ISSN 0130-3872 Scientific-technical journal OF OIL AND GAS WELLS ON LAND AND SEA published since 1993 March 2015 ¹ 3 12 issues per year
CONTENÒS |
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DRILLING TECHNIQUE AND TECHNOLOGY |
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Ermolaeva L.V. Dependence of leakage of production casing strings on tectonic faults (p. 14-15) |
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Myslyuk M.A., Kisil I.S., Bodnar R.T., Bogoslavets V.V., Bilischuk V.B. Some aspects referring to control of surface phenomena while opening productive layers (p. 20-27) |
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EQUIPMENT AND TOOLS |
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WELL COMPLETION |
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MEMORY DATES |
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For the 65th anniversary of Sergeya Nikolaevicha Bastrikova (p. 46-47) |
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Information on the articles (p. 48-51) |
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Information on the articles |
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LONGITUDINAL STABILITY OF OPERATIONAL WELLS SUPPORT AT THE FIELDS IN CONDITIONS OF PERMAFROST AND LOW-TEMPERATURE SAGGING ROCKS (p. 4)
Kim Alexandrovich Polozkov
ÑJSC «Nordeco Eurasia» 7A, Kronshtadt boul., Moscow, 125212, Russian Federation, e-mail: Polozk@mail.ru
Alexander Vladimirovich Polozkov
«Gazprom VNIIGAZ, Ltd.» 142717, Razvilka settle., Leninsky district, Moscow region, Russian Federation, e-mail: A _Polozkov@vniigaz.gazprom.ru
Some specific features of low-temperature section structure in the areas of distribution of permafrost and low-temperature rocks are presented. Absence of the «relict frozen rocks» at the depth and, accordingly, in the selected south permafrost area (the Western Siberia, the North-East of the European territory) is noticed. Due to climatic conditions of deposit permafrost rocks are found only near the surface, while at the depth the relict permafrost rocks can’t be preserved. In connection with the above-said, with account of thermobaric conditions, not the relict permafrost rocks are found in the identified «low temperature deep intervals» as it was thought before, but gas hydrate rocks which in the considered conditions of their bedding pay influence on the considerable decline of well support longitudinal stability. The article presents some method of calculation of well support longitudinal stability, based on the use of the proposed characteristic dependences. It allows more easy calculation of longitudinal stability and choice of its optimum variants. While performing calculation of a well support longitudinal stability, different variants of a well structure were considered.
Key words: well support; permafrost, gas-hydrated, subsiding, low-temperature rocks; longitudinal stability; critical length of a well support; critical load on the support; characteristic dependences.
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DEPENDENCE OF LEAKAGE OF PRODUCTION CASING STRINGS ON TECTONIC FAULTS (p. 14)
Lyudmila Vladimirovna Ermolaeva
Samara State Technical University 244, Molodogvardeyskaya str., Samara, 443100, Russian Federation, phone/fax: + 7 (846) 242-36-95, e-mail: bngssamgtu@mail.ru
Integrity of production casing strings depends on hydro-geological conditions of oil fields. The factors that cause damage to production casing strings possess their own specific features in different oil- and gas-bearing regions. Some reasons leading to leakage of production casing strings at the oilfields of Samarsky Volga region are found out.
Key words: tectonic faults; formation water; production casing string; corrosion.
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RESTORATION AND IMPROVEMENT OF WELLS PRODUCTIVITY OF NAKHODKINSKOYE FIELD OF «LUKOIL–WESTERN SIBERIA, LTD» DUE TO USE OF ADVANCED AND EFFECTIVE TECHNOLOGIES (p. 16)
Ramiz Alidjavad Gasumov, Ilgam Yusif Shikhaliev, Irina Stanislavovna Shikhalieva
JSC «SevKavNIPIgaz» 419, Lenin str., Stavropol, 355035, Russian Federation, phone: (8652) 35-96-75, 35-94-11, 35-97-08, 56-71-09, e-mail: svnipigz@gazprom.ru
Sergey Leonidovich Kuznetsov, Maxim Gennadievich Zipir
«LUKoil–Western Siberia. Ltd.», «Yamalneftegaz» Production Company 24, Matrosov str., Salekhard, Yamalo-Nenets autonomous territory, Tyumen region, 629008, Russian Federation, phone: (34922) 2-98-04, fax: (34922) 2-96-19, 2-96-21, e-mail: ynd@lukoil.com
The article considers the results of restoration and improvement of Nakhodkinskoye field wells productivity due to application of effective and complex technology developed by JSC «SevKavNIPIgaz».
Key words: process liquids; repair and insulation activities; wells workover; formation well-bottom area; gel-forming compound; deposit; water-flooding; gas-water contact; tubing.
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SOME ASPECTS REFERRING TO CONTROL OF SURFACE PHENOMENA WHILE OPENING PRODUCTIVE LAYERS (p. 20)
Mikhail Andreevich Myslyuk, Igor Stepanovich Kisil, Roman Tarasovich Bodnar, Vladimir Vasilievich Bogoslavets, Viktor Borisovich Bilischuk
Ivano-Frankivsk National Technical University of Oil and Gas 15, Karpatskaya str., Ivano-Frankovsk, 76019, Ukraina, phone: (03422)727162, +38(0342)727168, e-mail: myslyuk@nung.edu.ua, mmyslyuk@ukr.net, mpkyakaf@gmail.com, volodja-bogoslavets@ukr.net
The article considers surface phenomena influence on the quality of productive layers opening. Brief characteristic of the devices used for determining the liquid’s surface and interfacial tension by applying methods of maximum pressure in a gas bubble, rotating drop, drop volume and expanded meniscus as well as the coefficient of porous media wettability is presented. Methodical principles of selecting optimal compositions of surfactants for controlling surface phenomena while opening productive layers are described. Some example of selecting a composition of surfactants for a biopolymer drill mud is discussed.
Key words: wettability coefficient; interfacial tension; methods and devices for control of surface phenomena; optimal composition of surfactants; surface tension.
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SOME POSSIBLE ADVANTAGES OF OPENING GAS-HYDRATE DEPOSITS BY APPLYING THE DRILLING TECHNIQUE BASED ON REVERSE CIRCULATION OF DRILLING MUD AND PRESSURE BALANCE IN A WELL-FORMATION SYSTEM (p. 27) (preliminary discussion)
Boris Mikhailovich Kurochkin, Vasily Fedorovich Sabaev
Kim Alexandrovich Polozkov
ÑJSC «Nordeco Eurasia» 7A, Kronstadt boul., Moscow, 125212, Russian Federation, e-mail: Polozk@mail.ru
Petr Ivanovich Gaftunyak
«Gazprom Ltd.» 16, Nametkina str., Moscow, 117420, Russian Federation
The article discusses possibility of using the technology of opening gas-hydrates deposits and gas production with reverse circulation of working agents under controlled pressure in the formation-well system (working drill-pipe casing string and annulus in the well). Control of unbalanced thermo-baric systems in a well is planned to be carried our by means of submersible pumps installed in the operational drill-pipe casing string and in the annulus. Possible spontaneous gas shows with the aim of their exclusion are planned to be monitored, thanks to what safe operation will be timely ensured by change in the productivity of submersible pumps. It means that, in case of change of temperature and pressure in the well, smooth process of the well’s interaction with the producing formation will be guaranteed.
Key words: opening technology; gas-hydrates deposits; gas production; reverse circulation; working agents.
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SOME ASPECTS REFERRING TO ONE OF HYDRO-TECHNICAL CALCULATION OF JACKUP FLOATING DRILLING RIG (p. 31)
Fazil Gurban Gasanov
NIPI «Neftegaz», State Oil Company of Azerbaijan Republic (SOCAR) 88a, G. Zardaby prosp., Baku, AZ1012, Republic of Azerbaijan, phone: (994 12) 4318019, e-mail: vugar.abdullayev@socar.az
The paper presents hydro-technical calculations of jackup floating drilling rig, designed for drilling and abandonment of oil and gas wells drilling and, in order to determine safety factors for shear, overturning, non-failure of pillar strings when jackup floating drilling rig is staying and to evaluate the freeboard margin when leaving the drilling site. The corresponding calculations were made when a jackup floating drilling rig was located by its bow (stern) towards wind direction and waves run. The calculation considers the worst combination of stability moment and overturning moment depending on load ratio of a jackup floating drilling rig, the magnitude and direction of extreme external effects.
Key words: offshore field; platform; floating offshore drilling rig; safety factor on shear; pillar strings; vertical and horizontal load; freeboard; drilling site.
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UPDATING OF GEOMETRY OF CUTTING STRUCTURES OF ROLLING CUTTER DRILL-BITS USED FOR DRILLING OF MEDIUM-HARD ROCKS (p. 35)
Dmitry Yurievich Serikov
I. Gubkin Russian State University of Oil and Gas 65, Leninsky prosp., Moscow, 119991, Russian Federation, phone/fax: (915) 372-77-79 (Serikov D.Yu.), e-mail: serrico@rambler.ru
The analysis of the work of teeth cutting structures of rolling cutter drill bits in slipping and partial braking modes is carried out. The analysis served the basis for determining the optimal values of slipping of cutting structures led rows, which allow increasing efficiency of medium rocks destruction by drill bit teeth.
Key words: rolling cutter drill bit; cutting structures geometry; slipping; partial braking.
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EXPERIMENTAL RESEARCHES OF NON-STATIONARY PROCESS WHILE OPTIMIZED OPENING OF PRODUCTIVE FORMATIONS AND WELLS' DEVELOPMENT (p. 40)
Samir Masudovich Mammadov
«New-Tech Services, Ltd.» 31G, Shabolovka str., Moscow, 115162, Russian Federation, phone: +7(985) 771-72-52, e-mail: smammadov@nt-serv.com
Yaroslav Vladimirovich Rukavitsyn
CJSC «Geospector» 51-1-1, Vavilov str., Moscow, 117296, Russian Federation, phone: +7(910) 429-79-84, e-mail: yaros3000@yandex.ru
The results of experimental studies of non-stationary wave processes occurring during mechanical deepening of the wellbores and the opening of productive reservoirs are presented. The principles of control of non-stationary wave processes, providing high-quality opening of the productive reservoirs are discussed. Some examples of studying the frequency spectra of non-stationary differential pressure arising in a well bottom area are given.
Key words: bottom-hole pressure; drilling; productive formations opening; frequency spectrum; weight on the bit.
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OF SERGEYA NIKOLAEVICHA BASTRIKOVA (p. 46)
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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY" |