Equipment and Technologies for Oil and Gas Complex

One of the present-day key requirements when projecting development is building of 3D reservoir models to identify basic specific features of geological structure of the object subject to development.

Today, Middle Carboniferous reservoirs are the most promising reserves of oil production growth of Kutushsky oil field, that’s why studying the regularities of the collectors’ distribution is of great importance in terms of the field’s further development.

Lithological heterogeneity of Bashkirian and Vereiskian deposits (Middle Carboniferous period) and reservoirs properties variation associated with resulted in a non-uniform distribution of reserves, both along the area and along the section. Major portion of reserves are distributed over numerous uplifts. Various reservoir heterogeneities should be taken into consideration to efficiently recover these hydrocarbon reserves. Consequently, reservoir heterogeneity analysis is critical to enhance oil recovery.

Based on 3D model analysis, Middle Carboniferous reservoirs are characterized by complex geology and heterogeneity. Bashkirian deposits exhibit lower permeability and porosity compared to Vereiskian deposits. Pay zones in these development objects are separated by impermeable shale barriers and have no communication with each other thus allowing selective-zone production and injection. Shale barriers are quite thick and effectively isolate the adjacent pay zones.

Key words: oil field; geology; heterogeneity; deposit; formation; carbonate reservoir; area; cross-section; digital model; permeability; porosity; net-to-gross ratio; stratification factor; shale barriers.

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UDC 622.276.1/.4:552.54

FILTRATION PROCESSES PECULIARITIES

IN COMPLEX CARBONATE COLLECTORS AND THEIR INFLUENCE

ON THE OIL FIELDS’ DEVELOPMENT TECHNOLOGY

IN THE BELARUS REPUBLIC (p. 12)

Andrei Alexandrovich Tishkov

Production Association "Belorusneft"

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

phone: 8 (029) 166-05-56,

e-mail: a.tishkov1@beloil.by

Oil fields in the Republic of Belarus are related to Pripat oil-bearing zone which is structurally and geologically presented by Pripat downfold. Prypat downfold is geologically complex and includes collectors of different type and lithology. The paper is up-to-date due to the fact that the main part of the recoverable resources in Belarus accounts for complex-structured carbonate collector. This collector is a complex one and its porosity and permeability have not been properly studied yet, especially those which fall on rock-collectors mainly formed after the deposits formation period. This collector type differs from collectors with mainly inter-granular porosity (terrigenous) by structure variety (pores, cavities, fractures) and in the whole by irregularity of porosity and permeability both along the area and the section. That is why it is necessary to improve modern oil recovery technologies from complex carbonate collectors using quality laboratory equipment.

The basis of this scientific paper is core study in BelNIPIneft research oil institute. The studies were made in static and dynamic conditions using Autoflood 700 modern equipment to simulate filtration processes in dynamics.

Key words: core material; the collector; fluid properties; permeability; pressure; filtration; displacement factor.

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UDC 622.276.1/.4

SOME METHOD OF COEFFICIENTS DETERMINATION OF APPARENT POROSITY

TO ESTIMATE THE DEGREE OF THE RESERVOIRS RESIDUAL GAS SATURATION

(p. 16)

Alexey Nikolaevich Karpenko,

Evgeniy Valerievich Solodkiy

Taras Shevchenko Kyev National University

90, Vasilkovskaya str., 03022, Kiev, the Ukraine,

e-mail: alexbrig@inbox.ru, Eugeniy_Solodkiy@ukr.net

Peter Petrovich Povzhik

Production Association "Belorusneft"

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

phone: 810375232793258,

e-mail: povzhik@beloil.by

The article considers the problems of non-account of residual gas saturation influence of the near bottom-hole area of a formation on the showings of acoustic, neutron and density log methods. The interpretation and re-interpretation of the holes’ logging data of Ostroverkhovsky gas-condensate field (the Ukraine, northern bead of Dneprovsko-Donetsk cavity) is carried out in order to determine the formations in which the influence of the residual gas saturation on porosity methods showings is quite essential. Based on the conducted studies, the authors offer some method of apparent porosity coefficients to value the degree of formations’ residual gas saturation.

Classic methods applied for definition of the reservoir porosity coefficient by the results of geophysical well logging are grounded on the assumption that the residual gas saturation of the near hole area of a formation has no influence on the methods’ showings. The studies, held by the authors, resulted in proving the fact that in a number of cases the residual gas saturation garbles the porosity methods showings (acoustic, neutron and density logging) that leads to mismatch of values of design and real porosity. Presence of gas in near bottom-hole area makes different effect on the showings of the methods of acoustic, neutron and density logging. Determination of presence of gas saturation effect in that or other reservoir is the prior objective while interpreting GIS data for correct accounting of gas saturation character of a formation. To solve the problem the authors of the present article suggest some method of appraising gas saturation degree on the basis of calculation of porosity apparent curves.

Key words: porosity; reservoir; gas saturation; logging.

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UDC 62-531.4

SOME SPECIFIC FEATURES OF "AMP-VEGA" BEARING ASSEMBLY

OF MAGNETIC SUSPENSION OF CENTRIFUGAL COMPRESSOR ROTOR

(p. 19)

Alexander Vladimirovich Nedviga,

Anatoly Evgenievich Naumets,

Dmitry Valentinovich Mosolov

LLC "Vega-GAZ"

2, bld.1, Kirpichnye Vyemky str., 117405, Moscow, Russian Federation,

phone/fax: 8(495) 995-44-74, 995-44-80,

e-mail: nedviga@vega-gaz.ru, naumets@vega-gaz.ru, dmosolov@vega-gaz.ru

Fedor Georgievich Kochevin,

Pavel Vasilievich Kiselev

LLC "Pskov Engineering Company"

18, Shkolnaya str., 180006, Pskov, Pskov region, Russian Federation,

phone/faх: 8(8112) 72-30-72, 72-30-71, 72-43-54,

e-mail: fejfor@mail.ru, kispavel@rambler.ru

This article describes an active magnetic bearing with five axes of control of "AMP VEGA" assembly developed by LLC "Vega-GAZ" and intended for the magnetic suspension of centrifugal compressor rotor (CC) of natural gas pumping unit (GPU). The description of the bearing assembly, which design was developed on the basis of the concept envisaging combination of elements of radial and axial reference node to reduce axial dimensions of the rotor and rational use of technological space of functional areas, is presented. Technological and operational advantages of the new design compared to the existing one are given.

Key words: magnetic suspension; magnetic suspension system (SMP); active magnetic bearing (ILA); bearing assembly; reference node.

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UDC 622.24

TECHNICAL MEANS FOR EFFICIENCY IMPROVEMENT

OF DRILL CUTTINGS HYDROTRANSPORT WHILE DRILLING

INCLINED AND HORIZONTAL WELLBORES (p. 23)

Vladimir Ivanovich Balaba,

Olga Dmitrievna Zinchenko

I. Gubkin Russian State University of Oil and Gas

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

e-mail: teksertgubkin@yandex.ru

The article discusses some technical devices used in the composition of a drill casing string to retard the drill cuttings settling or to return them back from a well wall or from stagnant zones into the upward flow of flushing water (special drill pipes, circulating subs, oscillator-turbulizer, rotating turbulizer) as well as a purification technology of inclined and horizontal parts of a wellbore from drill cuttings by means of reverse circulation of flushing water.

Key words: inclined and horizontal wells; drill cuttings; special drill pipes; circulating subs; oscillator-turbulizer.

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UDC 622.24.051.55:752.2

ANALYSIS OF STRUCTURAL SPECIFIC FEATURES OF WASHING SYSTEMS

OF ROLLING-CUTTER DRILL BITS AND THEIR EFFECT ON THE QUALITY

OF A WELL BOTTOM CLEANING (p. 27)

Dmitry Yurievich Serikov,

Alexander Anatolievich Vasiliev

I. Gubkin Russian State University of Oil and Gas

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

e-mail: serrico@rambler.ru

The results of the work aimed at studying the effect of flushing channel allocation scheme in a rolling-cutter drill bit on the quality of a well bottom cleaning are presented. The analysis of the researches, previously conducted by numerous authors, relating to determination of the effect of various process parameters on the rate of penetration (ROP) is given. The main design schemes of washing used in rolling-cutter drill bits are discussed. The directions of movement of flushing fluid flows in the near the well bottom area, the nature of the distribution of velocity head pressure and cross-flow pressure along the surface of the well bottom for rolling-cutter drill bits with different washing schemes are found out. The analysis of wear-out of rolling-cutter drill bits with different flushing schemes that were proved in the real conditions of drilling is carried out.

The work performed resulted in proving the fact that the currently existing schemes of washing of rolling-cutter drill bits have a number of essential faults but at the same time possess significant reserves for their further improvement.

Key words: rolling-cutter drill bit; jet nozzle; well bottom cleaning.

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UDC 622.323

RESEARCH OF THE INFLUENCE OF PRESSURE CHANGE IN THE CYLINDER

ON SEALNESS OF THE ASSEMBLY OF WELL-HEAD ROD SEALS

WHILE OPERATING OIL-WELL SUCKER-ROD PUMPS (p. 33)

Tamila Uzeyir Khankishiyeva

Azerbaijan State Oil Academy

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

e-mail: tamilla.khankshiyeva72@mail.ru

The article describes the pressure changes in the cylinder of oil-well sucker-rod pumps. Some analytical expression of pressure change during pumping of degassed liquid and gas-liquid mixture is got. With this purpose pump efficiency factor was introduced. While determining actual plunger stroke, under specified operating conditions, the stroke length of well-head polished rods, elastic deformation of the tubing and the rod strings are taken into account. The load, transferred to the polished rods, which depends on the plunger square area and the pressure drop over the plunger and the pump intake is determined. From the statement of the degassed liquid incompressibility, the volume of fluid, received by the pump cylinder in accordance with the differential dependence, defines the cylinder volume by sinusoidal law of the plunger movement. It is found out that during the degassed liquid re-pumping the pressure in the pump cylinder varies sinusoidally. The problems of filling the pump cylinder by the gas-liquid mixture are solved in analogy. Though in this case gas factor, which characterizes the volumetric gas content of the mixture coming to pump intake is taken into account.

An equation of pressure change of gas-liquid mixture in the pump cylinder is got. It is found out that if the value of the gas factor coefficient is near zero then this equation transforms into the equation characterizing the degassed liquid.

Key words: qas-liquid mixture; pump cylinder; tubing.

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UDC 62-82:532.5.011.12

EFFECT OF VISCOUS LIQUID FLOW RATE

WHEN OPERATING FLUID DRIVES OF VARIOUS MODIFICATIONS

(p. 36)

Anna Sergeevna Kaverzina,

Alexander Vasilievich Mineev

Siberian Federal University

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

phone: 8(983)156-97-12, 8(391)206-28-95,

e-mail: kas_05@mail.ru, mineev_bngs.krsk@mail.ru

The present paper defines and outlines the key factors that affect flow rate of viscous fluid when using fluid drives of various designs.

The main basic compounds are obtained for the following values: the rate of bubble growth on the development of cavitation in the pump, the effect of air dissolved in the liquid on pump capacity, the ratio of liquid surface to its volume, pressure, temperature and surface tension.

Cavitation characteristic obtained experimentally in the operational mode of the pump corresponds to the existing computational data.

Key words: cavitation characteristic; pump; suction; air release.

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UDC 621.646.28

STUDYING OF PRESSING MODES EFFECT ON ACCURACY AND SHRINKAGE

OF THREADED PLASTIC DETAILS (p. 38)

Shakhnaz Agakishi Agaeva

Azerbaijani State Oil Academy

34, Azadlyg prosp., АZ1010, Baku, Republic of Azerbaijan,

phone/fax: 8(1099412) 498-29-41,

e-mail: bakiadna78@mail.ru

The article considers the quality of plastic details threads of the oil-field equipment depending on their mode of production. Thus, the effect of the mode of threads parameters production on quality indicators (shrinkage, accuracy, etc.) is discussed. In article also describes application of mathematical methods when studying the influence of separate mode parameters (specific pressure, pressing, holding time in a form and temperature of pressing) on the quality of the produced details. All this resulted in proving the fact that between indicators of quality and regime processes there are accurate mathematical dependences which may be used for various materials and various sizes of metric threads (М10´15¸ М220´6).

The analysis of plastic threads production of details of the oilfield equipment parts is carried out. The regularity of shrinkage change of plastic threads elements on conditions of their production modes is found out. All this led to development of some mathematical models describing the dependence of accuracy of plastic threads elements on the technological modes of their production.

Key words: oilfield equipment; production process; pressing; shrinkage; threaded plastic elements; specific pressure.

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UDC 534.222

HEAVY-LOADED APPLICATION AND ACCELERATED SOLIDIFICATION

OF PROTECTIVE COATINGS IN ACOUSTIC FIELDS (p. 43)

Sergey Alexeevich Bakharev

E-mail: taf@list.ru

Problems of protective coatings application (anticorrosion, paintwork materials, etc.) on the surfaces from steel, concrete, composite and other materials in the air, the area of alternating wetting and directly under water are analyzed. It is proved that the process of solidification and multi-layer coatings application on the production platforms housings in the sea conditions requires significant financial and time expenses and is practically impossible in the air (splashes, high humidity and low ambient temperature), in the area of alternating wetting and under water.

Possibility of accelerated solidification of protective coatings and their heavy-loaded application on rough (class St3), wetted and chilled steel surfaces in the acoustic field is discussed. The results of pilot testing conducted by "Vietsovpetro" company (Vietnam), confirming 40…50 % increase of coatings adhesion while 30...40 % reduction of their solidification duration and 20...30 % decrease of coatings consumption.

Key words: offshore platforms; vessels (tankers); corrosion; adhesion; protective coatings; airbrush; acoustics; nonlinear underwater acoustics.

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UDC 622.276.031:53

PROGNOSIS OF PRODUCTIVITY

OF INTERSALT AND SUBSALT CARBONATE BASINS OF OIL FIELDS

OF THE prypYat depression FOR APPLICATION OF EFFECTIVE TECHNOLOGY

OF DRILLING AND COMPLETION OF WELLS (p. 47)

Petr Petrovich Povzhik,

Sergey Nikolaevich Kadol

Production Association "Belorusneft"

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

phone: 810375232793258,

e-mail: povzhik@beloil.by, s.kadol@beloil.by

Some method of efficiency factor estimation at a well design stage is proposed in the article. The most qualitative hydrodynamic researches of operating wells resulted in sampling of the basic geological and physical-technical parameters of reservoir systems such as oil saturated thickness, porosity, effective rock pressure, permeability factor, dynamic viscosity of a fluid, well productivity. The linear equations of multi-regression are received by means of multidimensional correlative-regression analysis. The mathematical models obtained are used for prediction of the coefficient of projected wells productivity of inter-salt and subsalt deposits of the Pripyat depression. For projected wells reservoir parameters are defined by maps of isobars, capacities, porosity and permeability. Parameters making the greatest effect on productivity and an the value of an average relative error are defined for each model. The prognosis of productivity factor of projected wells allows taking the decision on expediency of drilling and choosing beforehand the most effective technology of development and the method of wells research. The assessment of the success of carrying out geological-technical activities at an early stage allows increasing economic efficiency of the project.

Key words: multidimensional correlative-regression analysis; prognosis of productivity coefficient; projected wells.

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UDC 621.22

RESEARCH OF cavitation reserve VALUE of A Gear-TYPE pump

when pumping gas-liquid mixtures (p. 51)

Irada Yusif Gadjiyeva

Azerbaijan State Oil Academy

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

phone: 8(1099455)7878704, 994124346829,

e-mail: irada-niqar@mail.ru

Cavitation reserve coefficient depends on such factors as atmospheric pressure, pressure at the pump inlet, pressure loss at the site between pump inlet and working chamber, fluid temperature.

When gas-liquid mixtures are used for a gear-type pump the picture of the absorption process becomes more complicated due to the presence of mechanical impurities in the form of non-dissolved gas bubbles and gas release from the liquid flow because of pressure reduction.

When conducting experiments to determine the cavitation reserve coefficient of a gear-type pump the atmospheric pressure was within the limits of 750…760 mm Hg and it was assumed equal to 755 mm Hg.

The magnitude of pressure loss ∆р_n was determined during the cavitation testing of a gear-type pump using non-carbonated liquids (without air supply) and it was proved the same in all the experiments.

Key words: cavitation reserve сoefficient; gas-liquid mixture; gear-type pump; pressure losses; cavitation tests.

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UDC 622.276

PHYSICAL METHODS OF ENHANCED OIL RECOVERY (review)

(p. 53)

Vladimir Olegovich Prokoptsev

Siberian State University of Telecommnications and Informatics

73, Lenin str., 680013, Khabarovsk, Russian Federation,

e-mail: azp_prokoptsev@mail.ru

The paper provides an overview of physical methods of enhanced oil recovery: hydro gas-dynamic fracturing, horizontal wells, wave and combined methods.

The above overview of the physical EOR shows that each method has its own application scope, advantages and disadvantages, and it is confirmed by the results of pilot tests conducted at different fields of the Russian Federation.

Analysis of the literature suggests that physical methods of enhanced oil recovery are promising in terms of efficiency, energy and resources saving, but the choice of the method for the successful treatment of wells bottom area requires evidence-based approach.

Key words: oil; enhanced oil recovery methods; production rate; the success of treatment; duration of effect; unit costs; fracturing; horizontal wells; wave methods; combined methods; pilot tests.

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UDC 622.692.234.28

The UNIT for Vapor RECOVERY

FROM AUTOMOBILE Тanks when TRANSPORTing OIL PRODUCTS

(the RF patent of utility model) (p. 60)

Yury Alexeevich Matveev,

Vladimir Alexeevich Kuznetsov,

Alexander Yuryevich Matveev

Federal State Budget Educational Establishment of Higher Professional Education "Ulyanovsk State University"

42, Leo Tolstoy str., 432017, Ulyanovsk, Russian Federation,

phone: 8 (8422) 37-24-62,

e-mail: bgd020762@mail.ru

Stanislav Stefanovich Chebotarev

JSC "Central Research Institute of Economics, Informatics and Control Systems"

2/7, Malaya Bronnaya str., 123104, Moscow, Russian Federation,

e-mail: stsst57@ya.ru

The useful model refers to a set of devices used for vapor recovery of oil products from automobile tanks. The model includes an automobile tank, a pipeline with locking valves and a pipeline system for vapor recovery with a double-wall tank. The double-wall tank is fixed on the vehicle chassis, its inter-wall space is filled by carbon dioxide.

Key words: automobile tank; oil products; pipeline; the unit for vapor recovery; double-wall tank; valve; gate valve; overflow prevention device.

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THE 100th ANNIVERSARY SINCE THE BIRTHDAY

OF Z.L. KONTOROVICH (p. 65)

A.V. Chernikin, Yu.V. Krylov

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

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