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GeoBaikal 2018
- Conference date: August 11-17, 2018
- Location: Irkutsk, Russia
- Published: 11 August 2018
21 - 40 of 114 results
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Enhanced Oil Recovery Technologies for the Arctic Region
Authors L.K. Altunina, V.A. Kuvshinov and I.V. KuvshinovSummaryIn the coming decades, the Arctic region of Russia will be the main reserve of the country's oil and gas production industry. For effective development of oil fields in the Arctic, it is necessary to create and scale up scientifically based oil production technologies adapted to the northern conditions. The paper presents new oil recovery technologies developed at the IPC SB RAS, which can be used in the Arctic fields. The technologies with the use of thermotropic inorganic gelforming compositions GALKA® and MEGA, oil-displacing compositions with controlled viscosity and alkalinity of NINKA® and GBK are promising. The compositions have low freezing point, are effective in a wide range of geological and physical conditions and stages of field development.
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Increasing the Efficiency of the Orenburg Oil and Gas Condensate Field Development Through the Introduction of an Intelligent Gas Injection Control System to Optimize the Gaslift Operation of Wells
Authors V.V. Ulyanov, E.A. Kibirev, M.T. Nukhaev, K.V. Rymarenko and V.S. BakSummaryGaslift is widely used in the world practice of oil production. At the moment, one of the realizations of this production method is used at the Orenburg oil and gas condensate field - a gas compressorless method of operating wells. The paper presents the experience of Gazpromneft-Orenburg on the introduction of an intelligent gas injection control system.
The advantage of the compressor-free gas-lift mode of operation is a significant reduction in operating costs. A feature of this method of operation is the need for continuous control of injection into each well. A system with automatic control valves was introduced to automate the injection of gas in the Orenburg oil and gas condensate field, which allowed point-setting of the injection, constantly monitoring and measuring the gas injection for each well.
The implementation of the concept of an smart field allowed Gazpromneft-Orenburg not only to optimize the operation of the gas lift wells, but also to optimize the work in the field as a whole, including:
- the release of the time for personnel to analyze and make decisions by reducing the routine operations;
- optimization of the operators’ work due to remote control of technological objects, wells;
- Reducing the risks of labor and personnel safety in conditions of high hydrogen sulphide content.
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Description of the Geological Structure and Hydrocarbon Potential of the License Area Rusanovsky the Waters of the Kara Sea by 3d Exploration Seismic Data
Authors V.N. Borodkin, A.R. Kurchikov, V.A. Lukashov, O.A. Smirnov and A.V. PogreckijSummaryThe article presents a brief tectonic timing of the research area, oil and gas characteristics with the release of oil and gas complexes (NGK). On the basis of 3D seismic exploration, seismogeological models are presented, perspective objects are identified, the optimal volume of geological exploration is planned.
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Consideration of Near Surface Anomalies at the Time of Depth Migration
Authors A. Burlakov, S. Ilyin, M. Gabova, I. Shamsutdinov, E. Kuchkanov and P. PopovaSummaryThis report will analyze methods of near surface anomalies’ consideration at the time of depth migration. One of the main troubles with obtaining true location of reflection horizons in depth domain is connected with velocity anomalies in the near surface. Therefore, in our report we will investigate near surface model building with support from seismic data engaging extensive wells’ information. Constructed near surface model will be included in generic depth velocity model.
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Complex Solutions in the Field of Industrial Safety in Geological Investigation Works
Authors P. Didenko and A. SukhodolovSummaryThe region of Eastern Siberia is a difficult area for geological investigation works not only from the point of view of Geology and Geophysics, but also from the point of view of industrial safety. This is harsh climatic conditions, often 100% autonomy, the length of the winter road more than 700 km, the lack of market contractors. In order to reduce injuries, “Gazpromneft-Angara” LLC began to deal with issues of industrial safety in 2012.A lot of results were achieved during the period of 2013–2018 which contributed to the formation of complex solutions in the field of industrial safety, namely: the organization of medical services, transport safety, supervision of industrial safety, requirements for residential wagon-house. It should be noted that “Gazpromneft-Angara” LLC impliment part of the issues on its own.
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Analyzing Modern Technologies for Acquiring, Processing and Interpreting Geophysical Data: The Case of the Arctic Shelf Projects
Authors G.A. Zavarzina, D.S. Shapabaeva, V.A. Kosmynin, R.R. Murzin and O.A. ZakharovaSummaryTurning the Arctic offshore projects into reality remains a distant possibility. However, a valid present-day concept is still needed to develop the oil and gas fields discovered so far and implement prospecting and exploration programmes. A particular emphasis is therefore placed on how we can introduce novel approaches to acquiring, processing and interpreting geophysical data to minimize the costs of exploration activity in the offshore Arctic regions.
This paper discusses both conventional G&G approaches and new technologies aimed at harnessing hydrocarbon resources of the Arctic shelf.
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Aero-tem Effective Magnetic Moment Estimation on the Example of Localization of a Kimberlite Object
Authors I. Ivanova, A. Belaya, A. Chernyshev and G.M. TrigubovighSummaryIn this work an estimation of the affection of current decay time duration on TEM curves by means of mathematical modelling is described. Horizontally layered medium with vertical cylindrical inhomogeneity is taken as a geoelectrical model.
Kimberlites in host rocks form zones of increased conductivity, which represent a criterion of identification of search objects and determine advantage of using the methods of electromagnetic prospecting. In particular, TEM is used for solving search and parameterization tasks for kimberlite objects. However, the effectiveness of TEM application directly depends on the selection of a correct measurement technique, including current decay time duration in the source.
The question arises as to how current decay time duration in a source affects the amplitude of the anomaly caused by the local conductive subvertical object and what time ranges of turn-off current decay time duration are acceptable. This article is devoted to the study of this problem by means of mathematical modelling
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Features of Organogenic Buildups in Osinsky Horizon Facial Zones (Siberian Platform)
Authors E.N. Maksimova and K.N. ChertinaSummaryA comparative analysis of the Cambrian organogenic microbial buildups in various facial zones in the territory of the Nepa-Botuoba anteclise (Eastern Siberia) was completed.
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Structure of the Earth’s Crust and Upper Mantle of the North Muysk Segment of the Baikal Rift Zone According to Seismic-gravity Data
Authors V.V Mordvinova, M.A. Khritova, E.Kh. Turutanov, E.A. Kobeleva and M.M. KobelevSummaryThe performed interpretation of seismic-gravimetric data in the North-Muysky area of the Baikal rift zone makes it possible to estimate the thickness, extent and direction of sinking of the sole of large geological bodies of acidic composition and to isolate in the earth’s crust large-amplitude thrusts with a length of hundreds of kilometers.
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Gazprom Neft Company Experience in Specific Probabilistic Approach for Resource Potential Estimation in Different Exploration Maturity Shelf Project
More LessSummaryGazprom neft company has developed the program of resource base enhancement untill 2025 including Russian shelf licenses. Consequently a resource potential estimation for frontier and emerging areas is important task for exploration process.
In this report Gazprom neft probabilistic approach for shelf projects resource estimation is analyzed and exploration maturity influence on assessment is shown.
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A Critical Analysis of the Experience of Using Intelligent Inflow Indicators for the Continuous Monitoring of Horizontal Wells at the Fields in Russia: Including Prirazlomnoye and Yu. Korchagin
Authors I.R. Mukhametshin, M.T. Nukhaev, A.R. Galimzyanov, A.V. Koloda, O.I. Abramenko and A.A. SenkovSummaryOffshore field development is a complex task, an effective solution of which is impossible without conducting a wide range of research. While developing deposits with long horizontal wells, one of the important tasks is to continuously monitor each of the wellbore intervals to select optimal operating conditions and prevent early breakthroughs of water and gas. The paper presents a critical analysis of the experience of using intelligent inflow indicators for the continuous monitoring of horizontal wells in the fields in Russia. This experience allowed not only to solve local operational problems, but also to update the hydrodynamic models. Knowing the intervals of the maximum and minimum inflow, one can determine the zonal productivity and link it with the geology of the reservoir. The following process is used: the permeability of the various intervals is restored, taking into account the well operating conditions and formation pressure . Then, the integral permeability obtained by well test is compared with results from tracers studies. The last stage is the linkage of the obtained per interval permeability with the petrophysical and facies model. This approach is necessary to obtain a single picture of the geological structure of the reservoir, accurate prediction of the operation of the exploited wells.
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The Selection of the Optimal Development System for Heterogeneous Reservoirs With Hard-to-develop Deposits
Authors M.V. Naugolnov, V.Yu. Klimov, S.Sh. Iskhakova and A.A. SednevSummaryThis work is devoted to the aspects of the selection of optimal development systems for the conditions of highly heterogeneous reservoirs with hard-to-recover reserves using the example of the Achimov deposits of Western Siberia. The choice is based on the use of multivariate 3D hydrodynamic modeling on the basis of various implementations of the conceptual geological 3D model. Different well spacing, methods of well completion and operating modes are considered; the development systems that are best for different facies zones of deep-sea sediments are justified
With the use of multivariate modeling, functions linking the type of completion of the well and the need to organize a reservoir pressure maintenance system with permeability and lateral heterogeneity of the formation are obtained. Sensitivity analysis demonstrated the stability of design solutions to variable geological factors and allowed to assess the value of their influence on technological and economic performance indicators. The proposed methodical approach is relevant not only for the Achimov deposits of Western Siberia, but also for any deposits with hard-to-recover reserves, with high degree of variability or poor knowledge.
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Guidelines for Low-altitude Aeromagnetic Surveys (Russian Federal Agency for Subsoil Use, 2018) - the Main Points and the Authors' Comments
Authors A.V. Parshin, V.S. Tsirel and A.K. RzhevskayaSummaryAt present, in the Russian Federation, the normative base for performing magnetic prospecting is the «USSR Magnetic Survey Instruction Manual, 1981». This document played and plays the major role in methodical maintenance and unification of results of magnetic surveys. However, with the technological progress, there are innovations that significantly change the practice of magnetic prospecting. One such innovation is the robotic magnetometric systems based on light highly maneuverable unmanned aerial vehicles (UAVs), which significantly increased the efficiency of magnetic surveys, especially in complex landscape-morphological conditions. The methodic of such variant of the magnetic prospecting can differ substantially from the traditional methodic of ground and aeromagnetic surveys. It is not regulated by the USSR Instruction, 1981, which makes it difficult to use unmanned geological exploration methods in Russia, and determined the need to develop an appropriate normative document. In this regard, in 2018, the Federal Agency for Subsoil Use prepared and approved the “Guidelines for low-altitude aeromagnetic surveys,” which supplement the classical “Instruction .., 1981” and establish the basic requirements for the produce and quality control of magnetic surveys with UAVs. «Guidelines» summarize the current level of practice and the latest achievements of research in the field of unmanned aerogeophysics and technologies providing it. In this paper, the authors of the «Guidelines» discuss its main theses.
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New Role of Thermal Petrophusical Tehcnologies at Exploration, Prospecting and Development of Oil-gas Fields
Authors Yu. Popov, E. Popov, E. Chekhonin, A. Gabova, E. Savelev and A. GoncharovSummaryNew thermal petrophysical technologies, developed in 2014–2018, have been promptly implemented for solution of different problems in exploration, prospecting and development of hydrocarbon fields. During last few years vast measurements of rock thermal properties - thermal conductivity, thermal diffusivity, volumetric heat capacity, thermal anisotropy coefficient, coefficient of linear thermal expansion - have been performed with the new technologies on more than 30 000 core samples from 31 wells drilled in 26 oil-gas fields of heavy oil and unconventional reservoirs. Integration of the new thermophysical technologies with well logging methods and new established correlations of the thermal properties with other rock properties allowed us to improve essentially effectiveness of methods of thermal petrophysics and to extend areas of their applications in oil-gas industry. The developed technology of non- contact non-destructive continuous thermal core logging provides high-resolution recording variations of rock thermal properties with a spatial resolution of ~1 mm and is combined with following measurements of the thermal properties at formation temperatures up to 300 C. The new thermophysical technologies become particularly actual in conditions when significant multi-scale heterogeneity and anisotropy of rocks within many hydrocarbon fields reduce effectiveness of standard petrophysical logging methods due to their restricted spatial resolution.
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Importance of Conceptual Geological Model in Probabilistic Field Assessment
By O.A. PopovaSummaryAppearance of probabilistic geological models has created an impression that one of the oldest and the most common problems of deterministic modelling - failure of initial assessments - is solved. Indeed, probabilistic model considers a large set of possible realizations of the deposit geology, and, in the perfect world, the range of uncertainty should be narrowed with obtaining new data. However, a new well often brings surprises: either it widens the uncertainty interval, or moves it beyond the initial distribution. Repetition of such cases leads to disappointment in probabilistic models. Should not we stop using them? Analysis of successful and unsuccessful probabilistic case studies shows that one of the reasons that can critically affect the results of assessment and the project as a whole is the choice of conceptual geological model for the object. The paper considers the existing views on the idea of conceptual model and suggests an updated interpretation of it. In the context of probabilistic modelling, the creation of a conceptual framework is an integral part of uncertainty analysis and decision making. And the correct consideration of all possible geological concepts makes it possible to reduce the number of “black swans”.
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Distortion of the Reflected Wave Hodograph Using the Floating Reduction Level on the Example of the Eastern Siberia Region
By A.A. PyankovSummaryIn the last period there seems to be considerable interest in the production of 3D surveys in areas of Eastern Siberia. In the process of designing the field work, as a rule, the study of the upper part of the cut is not given due attention. When processing seismic data in areas with highly variable terrain of the observation surface is used not flat, but “floating” level of reduction. The effect of non-horizontal boundaries based on the OGT seismogram leads to overestimated velocity estimates. For the correct analysis of summation rates, it is proposed to calculate and use the local statics for the floating level of processing on each base of the OGT
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Southern Baikal Region as a Model Site for Studying Late Proterozoic Deposition and Oil Generation History
SummaryГеологический семинар будет интересен для специали-стов нефтегазового сектора. Часть маршрута будет про-?ходить на корабле по Байкалу от пос. Листвянка до пос.Большое Голоустное. В этом интервале протяжённостью?60 км по берегам обнажаются породы, которые отража-ют значительную часть земной истории. Вдоль Листвянки?и за ней вскрываются гранитоидные толщи, возраст фраг-ментов которых датируется от 2,8 до 3,4 млрд. лет. Они?прорываются дайками базитов мезо, неопротерозойскогои палеозойского возрастов. За посёлком Большие К оты эти?породы сменяются конгломератовой толщей юры с про-пластками углей, которые прослеживаются на север в Че-?ремховский угольный бассейн и имеют ориентировочныйвозраст 170 млн. лет. Далее к северо-востоку при прибли-?жении к посёлку Большое Голоустное, в пади Кадильнаяогромными столбами встают известняки с определённым?возрастом 580 млн. лет. Самым замечательным в них яв-ляются прекрасно отпрепарированные строматолитовые?постройки – свидетель цианобактериальной (и водоросле-?вой?) жизни в то время. И при приближении к посёлку поберегу озера вскрываются разрез голоустенской свиты не-?опротерозоя и галечно-песчаные отложения морского днаБайкала, образованные в последний миллион лет. По пути?от Большое Голоустное к Иркутску, вдоль рек Голоустнаяи Правая Ушаковка в придорожных обнажениях наблюда-?ются фрагменты разреза неопротерозойских толщ, частькоторых является нефтематеринскими. Судя по данным?бурения, к северу они фациально меняются и выклинива-ются. При приближении к Иркутску разрез наращивается?поздневендскими и нижнекембрийскими отложениями,которые перекрываются песчаниками юры.
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The Sedimentary Structure of the Siberian Platform Cambrian Marginal Basins and the Methodological Causes of Some Tectonic Errors
By S. SukhovSummaryThe integrated multiyear study results of Cambrian sedimentary architectures are presented. They are based on outcrops, well records and seismic-reflection data as well as sedimentation modeling. The analysis allow to reconstruct reef-rimmed carbonate platforms attended by open edge craton basins and explain dipping as progradational stacking pattern with clinoforms, the infilling of the accommodation in contrast to popular tectonic interpretation.
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