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ISSN 0130-3872 Scientific-technical journal OF OIL AND GAS WELLS ON LAND AND SEA published since 1993 May 2017 ą 5 12 issues per year
CONTENŇS |
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DRILLING TECHNIQUE AND TECHNOLOGY |
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EQUIPMENT AND TOOLS |
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Blinkov O.G. Use of plasma technology to strengthen elements of rolling-cutter drill bits (p. 28-30) |
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Allakhverdiev Z.S. Development of a special downhole sucker-rod plunger pump (p. 30-33) |
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WELL COMPLETION |
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WELL OPERATION |
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Information on the articles (p. 55-60) |
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Information on the articles |
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POSSIBILITIES OF GEOLOGICAL EXPLORATION DRILLING IN THE ARCTIC SEAS UNDER ANTI-RUSSIAN SANCTIONS (p. 4)
Inga Olegovna Sochneva
Moscow State Institute of International Relations by Ministry of Foreign Affairs of the Russian Federation – MSTIR MFA Russia 76, Vernadsky prosp., 119454, Moscow, Russian Federation, phone/fax: (495) 434-92-27, e-mail: sochnevamgimo@yandex.ru
The article analyzed the experience and the current situation of exploration drilling on the Arctic continental shelf. The drilling strategy, along with the Arctic region natural and climatic conditions, is essentially determined by the technical accessibility of the license areas, which depend on the reached level of equipment and technology. From 2014, the United States, the EU and several other countries introduced anti-russian sanctions. The sectoral sanctions, relating to the prohibition of the access to the technologies used in the projects on the Arctic shelf, have become their important element. The purpose of the study was to evaluate the degree of influence of the sectoral anti-russian sanctions on exploration drilling in the Arctic seas. The exploration drilling, as the object of study, was not chosen by chance, since this is the very stage of the majority of the Russian Arctic projects development.
Keywords: the Arctic region; sectoral sanctions; geological exploration drilling; shelf technical access of the shelf; ice conditions.
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EXPERIENCE OF A SUCCESSFUL COMPLEX APPROACH TO A CORE SAMPLING IN GEOLOGICAL-EXPLORATION WELLS ON THE SEA OF OKHOTSK SHELF (p. 15)
Vladislav Nikolaevich Khoshtariya, Nikolay Vladimirovich Vovk, Anton Alexandrovich Martyn, Ivan Ivanovich Natashkin, Sergey Evgenievich Dmitriev
LLC «Gazprom geologorazvedka» phone: + 7 (495) 428-55-00, e-mail: v.khoshtariya@ggr.gazprom.ru, n.vovk@ggr.gazprom.ru, a.martyn@ggr.gazprom.ru, i.natashkin@ggr.gazprom.ru, s.dmitriev@ggr.gazprom.ru
Samir Masudovich Mammadov
LLC «New Tech Services» phone: + 7 (495) 363-68-74, e-mail: smammadov@nt-serv.com
The article deals with the core selection experience when constructing offshore exploration wells on the Sea of Okhotsk shelf.
Keywords: the Sea of Okhotsk; exploratory drilling on the continental shelf; construction of an offshore well; core selection; complex approach; geological exploration.
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A TWO-INPUT SYSTEMS OF DRILLING PARAMETERS CONTROL (p. 20)
Boris Alexeevich Perminov, Zafar Khanhuseyn Yagubov, Alexey Ilyich Mezentsev, Natalya Anatolievna Pavlika
Ukhta State Technical University 13, Pervomaiskaya str., Ukhta, 169300, Komi Republic, Russian Federation, phone: 8-912-947-41-19, e-mail: boris.perminoff2013@yandex.ru, zav_eatp@ugtu.net, lartsef@gmail.com, pavlika93@mail.ru
Viktor Borisovich Perminov
LLC «Gazprom transgaz Ukhta» e-mail: vperminov@sgp.gazprom.ru
To follow the given strategy of drilling it is necessary to timely monitor violations of the technological process and to eliminate various failures of the operating parameters. To do this it is required to use control-measuring devices that would allow the dynamic increment identification of drilling operating parameters in the technological cycle with a high resolution. The use of two-input control systems, built on variation structures in accordance with the Yagubov – Perminov method, allows to successfully solve the set problem: two-input control systems allow not only to track the dynamic increment of drilling operational parameters, but also to realize the functional dependencies between them. Two-input control systems are characterized by low error of measurement which during indirect measurement (e. g., torque gradient) can be reduced to zero, by high resolution, high sensitivity, possibility of changing of dynamic and frequency properties using the setting parameters. Cutting of the signals constant components at the input of measurement channels allows to fully eliminate the statistical error. A shortcoming of the two-input control systems is a dynamic error presence. However, using these or those methods, the dynamic measurement error can be significantly reduced. To do this, the method of alignment of measurement channels dynamic properties, using the adjustment parameters m, T1, T2, can be widely applied.
Keywords: two-input systems; variation structure; dynamic increments; speed changes; torque gradient; dynamic error.
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DYNAMIC ERRORS OF THE TWO-INPUT SYSTEMS OF DRILLING PARAMETERS CONTROL (p. 24)
Nikolay Denisovich Tskhadaya, Boris Alexeevich Pĺrminov, Zafar Khanhuseyn Yagubov, Emin Zafar Yagubov, Natalya Anatolievna Pavlika
Ukhta State Technical University 13, Pervomaiskaya str., 169300, Ukhta, Komi Republic, Russian Federation, phone: 8-912-947-41-19, e-mail: rektor@ugtu.net, boris.perminoff2013@yandex.ru, zav_eatp@ugtu.net, eyagubov@ugtu.net, pavlika93@mail.ru
Viktor Borisovich Perminov
LLC «Gazprom transgaz Ukhta» e-mail: vperminov@sgp.gazprom.ru
Measurement errors of two-input control systems in a static (steady-state) mode of the object, subjected to measurement, are extremely small and can be practically compensated by matching the adjustment parameters of the measurement channels. However, the operating parameters of the drilling technological process, are, as a rule, of dynamic measurements unpredictable character, and this fact brings significant measurement errors associated with the dynamics. The causes of dynamic errors occurrence directly in the measurement channels of two-input control systems are inertial processes that appear due to the presence of aperiodic links of the variation structures. Herewith, it should be borne in mind that the variation structures reaction is ambiguous, and pays no effect on input signal form. Rationing dynamic errors for such options of measurement schemes construction is practically lacking, that’s why there is nearly no information on their evaluation in the technical literature. The article analyzes the measurement channel response of the two-input control system to dynamic effect. The following three different types of impacts are considered: 1. Harmonic effects; 2. A single step exposure; 3. The impact with the arbitrary form of the signal. It is shown that in case of a measurement sinusoidal signal the dynamic error is determined by amplitude and phase components. The value of these components depends on the ratio of the period of the measured signal τ and the time averaged constant of the variation structure T of the measurement channel. Herewith, based on the conducted analysis, the dynamic error reduction requires meeting the condition τ > T. If the measured signal is presented in the form of a first-kind jump, the dynamic error is determined by the starting time of the information reading (conversion). Since the output signal of the measurement channel is changed exponentially from the moment of the input signal receipt, the reading moment with the full compensation of the dynamic error should match the time of reaching of the transition function maximum. Under the influence of the arbitrary waveform, the dynamic error is determined as the mathematical expectation of the error of a series of isochronous samples of the measurement result in the interval |t0; t1|.
Keywords: dynamic error; error component amplitude; error phase component; the step impact; arbitrary signal; transient response.
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USE OF PLASMA TECHNOLOGY TO STRENGTHEN ELEMENTS OF ROLLING-CUTTER DRILL BITS (p. 28)
Oleg Gennadievich Blinkov
Ural Federal University, named after B.N. Yeltsin, the first President of Russia 19, Mir str., Ekaterinburg, 620002, Sverdlovsk region, Russian Federation, phone/fax: (912) 241-12-79 (Blinkov O.G.), e-mail: blinkovog@gmail.com
The article presents results of plasma technology application to strengthen the elements of rolling-cutter drill bits. Based on the analysis of the most worn out parts of bearing assemblies of rolling-cutter drill bits, the main reinforcement elements, such as bearing raceways, were chosen both from the side of the rolling-cutter and the leg. The studies resulted in fixing the optimal materials, parameters and modes of the wear-resistant coating’s plasma spraying on bearing assemblies’ raceways of rolling-cutter drill bits. The practical use of studies’ results will allow to significantly increase the reliability and operational life-time of bearing assemblies of rolling-cutter drilling tools and, consequently, the efficiency aa well as to reduce drilling cost.
Keywords: rolling-cutter drill bit; bearing raceways; electric discharge; vacuum ion-plasma method.
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DEVELOPMENT OF A SPECIAL DOWNHOLE SUCKER-ROD PLUNGER PUMP (p. 30)
Zamaddin Sultanali Allakhverdiev
Azerbaijan State Oil and Industry University 34, Azadlyg prosp., AZ1010, Baku, Republic of Azerbaijan, e-mail: sultanelioglu@gmail.com
The article presents the results of some special design change, made in the «cylinder-plunger» couple, to reduce its wear-out – hat's an additional component (centering element) and a packing unit have been installed. Such design change resulted in provision of the alignment of the plunger and the pump cylinder, which reduces wear-out of these components, oil leakage through annular gap between the cylinder and the pump plunger as well as the pump delivery coefficient. The given proposal is of practical value, as it increases the operational life of the pump.
Keywords: wear-out; pump; seal; leakage; cylinder; plunger; bottom hole; valve.
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CHOICE OF A TECHNOLOGY, TECHNICAL EQUIPMENT AND MATERIALS, PROVIDING WELLS’ QUALITATIVE CEMENTATION (p. 33)
Andrey Robertovich Andronikov, Dmitry Fedorovich Novokhatsky, Alexey Evstafievich Nizhnik
Kuban State Technological University 2, Moskovskaya str., 350072, Krasnodar, Russian Federation, phone: 8 (861) 233-18-45, 8 (960) 483-97-67, 8 (918) 377-30-35, e-mail: nizhnikae@mail.ru
The article considers the order of the choice of a technology, technical equipment and cementing materials, providing qualitative cementation of oil and gas wells in different geological-technical conditions of productive deposits bedding. Requirements to a grouting mixture properties and a cement stone are presented.
Keywords: well; productive formation; pressure; temperature; well bottom area; cement; cementing solution; endurance capability; filtration characteristics.
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SOME PROBLEMS IN RESPECT TO DETERMINATION OF A SAFE PACKER OPERATION CONDITIONS OF A GAS WELL IN CASE OF PRESSURE PRESENCE IN THE ANNULUS (p. 36)
Alexander Mikhailovich Likhushin, Vladimir Evgenievich Myasischev, Olga Alexandrovna Kovalevskaya
LLC «Gazprom VNIIGAZ» Phone: (4988) 657-42-28, 8965 232-33-45, e-mail: lihushin@list.ru
Timur Olegovich Myazin
LLC «Gazprom Geologorazvedka»
Issenbay Sotibaevich Kaliev
JSC «Intergaz – Central Asia »
The article discusses the problems in relation to the diagnosis of the causes of annulus pressure occurrence in gas wells. The possible reasons for wells integrity loss are presented. Showing Various methods of diagnosing tests to determine the source of annular pressure occurrence are shown. An algorithm to determine the causes of the annulus pressure occurrence is developed. Determination of the causes of annular pressure occurrence in a gas well allows finding the possibility to regulate the order of wells safe operation in future.
Keywords: gas well; tightness; tubing; annulus pressure; diagnostics; packer; regulations.
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A CONCEPTUAL MODEL OF THE CONTROL AND OPTIMAL PLANNING SYSTEM OF GEOLOGICAL AND TECHNICAL MEASURES (GTM) IN THE FIELDS OF GAS PRODUCING COMPANIES OF PJSC «GAZPROM» (p. 40)
Kurban Sapizhullaevich Akhmedov, Vladimir Alexandrovich Tolpaev
JSC «SevKavNIPIgaz» 419, Lenin str., 355000, Stavropol, Russian Federation, phone: 8 (865) 256-30-26, e-mail: AhmedovKS@scnipigaz.ru, TolpaevVA@scnipigaz.ru
The article presents a brief history of the conceptual models development to control production facilities as well as general recommendations on the purpose and development of conceptual control models in the systems of gas producing companies and underground gas storage of PJSC «Gazprom». Furthermore, a conceptual model of the system of optimal planning and control over the RF gas producing companies is submitted.
Keywords: gas producing companies; hierarchy tree; conceptual model; graphical modeling languages; UML; geological and technical measures; well workover.
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OPTIMIZATION OF THE ACIDIZING OF AN OIL-SATURATED CARBONATE RESERVOIR MATRIX (p. 46)
Hamed Jafarpour, Dmitry Gennadievich Petrakov, Maxim Sergeevich Orlov
St. Petersburg Mining University 2, 21st line of Vasilievsky island, 199106, St.-Petersburg, Russian Federation, phone: +79119780319, +79217881962, +7 (812) 328-84-22, e-mail: Jafarpour.hamed@gmail.com, petrakovdg@mail.ru, orlovmsw@gmail.com
This article presents the actual indicators of a field development. Practical operation of a reservoir matrix acidizing is simulated by means of the software (StimCADE) to assess the results and the well’s work after acidizing. Furthermore, squeezing rate and active composition amount were optimized to minimize the damage of the well’s bottom zone rock. When comparing the results of the real acid treatment, which was carried out in the field, with the results of the optimized acidizing, the positive effect was noted in case of the optimized technology of the matrix acid treatment due to the reduction of the skin-factor effects of a carbonate reservoir. The results of the real acid treatment also proved the fact that HCl 28 % as the first block of the used composition and HCl 15 % as the second one, lead to a better result.
Keywords: acid treatment; matrix; optimization of the inflow stimulation; skin-factor.
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CONCEPTUAL MODELING WHEN SOLVING WEAKLY-STRUCTURED PROBLEMS OF PLANNING AND ESTIMATION OF THE EFFICIENCY INDICATORS OF GEOLOGICAL-TECHNICAL MEASURES IN GAS WELLS (p. 49)
Kurban Sapizhullaevich Akhmedov, Vladimir Alexandrovich Tolpaev
JSC «SevKavNIPIgaz» 419, Lenin str., 355000, Stavropol, Russian Federation, phone: 8 (865) 256-30-26, e-mail: AhmedovKS@scnipigaz.ru, TolpaevVA@scnipigaz.ru
The article proposes a unified approach to solving the problems of the geological-technical measures (GTM) planning in the gas wells fund of PJSC «Gazprom». An algorithm and a block-scheme of GTM planning in wells of gas and gas-condensate fields are presented within the framework of this approach. Prognostic estimation of GTM efficiency indicators in the wells selected for conducting geological-technical measures is proposed. Systematic sequence of GTM planning is determined.
Keywords: geological-technical measures (GTM); GTM efficiency indicator; block-scheme of GTM planning.
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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY" |