Construction of Oil and Gas Wells on Land and Sea

The problems of oil and gas wells drilling in conditions of permafrost deposits are analyzed. It is shown that one of the effective methods of vertical and inclined wells drilling is the so-called «Casing with Drilling (CwD) technology» – an innovative technology that allows simultaneous drilling and casing of the wellbore. This technology application allows to avoid a lot of problems encountered during drilling and shortens wells construction time-period. The technology was first applied on an industrial scale by Tesco, together with other oil companies, in production conditions of a gas field in the USA, Iowa in 2002. The authors carried out a comparative analysis of the technology application in the Eastern Urengoy license area with the foreign experience and the experience of drilling technology, traditionally used in Russia. A conclusion about the advisability of expanding application of this technology, at least, in the fields of the Western Siberiais made.

Keywords: «Casing with Drilling (CwD) technology»; gas field; vertical and directional drilling; drill bit; drilling fluid; recoverable assembly for casing with drilling.

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UDC 622.24

TECHNOLOGICAL POSSIBILITIES OF SHOCKDAMPERS
TO IMPROVE DRILLING EQUIPMENT SAFETY (p. 9)

Eduard Arkadievich Petrovsky,

Kirill Alexandrovich Bashmur,

Ivan Sergeevich Nashivanov

Siberian Federal University

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

e-mail: bashmur@bk.ru

The article considers the problems related to the vibration of a drill string bottom hole assembly during oil and gas wells construction. The reasons for longitudinal vibrations arising during rotary drilling are analyzed. A passive method of controlling of a drill string vibration is discussed, some modern developments in this field, including protection of the equipment by means of the devices, built into a casing string to balance the dynamic system of the drill string, namely, shock vibration dampers are presented. The relevance of the shock vibration dampers use, that makeit possible to create many reliable and efficient constructions with different characteristics and application purposes are shown. Herewith, the general classification of shock vibration dampers, based on the mechanical principle of operation, is formed and presented. The construction of the shock vibration damper developed by the authors of the article that is characterized both byits simplicity and high potential of reliability and efficiency is given as well.

Keywords: drill string; vibration; drilling; shock vibration damper; passive control.

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UDC 622.22

DEFINITION OF DRILLING EQUIPMENT OPERATIONAL DURABILITY (p. 14)

Fariz Muzaffar Gafarov,

Mahluqa Surxay Rahimova

Azerbaijan State Oil and Industry University

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

e-mail: rahimova_mahluqa@mail.ru

Based on an drilling average curve for Azerbaijan oil fields, functions of load distribution density are constructed and the formula for determination of drilling equipment operational durability under the power law of the load change is derived.

Keywords: drill pipes; drilling equipment; durability; hook; tension.

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UDC 622.276.012.05

A WELL SUCKER-ROD PUMP WITHOUT VOLUME LOSSES OF LIQUID
AND DETERMINATION OF ITS DESIGN PARAMETERS (p. 16)

Zameddin Sultaneli oglu Allakhverdiev

Azerbaijan State Oil and Industry University

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

e-mail: sultanelioglu@gmail.com

The article considers possible creation of a well pump without volume losses of liquid. It should be noted that when creating any well pump elimination of volume losses of liquid, characteristic of plunger pumps is of the primary importance.

Keywords: valve; plunger; plunger-cylinder; pump-compressor pipe.

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UDC 622.279.7

INCREASE OF DRILLING FLUIDS THERMAL STABILITY (p. 18)

Rustam Ramizovich Gasumov,

Irina Leonidovna Osadchaya

JSC «SevKavNIPIgaz»

419, Lenin str., Stavropol, 355035, Russian Federation,

e-mail: GasumovRR@scnipigaz.ru, OsadchayaIL@scnipigaz.ru

Improvement of drilling technical-economic indicators at the oilfields of the North Caucasus greatly depends on the technical level of drilling fluids, their compliance with the geological conditions – that is reservoirs high pressures and temperatures.

Provision of the required quality of drilling and formation opening is possible through the use of emulsion compositions which make it possible to maintain the permeability of a formation bottom-hole zone. However, the use of the reverse (hydrophobic) emulsions requires the necessity of solving specific problems that can arise when using this type of dispersed systems, namely, stability of their properties over time at high temperature and pressure conditions.

The article considers the problems of improvement of inverse emulsions formulations in order to increase their thermal stability for particular downhole conditions. It is recommended to increase the emulsions stability due to the introduction of a co-emulsifier that pays influence on physical-mechanical and chemical properties of the emulsifier and emulsion. The method of a co-emulsifiers selection to obtain hydrophobic emulsions of nearly 170 °C thermal stability, the results of experimental studies, formulations of emulsions and practical recommendations on treatment of wells with high reservoir temperatures are given as well.

Keywords: hydrophobic emulsion; thermal stability; emulsifier; co-emulsifier.

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UDC 622.240.82

DETERMINATION OF THE DRILLING MUD HYDRAULIC CHARACTERISTICS
WHEN FLUIDS PASSING INTO A WELL (p. 21)

Tulparkhan Sharabbudinovich Salavatov,

Yagub Ismail Safarov,

Elshan Tofig Ismailov

Azerbaijan State Oil and Industry University

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

е-mail: petrotech@asoiu.az

A number of works is devoted to determination of hydraulic pressure and hydraulic resistance in the circulation system of wells based on both stationary and nonstationary processes [1, 2]. However, these works do not consider the influence of formation fluids incoming into the well, bringing the change of the drilling fluid hydraulic characteristics in the annular space. That’s why, the authors of the present article propose a method that is applied to determine the hydraulic resistance coefficient on the basis of wellhead information about the pressure and flow-rate change in in time under conditions of formation fluids passing into the annular space of the well.

Keywords: drilling fluid; border property; hydraulic resistance.

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UDC 622.245.423

EVALUATION OF NON-NEWTONIAN FLUID DISPLACING POWER (p. 23)

Mikhail Andreevich Myslyuk

Ivano-Frankivsk National Technical University of Oil and Gas

15, Karpatskaya str., Ivano-Frankivsk, 76019, Republic of the Ukraine,

e-mail: mmyslyuk@ukr.net

Hydraulic specific features of non-Newtonian fluids displacement in a concentric annular space are considered. Differential and integral criteria are used to evaluate the efficiency of liquids displacement ability. Based on the results of the numerical experiments, the rheological properties effect of the Herschel-Bulkley fluid on the displacing power is shown. The rheological model effect on the criteria of the fluid displacement efficiency is estimated by the rotational viscosimetry data.

Keywords: fluid displacement in a concentric annulus; efficiency criteria; rheological properties; rotational viscosimetry; regression equation.

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UDC 622.24

RESEARCH OF TECHNOLOGICAL PROPERTIES AND PARAMETERS
OF LIGHTWEIGHT CORROSION-RESISTANT GROUTING MIXTURE (p. 29)

Alexey Mikhaylovich Voronik,

Sergey Vladislavovich Kamenskikh,

Nadezhda Mikhaylovna Ulyasheva

Ukhta State Technical University

9, Рervomayskaya str., Ukhta, 169300, Republic of Komi, Russian Federation,

e-mail: skamenskih@ugtu.net, zav_bs@ugtu.net

The article presents theoretical and laboratory studies that were carried out to determine the technological properties and parameters of a lightweight corrosion-resistant grouting mixture, developed by the authors of the present article and designed for wells cementing in hydrogen sulfide containing highly permeable rocks. The existing grouting solutions and mixtures formulations used when cementing wells in the conditions of acquisitions and hydrogen sulfide aggression are discussed in detail and analyzed. The dependences of the basic technological properties and parameters of the developed lightweight corrosion-resistant grouting mixture on the concentration and particle size of the granulated foam glass are studied and fixed.

Keywords: highly permeable rocks; hydrogen sulfide; grouting solutions and mixtures; cement stone; concentration; dispersion; granulated foam glass.

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UDC 502.37+502.55:655.6

EXPERIMENTAL BASIN FOR LABORATORY MODELING
OF HYDROCARBONS EMERGENCY SPILLS IN THE ARCTIC CONDITIONS (p. 35)

Alexander Viktorovich Salnikov,

Kristina Olegovna Mironova

Ukhta State Technical University

13, Pervomaiskaya str., Ukhta, 169300, Komi Republic, Russian Federation,

e-mail: ugtusovet@yandex.ru

The study of the hydrodynamic processes of oil and oil products spreading along water surfaces in icy conditions is the basis of the operative formation of oil and oil products spreading scenarios as well as effective implementation of oil spill response plans (OSR).

The article considers the problems of creation of small-volume experimental basins to study the dynamics of oil spill spreading in frozen water areas and watercourses, allowing to carry out simulation of accidental oil spills in icy conditions in the liquid direct flow of in a wide range of speeds and temperatures are considered.

The proposed design of an experimental basin for laboratory modeling of emergency hydrocarbon spills in icy conditions allows improving the quality of model experiments by ensuring a uniform and heterogeneous flowrate along the entire cross-section of the measurement zone over a wide range of the studied speeds and temperatures as well as reducing economic, time and labor expenses when preparing the basin for the reproduction of the studies.

Keywords: emergency oil spills; Arctic seas; icy conditions; experimental basin.

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UDC 553.980:550.3:004.942

TECHNOLOGY OF THE UTILIZATION OF GAS THROWN TO THE ATMOSPHERE
ON THE MARINE FIELDS ON THE LAST PERIOD OF THE DEVELOPMENT (p. 39)

Tulparkhan Sharabuddinovich Salavatov,

Rasim Ali oglu Panakhov,

Elmira Valekh kyzy Gadashova,

Ramil Mukhtar oglu Mamedov

Azerbaijan State Oil and Industry University

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

е-mail: petrotech@asoiu.az, rasim.p@yandex.ru, elmira_qadashova@mail.ru, oilman25@mail.ru

Chingis Saibovich Guseinov

Gubkin Russian State University of Oil and Gas (National Research University, NRU)

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

е-mail: guseinov2@yandex.ru

The essence of the method is the use of the pressure that is created by the hydrostatic level of the sea water and control of the pressure inside the proposed technology using a pump.

At the same time, pumping of the liquid out of the tank provides the conditions for gas inside suction, while the liquid flow from the sea – the gas compression due to the hydrostatic level influence. The control of gas suction and compression is performed by valves opening and closing according to the technological scheme of paired tanks consisting of vertical large-diameter pipes, the lower part of which is fixed in the seabed. Separation of the gas and liquid phases is carried out by a special viscous liquid, which controls the actuating mechanisms of connecting and disconnecting pumps and associated valves.

Keywords: gas collection; compressors; compressed gas; separating liquid.

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IN MEMORY OF ALEXEY TIMOFEEVICH KOSHELEV
(p. 42)

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

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