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N. I. Nikolaev
Professor, Ph.D., Dr.Sci.
Санкт-Петербургский горный университет
Personal or department link
Professor, Ph.D., Dr.Sci.
Personal or department link
Санкт-Петербургский горный университет
Saint Petersburg
Russia
226
Total cited
9
Hirsch index

Articles

Oil and gas
  • Date submitted
    2019-05-14
  • Date accepted
    2019-07-05
  • Date published
    2020-04-26

Development of spacer fluids and cement slurries compositions for lining of wells at high temperatures

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Article is devoted to creation of new compositions of process solutions for lining of directional wells at high temperatures. Developed compositions provide high durability characteristics of cement stone. It is shown that with an increase in packing density of cementing slurry components durability characteristics increase and porosity and permeability of cement stone decrease, whereas an increase in temperature and pressure leads to a significant increase in compressive and bending durability, which is associated with presence of quartz in them. It has been established that introduction of special structure-forming additives to the composition of developed cementing solutions allows formation of sedimentation-resistant cement systems that can provide an increase in durability characteristics of cement stone and, in general, quality lining of directional wells. Study of rheological properties of developed cementing compositions showed that the systems have high yield strength at increased temperatures and pressures. Developed compositions of water-based spacer fluids increase the cleansing degree for both casing and rocks surfaces from mud and clay cake residues, which improves the cementing quality of oil and gas wells. Mechanism for increasing the washing ability of spacer fluids and durability characteristics of cement stone, depending on composition and properties of their constituent components, is disclosed.

How to cite: TABATABAEE MORADI S.S., NIKOLAEV N.I., NIKOLAEVA T.N. Development of spacer fluids and cement slurries compositions for lining of wells at high temperatures // Journal of Mining Institute. 2020. Vol. 242. p. 174. DOI: 10.31897/PMI.2020.2.174
Oil and gas
  • Date submitted
    2018-11-20
  • Date accepted
    2019-01-14
  • Date published
    2019-04-25

LOW-DENSITY CEMENT COMPOSITIONS FOR WELL CEMENTING UNDER ABNORMALLY LOW RESERVOIR PRESSURE CONDITIONS

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The paper considers variants of lightweight cement compositions with additives of various substances, such as clay components, ash systems, silica additives, kerogen, gilsonite, microspheres, as well as the process of cement slurry aeration. Recommendations on the use of compositions in different conditions are presented. A decrease in the density of the solution is achieved not only due to the low density of the materials used, but also as a result of an increase in the water-cement ratio. In such conditions, it is not possible to ensure the formation of a durable and impermeable cement stone in the well, which creates high quality inter-reservoir insulation. The characteristics of the physical and mechanical properties of existing lightening additives are given, which allows determining the most rational conditions for the use of cement slurries for improvement of the well cementing quality.

How to cite: Nikolaev N.I., Leusheva E.L. LOW-DENSITY CEMENT COMPOSITIONS FOR WELL CEMENTING UNDER ABNORMALLY LOW RESERVOIR PRESSURE CONDITIONS // Journal of Mining Institute. 2019. Vol. 236. p. 194. DOI: 10.31897/PMI.2019.2.194
Oil and gas
  • Date submitted
    2017-03-07
  • Date accepted
    2017-05-05
  • Date published
    2017-08-27

Results of cement-to-rock contact study

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The paper focuses on the problems of oil and gas well cementation. It has been established that the main reason why formation fluids leak behind the casing is due to poor isolation of the annulus caused by incomplete cleaning of the filter cake, which results in weak or absent adhesion between the cement and the rock. The authors demonstrate that adding polymer modifier GM-II to the spacer fluid strengthens the cement-to-rock contact by several times. Moreover, mixing spacer with cement slurry does not degrade such important properties as spreadability and consistency of the latter. The paper contains investigation results on the content of polymer spacers that improve cementation quality of oil and gas wells. Spectral infrared and X-ray analysis allowed to define the impact of phase composition and mineral structure of the system «cement stone-filter cake-formation rock» on improving leak tightness of the annulus. Electron microscopic study showed that the use of polymer spacers facilitates formation of felted net-like structures between hydrated minerals. The composition of these structures, binding cement grains and clay minerals, has been studied by means of energy dispersive X-ray microanalysis. Obtained results allow to come to the conclusion that these structures mostly consist of hydrated calcium silicate (more than 77% by mass), which agrees well with the findings of infrared and X-ray analysis. Pilot tests, performed at the Shengli oil field in China, have confirmed efficiency of developed spacer fluids.

How to cite: Nikolaev N.I., Khaoya L. Results of cement-to-rock contact study // Journal of Mining Institute. 2017. Vol. 226. p. 428. DOI: 10.25515/PMI.2017.4.428
Oil and gas
  • Date submitted
    2015-11-30
  • Date accepted
    2016-01-08
  • Date published
    2016-05-01

Resistance of rocks to crushing during well drilling

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The paper presents properties of the rocks according to their resistance to drilling. The effects of differential pressure on the rock drillability and changes in rocks strength depending on the depth of their occurrence and crushing conditions are examined. The interlinkage between technological processes for rock crushing at the borehole bottom and breaking stresses has been analyzed. The interlinkage between the breaking loads and deformations of rocks with account of their structural changes and rate of loading has been assessed. The relevance and applicability of identified regularities between stresses, deformations and differential pressure for solving practical tasks of efficient rock crushing in the course of drilling have been assessed. Issues of providing theoretical evidence for the rock breakage with the rock cutting tools in the bottom-hole conditions have been reviewed. It is proven that the rock destruction effect of drilling depends not only on the value of the breaking load but also on the rate of its application.

How to cite: Dolgii I.E., Nikolaev N.I. Resistance of rocks to crushing during well drilling // Journal of Mining Institute. 2016. Vol. 221. p. 655. DOI: 10.18454/PMI.2016.5.655
Oil and gas
  • Date submitted
    2015-09-16
  • Date accepted
    2015-11-22
  • Date published
    2016-03-01

Development of drilling fluids composition for efficiency increase of hard rocks drilling

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The article deals with ways of rock weakening for efficiency increase of hard rocks drilling, also development of drilling fluid composition is considered. Aim of the project is to develop drilling fluid composition which increases efficiency of hard rocks destruction. Authors conducted experimental investigation of drilling fluid composition development and their main structural rheological and filter characteristics. Influence of various solutions, including developed one, on hard rocks destruction process is evaluated on introduced testing bench. Investigation results indicate that composition and characteristics of developed drilling fluid positively influence hard rocks destruction process. Implementation of clayless drilling fluid with anion-active surfactant composition additives allows boost of drilling operations performance by increase in mechanical velocity of drilling and drill meterage per bit.

How to cite: Nikolaev N.I., Leusheva E.L. Development of drilling fluids composition for efficiency increase of hard rocks drilling // Journal of Mining Institute. 2016. Vol. 219. p. 412. DOI: 10.18454/PMI.2016.3.412
Oil and gas
  • Date submitted
    2015-08-25
  • Date accepted
    2015-10-24
  • Date published
    2016-02-01

The modern technology of drilling and casing of well during the exploration of gas hydrates

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In the paper, the perspectives of exploration and completion of gas hydrate fields and the drilling problems in the gas hydrates of the northwest china are studied. It has been established, that the main reasons of complications in the Muli field are the secondary hydrate formation on the walls of the well and drilling assembly and ice formation inside the set cement during the well drilling and completion in permafrost. It has been shown, that in the areas with permafrost during the drilling of the layers containing gas hydrates, temperature and pressure changes can lead to the dissociation of hydrates. At the same time, pressure increase in the annular space due to the gas release, can lead to the secondary formation of gas hydrates, drill string stuck, ceasing of drilling fluid circulation, which is the reason of serious trouble in the wellbore. The results of the research on the development of drilling fluids compositions, which lower the drilling troubles of permafrost, are presented. Comparative experiments have been conducted to evaluate the effectiveness of thermodynamic and kinetic inhibitors, which prevent the repeated hydrate formation. It has been established, that the kinetic inhibitors have the clear advantage: they have good inhibiting effects even with low amounts of additives. In the laboratory conditions, the researches have been conducted to evaluate the phase equilibrium of gas hydrates during their reaction with the water solutions, containing kinetic inhibitor PVP. A thin clay drilling mud has been developed on the water base, providing the holding of the temperature in the level of –2 °С and its effectiveness for the gas hydrate fields in the PRC has been shown. Casing effectiveness of unstable rocks during the drilling in the conditions of negative temperatures inside the well largely depends on their physical-mechanical properties, composition and the technical indicators of cement materials. The authors suggest the composition of quick-setting cements based on aluminum binding materials. It has been established, that the analyzed compositions have the ability to considerably improve the results of cementing. 

How to cite: Nikolaev N.I., Tyanle L. The modern technology of drilling and casing of well during the exploration of gas hydrates // Journal of Mining Institute. 2016. Vol. 218. p. 206.
Geotechnology for development of liquid and gas mining fields
  • Date submitted
    2011-11-15
  • Date accepted
    2012-01-23
  • Date published
    2012-05-01

Development of the weighted biopolimer drilling mud for workover

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The results of research are related, with effective composition of process fluids for oil and gas workover.

How to cite: Litvinenko V.S., Nikolaev N.I. Development of the weighted biopolimer drilling mud for workover // Journal of Mining Institute. 2012. Vol. 199. p. 375.
Present-day problems of geological exploration and well drilling
  • Date submitted
    2011-09-16
  • Date accepted
    2011-11-22
  • Date published
    2012-03-01

Mathematic model of well cementation when constructing and operating of oil and gas wells

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In this article were shown research results connected with development of mathematical model of cementation in high-permeability rock at drilling and repair of oil and gas wells.

How to cite: Litvinenko V.S., Nikolaev N.I. Mathematic model of well cementation when constructing and operating of oil and gas wells // Journal of Mining Institute. 2012. Vol. 197. p. 9.
Current problems in geology and exploration of mineral deposits
  • Date submitted
    2010-12-24
  • Date accepted
    2011-02-09
  • Date published
    2011-06-01

Technological fluids for increasing effectivity of construction and exploitation oil and gas wells

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It shows the experimental results connected with creating of effective compositions of technological fluids for drilling and repair of oil and gas wells.

How to cite: Litvinenko V.S., Nikolaev N.I. Technological fluids for increasing effectivity of construction and exploitation oil and gas wells // Journal of Mining Institute. 2011. Vol. 194. p. 84.
Drilling
  • Date submitted
    2008-10-18
  • Date accepted
    2008-12-24
  • Date published
    2009-04-01

Higher efficiency in drilling of oil and gas wells under complicated conditions

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The results of researches of properties of the new native waterswelling polymer «Petrosorb» are given. Description is given to the design of plugging-up tool for liquidation of catastrophic absorption of flushing fluid in the course of drilling of oil and gas wells.

How to cite: Nikolaev N.I., Ivanov A.I. Higher efficiency in drilling of oil and gas wells under complicated conditions // Journal of Mining Institute. 2009. Vol. 183. p. 308.
Without section
  • Date submitted
    2000-07-24
  • Date accepted
    2000-08-09
  • Date published
    2001-02-01

Energy balance of rock fracture and contact problems of exploratory drilling

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The study of energy balance in rock fracture is one of the directions of the scientific school of deformable solid mechanics developed for several decades at the Department of Structural Mechanics of the St. Petersburg (Leningrad) Mining Institute. The formation of this school is connected with the works of L.S. Burshtein, N.S. Bulychev, N.N. Kaidalov, A.N. Stavrogin and others. The practical results of this school are known at many sites of underground construction, in the mining industry, in exploratory drilling. Within the framework of this article, modern ideas about the mechanism of transformation of potential energy of elastic compression into dynamic types of energy during brittle fracture are briefly described, the balance of energy of this process is given, as well as examples of its use in solving a number of contact problems of exploratory drilling, least covered in the technical literature.

How to cite: Gorshkov L.K., Tarasov B.G., Nikolaev N.I. Energy balance of rock fracture and contact problems of exploratory drilling // Journal of Mining Institute. 2001. Vol. № 2 148. p. 136-141.
Without section
  • Date submitted
    2000-07-09
  • Date accepted
    2000-08-26
  • Date published
    2001-02-01

Specifics of drilling flowing wells in intervals of unstable formations

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One of the most common types of geological complications arising when drilling wells through permafrost rocks is the violation of wellbore integrity due to changes in the natural stress state of the surrounding massif. Securing the wellbore walls with casing requires switching to a smaller drilling diameter, and the use of grouting materials for grouting fractured rocks is ineffective, since cracks are usually filled with ice, preventing the penetration of grouting material into them.

How to cite: Nikolaev N.I., Tsygelnyuk E.Y., Konokotov N.S., Shatov N.A. Specifics of drilling flowing wells in intervals of unstable formations // Journal of Mining Institute. 2001. Vol. № 2 148. p. 164-167.
Without section
  • Date submitted
    2000-07-25
  • Date accepted
    2000-08-25
  • Date published
    2001-02-01

Research and development of advanced technologies of drilling wells in complicated conditions

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The primary results of the research and engineering work of the Department of Technology and Technique of Well Drilling, carried out and completed in 2000, are presented. The main result of drilling long wells in the ice of Antarctica is the development of the project of environmentally safe opening of the subglacial Lake Vostok, a unique natural phenomenon, the complex study of which is of the greatest interest to the world scientific community. A 505 m long well with full core recovery was drilled on the Academy of Sciences glacier (Severnaya Zemlya archipelago) in the framework of the international environmental program PEGAIS. Geophysical measurements were carried out in the well. A new method of tubeless casing and sealing of anomalous intervals using a fusible binding material and a thermal plugging penetrator was developed. Basic theoretical and technological principles of liquidation plugging of hydrogeological wells with the use of economical and environmentally safe cementing mortar based on cheap mineral waste were developed. Effectively conducted research and experimental developments on the combined heat and hydrodynamic effects on low-productive sands to increase oil and gas production wells, clarified the laws of the hydro and foam core. New applied programs for PC were formed, allowing to increase adequacy of data and to expand the field of application in evaluation of regulation and stabilization of circulation and heat exchange processes during well sinking and development.

How to cite: Litvinenko V.S., Kudryashov B.B., Nikolaev N.I., Nifontov Y.A., Chistyakov V.K., Shelkovnikov I.G., Yakovlev A.M., Kozlov A.V., Vasilev N.I., Zubkov V.M., Dmitriev A.N., Solovev G.N., Talalai P.G., Nikishin V.V., Taninskii P.Y., Tsygelnyuk E.Y. Research and development of advanced technologies of drilling wells in complicated conditions // Journal of Mining Institute. 2001. Vol. 147. p. 30-47.
Without section
  • Date submitted
    1992-07-12
  • Date accepted
    1992-09-04
  • Date published
    1993-01-01

Беструбное закрепление неустойчивых интервалов разведочных скважин

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Одним из наиболее распространенных видов геологических осложнений, возникающих при бурении скважин на твердые полезные ископаемые, является нарушение целостности ствола вследствие изменения естественного напряженного состояния окружающего массива горных пород. 

How to cite: Nikolaev N.I. // Journal of Mining Institute. 1993. Vol. 136. p. 106.
Without section
  • Date submitted
    1992-07-29
  • Date accepted
    1992-09-09
  • Date published
    1993-01-01

Технологические особенности тампонирования скважин с использованием комплекса ССК

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Широкое внедрение комплексов ССК в практику ведения буровых работ позволило значительно сократить непроизводственные затраты времени на спуско-подъемные операции ...

How to cite: Nikolaev N.I., Gorshkov L.K. // Journal of Mining Institute. 1993. Vol. 136. p. 110.
Without section
  • Date submitted
    1987-08-30
  • Date accepted
    1987-10-02
  • Date published
    1988-02-01

Совершенствование технических средств и технологии тампонирования зон осложнений в скважинах сухими быстросхватывающимися смесями

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Основной технологической особенностью оперативного тампонирования скважин сухими быстросхватывающимися смесями (ВСС) является доставка в заданный интервал определенного количества тампонажного материала, его затворение водОй и переработка специальными тампонажными устройствами непосредственно в зоне геологического осложения ...

How to cite: Nikolaev N.I., Ishchenko A.I. // Journal of Mining Institute. 1988. Vol. 116. p. 36.
Without section
  • Date submitted
    1984-09-10
  • Date accepted
    1984-11-17
  • Date published
    1985-03-01

Исследование технологических параметров процесса тампонирования скважин

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Применение так называемых «сухих» быстросхватывающихся смесей (БСС) на основе минеральных вяжущих веществ в качестве тампонирующего материала для изоляции зон геологических осложнений (поглощений очистного агента, водопритоков и приуроченных к ним интервалов неустойчивых горных пород) потребовало создания ряда специальных устройств для доставки и переработ­ки БСС непосредственно в интервале скважины, подлежащем тампонированию ...

How to cite: Nikolaev N.I., Kovalenko V.I. // Journal of Mining Institute. 1985. Vol. 105. p. 59.
Without section
  • Date submitted
    1981-09-06
  • Date accepted
    1981-11-20
  • Date published
    1982-03-01

Оценка эффективности метода ускоренного тампонирования скважин

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При геологоразведочном бурении на ликвидацию всевозможных осложне­ний затрачивается до 25 % календарного времени работы буровых установок, а производительность бурения в ряде случаев снижается вдвое ...

How to cite: Nikolaev N.I., Tereshchenko L.A., Gorshkov L.K., Yakovlev A.M. // Journal of Mining Institute. 1982. Vol. 93. p. 35.
Without section
  • Date submitted
    1959-07-02
  • Date accepted
    1959-09-05
  • Date published
    1960-01-01

ЭКОНОМИЧЕСКАЯ ЭФФЕКТИВНОСТЬ МЕХАНИЗИРОВАННЫХ СПОСОБОВ УБОРКИ ПОРОДЫ ПРИ ПРОХОДКЕ СТВОЛОВ

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Как известно, погрузка породы при проведении вертикальных ство­лов шахт, занимая 60—80% времени проходческого цикла, является наи­более трудоемким и трудно поддающимся механизации процессом. По­этому особо важное значение имеет выбор наиболее рационального спо­соба погрузки породы. Основным критерием для этого обычно служит суммарная производительность машин на погрузке, т. е. учитывается только сокращение времени на погрузку и достигаемое за счет этого увеличение скорости проходки. При этом совершенно упускается себе­стоимость погрузки породы, которая оказывает существенное влияние на себестоимость сооружения ствола.

How to cite: Nikolaev N.I. // Journal of Mining Institute. 1960. Vol. № 1 42. p. 158.