Bashkirtseva N.Yu., Sladovskaya O.Yu. Formation of stable oil-water emulsions in case of chemical reagents use to enhance oil recovery of oil formations of Kamenny and Em-Egansky oil deposits in the Khanty-Mansi autonomous territory (p. 38-43)

 

Bayda A.A., Agaev S.G. The effect of inorganic salts on the micellar systems properties for oil recovery (p. 44-46)

 

Idogova Ya.V., Vaschenko A.V., Prochukhan K.Yu., Prochukhan Yu.A. Efficiency of granular reservoir-rocks treatments by "Duglerav IPU-34" innovative two-component reagent in formations simulating conditions (p. 47-49)

 

RESEARCH OF FORMATIONS AND WELLS

 

Bochkarev A.V., Kalugin A.A., Lesnoy A.N., Alexeeva A.D., Polukeev D.I. Fault-block structure of jurassic deposits of Vategansky field by geological survey data and field data (p. 49-54)

 

Zunde D.A., Popov I.P. Some methodology applied for construction of sequence-stratigraphic model of pokur suite deposits (p. 54-59)

 

MATHEMATICAL MODELLING

 

Nikitin B.A., Zakharov I.V., Zakharov O.V. High-performance computing for live modeling systems (p. 59-65)

 

Information on the articles (p. 66-72)

 

 

Information on the articles

 

UDC 622.276.1/.4(574)

 

THE PRESENT STATE OF OIL CONTENT AND PROSPECTS FOR PRODUCTION

OF HIGH-VISCOUS OIL IN THE REPUBLIC OF KAZAKHSTAN (ð. 5)

 

Gulmira Ermukhambetovna Kalesheva,

Valeria Alexandrovna Olkhovskaya

 

Samara State Technical University

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

tel.: (846) 279-03-64,

e-mail: kalesheva-gulmira_29_69@mail.ru, valeriaolh@maill.ru

 

The state of the raw material base of the Republic of Kazakhstan is described and discussed problems of heavy high-vis­cous oil extraction are touched. The possibility of implementing the technology of "cold" extraction of heavy oil with sand withdrawal at Karajanbas field is analyzed. It is shown that under certain geological-physical and economic conditions this technology is effective for intensification and regulation of the development process.

 

Key words: hydrocarbon reserves; hard-extracted reserves; high-viscous oil; thermal methods; technology of "cold" extraction.

 

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UDC 553.98(574.1)

 

CONCEPTION OF ONGOING FORMATION

OF KARACHAGANAK OIL AND GAS-CONDENSATE DEPOSIT

(ð. 10)

 

V.A. Bochkarev, K.T. Manapova

 

"LUKOIL Overseas Service B.V."

Dubai Properties Group Headquarters building, TECOM, P.O. Box 500551, Dubai, United Arab Emirates,

e-mail: Vitaliy.Bochkarev@lukoil-overseas.com, Karina.Manapova@lukoil-overseas.com

 

The concept of continuous replenishment of the unique Karachaganak field is a two-stage scheme of formation of complex hydrocarbon generation-accumulative system in reef heterogeneous structure. Indicators of the current natural mechanism of continuous supply of fluids in isolated reservoir and presence in the natural system mechanism to maintain reservoir pressure in the reservoir are: fact fullness deposits under the structural lock; hydrochemical inversion; regular changes in the composition and properties of reservoir fluids; nonequilibrium systems and the presence of gradual (unstable, intermediate) phase state in the transition zone of the GOC. The results of the reservoir pressure behavior analysis under field development verify the presence of active and ongoing processes of hydrocarbon generation and migration within the PreCaspian basin. For achieving visible effect of natural fluid maintenancó of Karachaganak pay is recommended, along with measures to maintain the reservoir pressure to control wells production rate.

 

Key words: oil and gas condensate field; reef; katagenesis; zone of HC-generation; stage of formation; HC resources renewability; formation pressure.

 

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UDC 622.276.031

 

DEVELOPMENT OF ASSESSMENT METHOD

OF OIL DEPOSIT STATE (ð. 21)

 

Ab.G. Rzayev

 

Institute of Control Systems, NASA

9, B. Vakhabzade str., AZ1141, Baku, Republic of Azerbaijan,

tel.: (+99450) 395-40-08,

e-mail: abbas_r@mail.ru

 

S.R. Rasulov, S.N. Ragimova, V.V. Orudjev, G.R. Mustafayeva

 

State Oil Academy of Azerbaijan

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

tel.: (+99450) 212-08-35,

e-mail: rasulovsakit@gmail.ru

 

Analysis of the nowadays state of oil extraction problem and prognosis of current and accumulated oil selection has been carried out. It is shown that one of the main reasons of coefficient low value of oil extraction out of layers is molecular-surface phenomena existing on the boundary line of oil-rock–forming minerals–residue water. Presence of a layer’s hydrophobic areas justifies their direct contact with oil and, consequently, adsorption of surface-active components of oil (asphaltenes, metal-porphyrin complexes, etc.) on the surface of capillary channels of the layer-collector. Comparing radii of these channels and thickness of boundary layers as well as taking into account the fact of hydrophobic sites prevalence, causing capillary pressure directed against water hydrodynamic pressure, it is supposed that significant part of residue oil in the layer is in boundary-connected state. Structural scheme reflecting interconnection of units of oil production and preparation, measuring, registration of marketable oil and preparation of the layer water has been developed. Assessment method of parameters of Kolmogorov – Erofeev fundamental equation has been worked out.

 

Key words: oil deposit; layer; oil extraction; molecular-surface processes; mathematical model.

 

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UDC 622.276.6

 

THEORETICAL ASPECTS AND EXPERIENCE

OF THE STIMULATION OF OIL INFLOW TO THE RESERVOIRS

OF BAZHENOV FORMATION (ð. 24)

 

Vladimir Tarasovich Litvin,

Anar Rabil ogly Farmanzade

 

National Mineral Resources University (University of Mines)

2, 21st liniya, Vasilevskiy ostrov, 199106, St.-Petersburg, Russian Federation,

å-mail: LitvinVT@bk.ru

 

Arsentiy Alexeevich Ryazanov

 

OAO "RITEK"

3, Bolshaya Ordynka str., 115035, Moscow, Russian Federation,

å-mail: ARyazanov@ritek.ru

 

Acidizing of a formation bottomhole area is one of the most effective and widely used methods of influence on reservoir properties aimed at increasing or restoration of producing wells’ productivity and injection wells’ water-intake capacity. Acidizing of Bazhenov formation is complicated by a number of factors while the accumulated experience of carrying out such activities is very small. This article discusses some of the theoretical aspects and practice of Bazhenov formation acidizing in Sredne-Nazymskoe field. Studies of interfacial tension of various concentrations of some non-electrolytes aqueous solutions, bordering oil, have been carried out. The experiment results made it possible to recommend the use of isopropyl alcohol with 25…30 % optimal concentration.

 

Key words: Bazhenov formation; stimulation of oil production; acidizing; oil recovery enhancement; hard-to-extract reserves (HTR); shale oil; interfacial tension.

 

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UDC 622.276.66

 

APPLICATION OF "PLUG&PERF" TECHNOLOGY IN THE WESTERN SIBERIA

WHILE DEVELOPING LOW-PERMEABLE RESERVOIRS (ð. 30)

 

Evgeny Alexeevich Gladkov,

Ekaterina Evgenievna Gladkova

 

Tomsk State Architectural and Civil Engineering University

2, Solyanaya str., 634003, Tomsk, Russian Federation,

e-mail: gladkov1974@mail.ru

 

Evgenia Gennadievna Karpova

 

National Research Tomsk Polytechnic University

30, Lenin prosp., 634050, Tomsk, Russian Federation

 

The article describes the main problems to be solved during the multistage fracturing operation (frac.). One of these techno­logies can be "Plug & Perf" technology. The essence of the tech­nology lies in the fact that perforating-explosive operations (perf.) in a well are conducted in parallel with hydraulic fracturing. This technology was well-proven while development of low-permeable rocks in the USA (Bakken formation et al.). Many experts compare Bazhenovsky deposits of the Western Siberia with the low-permeable reservoirs in the United States. Carrying out perforating-explosive operations before fracturing during development of low-permeable reservoirs in the Western Siberia can also bring effect. The article discusses the benefits of "Plug&Perf" technology over other technologies. A brief description of the economic feasibility of the technologies application is presented.

 

Key words: low permeable reservoirs; hard-to-extract oil; deposits development; multi-stage hydraulic fracturing; "Plug& Perf" technology; geological and technological models; 3D mo­deling; hydrocarbon deposits.

 

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UDC 534.075.8:622.276.6

 

EXCITATION OF THE LONGITUDINAL RESONANCE PRESSURE FLUCTUATIONS

IN BOTTOMHOLE CONDITIONS (ð. 33)

 

Aliya Rinatovna Zagidullina,

Eduard Afanasevich Butorin,

Yakov Isaakovich Kravtsov,

Rustem Nailevich Gataullin

 

Kazan Science Centre, Russian Academy of Sciences (KazSC RAS)

POB 190, 2/31, Lobachevsky str., 420111, Kazan, Russian Federation,

tel.: (843) 292-75-05,

å-mail: zagidullina_aliy@mail.ru, butorin06@mail.ru, kravtsov-34@mail.ru, rustem.acadrome@mail.ru

 

It is known that in some cases efficiency increase of wave effect on bottom-hole area and oil layer while incompressible fluid injection is reached by excitation of resonance oscillations of a fluid column in a well casing string. Thus, the most important are the problems, related to the possibility of initiation of the fluid column resonance oscillations by pressure forced fluctuation under viscosity forces action in a boundary layer on the interior wall of a casing string, decreasing vibration amplitude during resonance. Some method of the loss coefficient calculation to define pressure fluctuations amplitude during resonance in the low frequency area is considered on the basis of quasi-stationary and pulsation values of a number of parameters in fluctuating currents.

 

Key words: emitter; oscillation (fluctuation); fluid; well; frequency; amplitude; the loss coefficient; resonance.

 

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UDC 622.276.8

 

FORMATION OF STABLE OIL-WATER EMULSIONS

IN CASE OF CHEMICAL REAGENTS USE TO ENHANCE OIL RECOVERY

OF OIL FORMATIONS OF KAMENNY AND EM-EGANSKY OIL DEPOSITS

IN THE KHANTY-MANSI AUTONOMOUS TERRITORY (ð. 38)

 

Dmitry Gennadievich Tsyganov,

Natalia Yurievna Bashkirtseva,

Olga Yurievna Sladovskaya

 

FGBOU VPO "Kazan National Research Technological University"

68, K. Marx str., 420015, Kazan, Republic of Tatarstan, Russian Federation,

tel./fax: (843) 238-56-94,

e-mail: tsyganov.dg@mail.ru

 

Here is discussed some specific features of formation of stable oil-water emulsion resulting from application of different methods aimed at oil recovery enhancement and production sti­mulation. The results of microscopic analysis of oil-water emulsions from Kamenny and Em-Egansky oil deposits are summarized. It is proved that chemical reagents used for oil recovery enhancement and production stimulation promote stability of oil-water emulsions from the oil deposits under consideration. As a result the processes of oil preparation become more complicated. Some specific characteristics of intermediate emulsion layer formation during oil treatment at "Kamennoe" Preliminary Water Removal Unit are discussed as well. It is revealed that the intermediate layer formation occurs due to the increased stability of oil-water emulsion, proceeding to the treatment unit, being the result of using chemical reagents for oil recovery enhancement and oil production stimulation. The results of microscopic analysis of the emulsion intermediate layer are reported. The emulsion is proved to have been stabilized by associated complexes of gel-like particles, high molecular weight surfactants and mechanical admixtures.

 

Key words: oil-water emulsion; emulsion stability; surfactants (surface-active agents, SA); demulsifying agent; oil preparation.

 

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UDC 622.276

 

THE EFFECT OF INORGANIC SALTS

ON THE MICELLAR SYSTEMS PROPERTIES

FOR OIL RECOVERY (ð. 44)

 

Alexander Alexandrovich Bayda,

Slavik Gamid ogli Agaev

 

Tyumen State Oil and Gas University

38, Volodarsky str., 625000, Tyumen, Russian Federation,

tel./fax: (345) 225-69-25,

å-mail.: bayda@tsogu.ru

 

The article presents some experimental data on the effect of inorganic salts on the properties of micellar systems (MS). Sodium and potassium salts are proposed to improve the physical-chemical and oil-displacing properties of MS. Use of sodium chloride and potassium is preferable micro-emulsions, carbonate and sodium bicarbonate – in the MS of water micellar solutions type. Micellar systems modified by carbonate and sodium bicarbonate, are recommended for oil fields development using ASP-flooding technology.

 

Key words: micellar system; micellar solution; micro-emulsion; surface-active agent; oil recovery; inorganic salts.

 

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UDC 622.276.6

 

EFFICIENCY OF GRANULAR RESERVOIR-ROCKS TREATMENTS

BY "DUGLERAV IPU-34" INNOVATIVE TWO-COMPONENT REAGENT

IN FORMATIONS SIMULATING CONDITIONS (ð. 47)

 

Yana Viktorovna Idogova

Ufa State Petroleum Technical University

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

e-mail: yana312@mail.ru

 

Anastasia Vladimirovna Vaschenko,

Konstantin Yurievich Prochukhan,
Yury Anatolievich Prochukhan

 

Bashkir State University

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

e-mail: nastasia_vashenko1991@mail.ru, prochukhanky@list.ru

 

The coefficient of oil extraction from oil-bearing strata by modern, industrially-utilized methods in all oil-producing countries is nowadays considered unsatisfactory, despite the fact that the consumption of oil products worldwide is growing from year to year. Therefore, the problems of application of new technologies of oil production become currently important, allowing significant increase of oil recovery out of formations, being developed already, where application of traditional methods to extract the essential residual oil reserves is no longer possible. The present article studied the effectiveness of granular rock-reservoirs treatments by innovative two-component reagent under reservoir simulating conditions. It is shown that treatment by the aqueous solution provides significant 3…5 % extra-washing of residual oil. It should be noted here that higher values were obtained on collectors of hydrophobic types.

Key words: displacement coefficient; oil recovery; water-flooding; surface-active substance (surfactant); permeability.

 

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UDC 553.98(2/.9)+550.834

 

FAULT-BLOCK STRUCTURE OF JURASSIC DEPOSITS OF VATEGANSKY FIELD

BY GEOLOGICAL SURVEY DATA AND FIELD DATA (ð. 49)

 

Anatoly Vladimirovich Bochkarev,
Alexander Alexandrovich Kalugin,

Alexander Nikolaevich Lesnoy,
Anna Dmitrievna Alexeeva,

Dmitry Ivanovich Polukeev

 

LLC "LUKOIL−Engineering"

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

tel.: 8 (495) 983-22-86, 8 (495) 983-22-94,

fax: 8 (495) 983-21-41,

å-mail: LUKOIL-Engin@lukoil.com

 

Earlier Vategansky field served an example for proving the fact that the remaining reserves are accumulated in the blocks. The blocks, according to the results of 3D seismic survey, field data, results of the analysis of reservoir and bottom hole pressure, analysis of tracer indicators injection, analysis of light absorption factor (LAF), cameral and traditional interference testing, are li­mited by faults. The article discusses the principal possibility of substantiation of tectonic screening of an oil deposit by the results of comparison of the data obtained during 3D seismic survey and in the course of analysis of geological-production data, which confirm and prove the existence of disjunctive faults.

 

Key words: indicator of research; faults; tracer; tracing liquid; injection well; production well; detailed correlation; tracer indicators; LAF (light absorption factor); seismic survey; disjunctive faults.

 

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UDC 551.7.024

 

SOME METHODOLOGY APPLIED

FOR CONSTRUCTION OF SEQUENCE-STRATIGRAPHIC MODEL

OF POKUR SUITE DEPOSITS (ð. 54)

 

Dmitry Alexeevich Zunde,

Ivan Pavlovich Popov

 

Tyumen State Oil and Gas University

38, Volodarsky str., 625000, Tyumen city, Russian Federation,

e-mail: da_zunde@mail.ru, savina@tsogu.ru

 

Pokur suite is the most difficult part for correlation of the Western Siberian Cretaceous deposits because the suite’s layers are characterized by complex facies structure and high geological heterogeneity both laterally and along the section. The proposed methodology of the suite stratification is based on the sequence-stratigraphy method, which assumes the use of stratigraphic unconformities to correlate sequence boundaries. Identification of these boundaries allows creating stratigraphic framework of the suite, predicting the size and shape of geological bodies, building the correct 3D grid as well as presenting more precise distribution of reservoirs and their properties when buil­ding a geological model.

 

Key words: pokur suite; sequence stratigraphy; correlation; continental deposits.

 

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UDC 622.276.1/.4.001.57

 

HIGH-PERFORMANCE COMPUTING

FOR LIVE MODELING SYSTEMS (ð. 59)

 

Boris Alexandrovich Nikitin,

Igor Vladimirovich Zakharov,

Oleg Vladimirovich Zakharov

 

Gubkin Russian State University of Oil and Gas

65, Leninskiy ðrosp., 119991, Moscow, Russian Federation,

å-mail: oversea@gubkin.ru, z_iv26@mail.ru, oleg_zv@list.ru

 

The article examines the first Russian project of interactive geo-hydrodynamic and geo-mechanic modeling systems (so called "cross-modeling") based on the use of "Unofactor" high-performance computing technologies. Taking into consideration the fact that information on the development of recent geo-me­chanical modeling in open sources is very scarce, the article, for the first time, systematizes and gives some analysis of the fragmented information about the used software packages at the level of interactive geo-mechanical modeling while drilling. The article is specially focused on the possibility of interactive (on-line) cross-modeling integration with different adjacent processes of development and operation of oil and gas offshore deposits requiring constant processing of big data amounts, subsea production systems in particular. Efficiency of work with big data amounts requires use of highly productive program complexes. The potential of use of "Unofactor", the first Russian open software platform, and computer modeling equipment, while de­veloping oil and gas fields, is considered on the example of building of live geological-hydro-dynamical and geo-mechani­cal model of Kovykta gas-condensate field.

 

Key words: offshore fields; flow simulation; geo-mechani­cal modeling; cross-modeling; high-performance computing (HPC); live simulation model of a field; "Unofactor"; subsea pro­duction system (SPS).

 

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