Construction of Oil and Gas Wells on Land and Sea

The relevance of research is caused by the necessity of a more accurate selection of promising drill bits at the stage of drilling technology design according to statistical data on the strength characteristics of rocks in the bottom-hole conditions. At present, the selection of bits by drilling intervals is based on the data on standard strength characteristics of rocks, which differ significantly from the rocks’ similar characteristics in bottom-hole conditions. The resistance of rocks to destruction in bottom-hole conditions is a function of not only the strength values under standard conditions, but also the values of hydrodynamic pressure of the drilling fluid at the bottom of the well and pore pressure. The authors of the paper have proposed some calculation dependencies for determining rocks’ strength characteristics, adjusted to bottom-hole conditions. It is shown that these dependences can be combined into three groups within statistical significance: for clay rocks, sandstones and aleurolites, and for crystalline rocks. The applicability of the proposed method is tested on the example of the PDC bit choice for the Western Siberia.

Keywords: rock; strength characteristics of rocks; standard and bottom-hole conditions; scope of a drill bit use; specified bit selection.

Order this article in the electronic library

UDC 622.24 DOI: 10.33285/0130-3872-2020-01(325)-10-12

BIT-SHOE FOR DRILLING ON A CASING STRING (p. 10)

Liliya Bulatovna Khuzina, Dr. of tech. sci., Professor, Head of the Department,

Elvira Azatovna Gimaztdinova, post-graduate student

Almetyevsk State Petroleum Institute

2, Lenin str., Almetyevsk, 423462, Republic of Tatarstan, Russian Federation,

e-mail: lhyzina@yandex.ru, egimaztdinova@mail.ru

Alfira Khamitovna Gabzalilova, associate professor

Ufa State Petroleum Technical University, a branch in Oktyabrsky

54a, Devonkaya str., Oktyabrsky, 452607, Republic of Bashkortostan, Russian Federation,

e-mail: alfiragabzalilova@mail.ru

One of the important tasks of oilfield service companies is to reduce the cost of oil wells construction and their further operation. In this regard, the technology of drilling on casing pipes is considered. The world experience of drilling by a casing string with a bit with opening blades is presented. The experience of the technology application in PJSC "Tatneft" is analyzed. The expediency of this technology application and prospects of its development is proved. The paper proposes a new design of rock-breaking tools for drilling on a casing string.

Keywords: casing string drilling; bit with opening blades; drill bit; drill bit-shoe.

Order this article in the electronic library

UDC 622.276 DOI: 10.33285/0130-3872-2020-01(325)-13-18

REVIEW OF THE MAIN PRINCIPLES OF THE DRILLING TECHNOLOGY
WITH BOTTOM HOLE PRESSURE CONTROL (p. 13)

Vladimir Yurievich Bliznyukov, Dr. of tech. sci., Professor, academician of RANS, academician of UNGA

e-mail: v_bliznukov@rosneft.ru

Natig Ramiz Hadzhiev, Cand. of tech. sci., Advisor on drilling wells

Umid Babek Operating Company

121, SOCAR Tower, 8^th floor, Umid Babek Operating Company Office, Aliev prosp., Baku, AZ1029, Republic of Azebaijan,

e-mail: n.haciyev@socar-umid.com

The paper overviews the drilling technology with controlled bottom-hole pressure, which in its turn includes, depending on the wells’ conditions and the initial task, several subgroups and methods. Wells drilling at big depths and in complex environments using well-known technology is difficult at best, and the occurrence of difficult unmanageable problems arise makes it dangerous. To do this, the basic principles of the technology are given, which lately has become increasingly applicable.

The problems and their solutions are described using well pressure control technology. The existing systems are presented that, depending on the expected problems, at various stages of drilling eliminate downhole anomalies to prevent further risks of the expected complications transition into a more complex phase. The systems that have been successfully applied in the fields of the Gulf of Mexico, on the Norwegian continental shelf in the north-eastern part of the the North Sea during the development and drilling of a number of offshore deposits are given as an example. The necessity of applying this given technology is the presence of the intervals with a narrow range of pore pressure gradient and hydraulic fracture pressure before entering the productive zone.

As a rule, a sharp change in the gradient of pore pressure and hydraulic fracturing pressure is observed in a certain area where the density of the drilling fluid and, accordingly, the ECD value (equivalent of the drilling fluid density during circulation) cannot be controlled by the traditional method. As a result, in practice there appears a necessity of these intervals casing by additional casing strings or “liners”. The basic principle of managed pressure drilling (MPD) (well pressure control) is manipulation of the annular pressure profile in accordance with its needs, and this control is carried out through a hydrostatic column of liquid in addition to the used surface pressure, known as back pressure. Back pressure is usually created by a throttle, which can vary from manual to semi-automatic or automatic control, thereby maintaining the desired pressure profile during the operation. MPD focuses not only on bottom hole pressure, but also on the entire pressure profile.

Keywords: managed pressure drilling (MPD); managed pressure drilling techniques; bottom hole pressure (BHP) control; back pressure; non-productive time (NPT) during drilling.

Order this article in the electronic library

UDC 622.24.051.558 DOI: 10.33285/0130-3872-2020-01(325)-19-24

ROLLER-CONE DRILL BITS WITH INCREASED SPECIFIC PRESSURE
ON THE ROCK (p. 19)

Rodion Mikhailovich Bogomolov, Dr. of tech. sci., Professor

Samara State Technical University

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

Dmitry Yurievich Serikov, Dr. of tech. sci., associate professor

National University of Oil and Gas "Gubkin University"

65, Leninsky prosp., Moscow, 199991, Russian Federation,

e-mail: serrico@rambler.ru

Nikolay Ivanovich Serdyuk, Dr. of tech. sci., Professor, Vice-President of the Russian Geological Society (ROSGEO)

Russian Geological Society (ROSGEO)

10, Vtoraya Roshchinskaya str., Moscow, 115191, Russian Federation

The paper presents the results of research on the development of constructions of cone drill bits with high specific pressure on the rock. Recommendations on the new drill bits development with milled and hard-alloy drill bit cutting structures are given.

The analysis of the influence of the form, size, dynamics of the rock loading when it encounters teeth of various configurations on the rock destruction intensity is presented. The influence of other factors such as specific loads under the cutting edges (its role in ensuring a high mechanical drilling speed and common operational indicators of a drill bit), its working conditions, initial materials for its manufacture, their hardening processing, the nature of the interaction of drill bit teeth with the bottom-hole rock is also described.

Keywords: cone drill bit; rock-destroying elements; shape of these elements; their resistance to breakage and abrasion; mechanical drilling speed; penetration per a drill bit; teeth rims of rolling cutter drill bits; downhole raсk bar.

Order this article in the electronic library

UDC 622.24.051.68 DOI: 10.33285/0130-3872-2020-01(325)-25-30

PDC DRILL BITS WITH INTERCHANGEABLE NEW-DESIGNED
FLUSHING UNITS (p. 25)

Rodion Mikhailovich Bogomolov, Dr. of tech. sci., Professor

Samara State Technical University

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

Alexey Mikhailovich Grinev, Chief engineer

JSC "Volgaburmash"

1, Groznenskaya str., Samara, 443004, Russian Federation

The paper presents the results of research on the development of drill bits construction for deep drilling with quick-changeable flushing units in field conditions, the resistance of which, measured in hundreds of hours, exceeds the resistance of the rest design parameters and eliminates the possibility of nozzle assemblies erosion during drilling.

Keywords: rolling cutter drill bit; diamond drill bit; bottom-hole zone flushing; flushing unit design; hard-alloy wear-resistant nozzle; elastic sealing rings.

Order this article in the electronic library

UDC 622.244.442 DOI: 10.33285/0130-3872-2020-01(325)-31-39

RESEARCH OF RHEOLOGICAL AND STRUCTURAL-MECHANICAL PROPERTIES
OF A BIOPOLYMER SYSTEM UNDER HIGH TEMPERATURE CONDITIONS (p. 31)

Mikhail Andreevich Myslyuk, Dr. of tech. sci., Professor

Ivano-Frankivsk National Technical University of Oil and Gas

15, Karpatskaya str., Ivano-Frankovsk, 76019, Ukraine,

e-mail: mmyslyuk@ukr.net

Nazar Romanovich Zholob, post-graduate student

LLC "Geosynthesis Engineering"

10, Druzhba str., Poltava, 36009, Ukraine,

e-mail: n.zholob@gse.ua

Rheological and structural-mechanical properties of the biopolymer system with the additives (weight %) of xanthan gum (0,2–0,4), extruded starch (1,5–2,5), carbonate filler (25), organic-mineral bridging agent Alevron® (0,5), sodium formnate (50) and potassium formnate (10–230) under temperatures of 25 and 130–170 °C were studied. It is shown that the rheological models most adequate for various combinations of variable factors are those of Hersche – Bulkley, Casson – Shulman, Ostwald and some bi-viscous fluid models. Herschel – Bulkley model is the most appropriate one for experiments planning.

The regression equations used for forecasting of rheological and structural-mechanical properties of the biopolymer system, depending on composition and temperature, are built. The results of the analysis of rheological and structural-mechanical properties are presented.

Keywords: biopolymer system; bi-viscous fluid; rheological properties; rotational viscosimetry; structural-mechanical properties; regression equation.

Order this article in the electronic library

UDC 622.24 DOI: 10.33285/0130-3872-2020-01(325)-40-45

DEVELOPMENT AND RESEARCH
OF LIGHTWEIGHT CORROSION-RESISTANT CEMENT SLURRY
FOR FASTENING HIGHLY PERMEABLE ROCKS
CONTAINING AGGRESSIVE FLUIDS (p. 40)

Aleksey Mikhailovich Voronik, senior lecturer,

Sergey Vladislavovich Kamenskikh, Cand. of tech. sci., associate professor,

Nadezhda Mikhailovna Ulyasheva, Cand. of tech. sci., professor, Head of the Department

Ukhta State Technical University

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

e-mail: avoronik@ugtu.net, skamenskih@ugtu.net, nulyasheva@ugtu.net

The cementing of wells, located in highly permeable rocks containing aggressive fluids, causes a number of difficulties associated with accelerated destruction of cement stone, absorption of grouting mortars, etc. The article, based on the results of the conducted laboratory studies, presents a developed lightweight corrosion-resistant grouting mixture. Using the coefficient of corrosion resistance, it was revealed that the cement stone of the developed cement mixture is corrosion-resistive to aggressive fluids. The physical-mechanical properties and parameters of the grouting mixture and cement stone, the laws of their change from the concentration and dispersion of granular foam glass, were fixed and determined. Based on the studies conducted, the functional relationships between the physical-mechanical properties of the cement stone are revealed. They allow, within the limits of the obtained parameter changes, to determine and predict the current characteristics of a cement stone in the annular space according to the logging data, which provides evaluation of the cementing quality and making timely decisions on the ongoing repair of the well.

Keywords: highly permeable rocks; aggressive fluids; grouting mixtures; cement stone; dispersion; granulated foam glass.

Order this article in the electronic library

UDC 622.323 DOI: 10.33285/0130-3872-2020-01(325)-46-50

ANALYSIS OF CHANGES IN THE PROPERTIES
OF OIL AND GAS COLLECTORS AT DIFFERENT STAGES
OF OIL DEPOSIT DEVELOPMENT (p. 46)

Daniil Alexandrovich Karmanskiy, post-graduate student,

Dmitriy Gennadievich Petrakov, Cand. of tech. sci., associate professor, Dean of the Oil and Gas Faculty

Saint-Petersburg Mining University

2, 21^st Line, St. Petersburg, 199106, Russian Federation,

e-mail: rectorat@spmi.ru, karmanskiy.da@yandex.ru, petrakovdg@mail.ru

At different stages of oil and gas fields development, the reservoir experiences various stress-strain states. The reservoir pressure changes during development brings changes of the reservoir physical-mechanical properties. In view of geochemistry, the properties of the host rocks are also influenced by the fluids themselves. The process of reservoir fluid extraction can cause not only blockage of filtration channels by sand, paraffin and salt precipitation, but also a decrease of the strength and elastic characteristics of the rock. The paper presents the results of studies of the physical-mechanical and reservoir properties of terrigenous reservoirs at various saturation levels. Based on the data obtained, the calculation of changes in permeability and deformability for different stages of oil field development is given.

Keywords: porosity; permeability; effective pressure; physical-mechanical properties.

Order this article in the electronic library

UDC 622.242.4 DOI: 10.33285/0130-3872-2020-01(325)-51-54

PROBLEMS OF STUDYING MARINE ENVIRONMENTAL FACTORS
AND CREATION OF OIL- AND GAS-FIELD ENGINEERING STRUCTURES
FOR THE DEVELOPMENT OF THE ARCTIC CONTINENTAL SHELF (p. 51)

Vadim Evgenievich Petrenko, Cand. of tech. sci., Head of the Managerial Department of PJSC "Gazprom"

PJSC "Gazprom"

156, Moskovsky prosp., St. Petersburg, 196105, Russian Federation,

e-mail: V.Petrenko@adm.gazprom.ru

Dilizhan Allahverdy Mirzoev, Dr. of tech. sci., Professor,

Elena Viktorovna Bogatyreva, Cand. of tech. sci., associate professor

National University of Oil and Gas "Gubkin University"

65, Leninsky prosp., Moscow, 199991, Russian Federation,

e-mail: d_mirzoev@vniigaz.gazprom.ru, shelf1998@mail.ru

The development of reliable and cost-effective types of structures of offshore oil and gas engineering facilities for the northern and Far Eastern seas is possible only with account of the climatic conditions, geographical and economic factors of these areas. They impose special requirements to the designs and construction methods of such facilities and are the subject of a scientific-technical direction of the development of innovative technologies and technical means meant for the development of hydrocarbon resources on the continental shelf of the Arctic.

Keywords: factors; environment; oil and gas field facilities; shelf; Arctic.

Order this article in the electronic library

UDC 33.142.4+341+622.276.04 DOI: 10.33285/0130-3872-2020-01(325)-55-62

RUSSIAN APPLICATION FOR THE ARCTIC SHELF EXTENSION
IN MODERN CONDITIONS OF THE DEVELOPMENT OF THE WORLD
OFFSHORE HYDROCARBON PRODUCTION (p. 55)

Inga Olegovna Sochneva, Cand. of tech. sci., associate professor of International Energy Policy and Diplomacy Institute

Moscow State Institute of International Relations by the Ministry of Foreign Affairs of the Russian Federation – MGIMO MID Russia

76, Vernadsky prosp., Moscow, 119454, Russian Federation,

e-mail: sochnevamgimo@yandex.ru

Russia, Canada, Norway, the United States and Denmark lay claim to different parts of the Arctic Ocean, but so far only Russia, Denmark and Canada have applied for the extension of the continental shelf. The Russian application involves the expansion of the territory of the Russian continental shelf in the Arctic by 1,2 million km. At the same time, Russia didn't include in the application a part of the Arctic continental shelf with an area of more than 330 thousand km², which had previously been part of the USSR polar possessions (the so-called Area A). Herewith, Lomonosov Ridge, some area of the Northern Pole and a part of the Area A are included in the application of Denmark and Canada.

The ongoing climate changes in the Arctic region in the near future will expand economic activity, including the rare-earth minerals extraction and the oil and natural gas production, as well as shift the main fishing areas to higher latitude areas.

On the other hand, the growing activity of the countries that do not have access to the Arctic Ocean, in particular China, and the level of modern engineering and technology development in the field of marine exploration and production suggest future changing of the value of the Arctic territories and water areas in the short term.

Obviously, the expansion of the continental shelf borders by the Arctic states and the situation with the area A affiliation can change the geopolitical situation in the entire region.

Keywords: continental shelf; the Arctic region; climate change; subsea production complexes.

Order this article in the electronic library

SIMONYANTS SERGEY LIPARITOVITCH – 70 YEAR ANNIVERSARY
(p. 63)

Order this article in the electronic library

NATIONAL UNIVERSITY OF OIL AND GAS "GUBKIN UNIVERSITY"

Main page of journal