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Tyumen 2017
- Conference date: March 27-31, 2017
- Location: Tyumen, Russia
- Published: 27 March 2017
1 - 20 of 70 results
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Laboratory Studies of Polymer Systems Used in the Water Shut-Off Technologies for Specific Geological Conditions of Development Objects
Authors N.N. Barkovsky, O.I. Yakimov, A.M. Amirov and О.А. MorozyukSummaryPrevious laboratory research in recent years shows the lack of comprehensive methodologies for laboratory support for the introduction of new EOR methods on the fields of Russia. Given the growth in the volume of innovative technologies and the need to implement the strategic objectives to increase the recovery factor, there is a need for a method to test each type of technology. In this paper we consider the question of an integrated approach to laboratory testing of polymer systems used in technologies to reduce water: proposed procedure for research waterproofing system in the “outside media” and the use of core material comprising the study of all necessary parameters characterizing the efficiency of the reactants.
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The Model of the Microstructure of a Clastic Oil and Gas Reservoir Rock
Authors V. Berezovsky, I. Belozerov, M. Gubaydullin and A. Yur’evSummaryAn approach to solving the problem of mathematical modeling of porous media macroscopic properties, using the method of molecular dynamics for the 3D-reconstruction of the reservoirs rock microstructure. The results of numerical calculations and their comparison with the full-scale experiment has been presented. There is a general tendency to overestimate permeability, that may be associated with the use of a rather crude resistive model to estimate permeability.
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Express Method of Hydrocarbons Group Analysis and Rheological Properties Evaluation by NMR Relaxometry
Authors A. K. Turakhanov, E.A. Fursenko, V.N. Glinskikh and M.Y. ShumskayteSummaryNuclear Magnetic Resonance (NMR) today is widely used in the oil industry for reservoir porosity and permeability estimations. But it is also vital in the oil industry to get information about rheological properties and composition of oil as early as possible. There are several methods of estimating fluid’s viscosity basing on the NMR data, but no one is fully accepted. As for oil group analysis, there is a little material about low-field NMR relaxometry composition predictions in the literature, although hydrocarbon composition strongly influences on the rheological properties. That is why this work is devoted to hydrocarbons group analysis and rheological properties evaluation by NMR relaxometry.
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Comprehensive Evaluation of the Technologies of Acid Treatment in the Laboratory
Authors A.M. Amirov, N.N. Barkovsky and O.I. YakimovSummaryAcid treatments is an effective and widely used method of influence on well bottom layer zone, designed to increase or restore the productivity of production and injectivity of injection wells.
The efficiency obtained when implementing technology in the wells directly depends on the quality selection of reagents in laboratory conditions for specific geological and physical conditions of the development objects. Insufficient coverage of laboratory studies may lead to a decrease in productivity of the reservoir to be treated, and as a consequence, the loss of oil production. To improve the quality of research is needed a unified approach to laboratory simulation that includes research in the “free volume” and filtration tests on of kern material.
In this work addressed the issue of an integrated approach to the study of laboratory reagents used at carrying out acid treatments. The order of studies acid compositions, including deflecting systems and failsafe acid compositions in the “free volume” for the different collectors and methods of making filtration tests on of real kern material based on rock thermobaric layer mode.
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Investigation of Formation Damage of Reservoir Rocks Due to Inorganic Salt Precipitation
More LessSummaryDeposition of inorganic salt can cause formation damage and reduction of oil production from the reservoirs. This process occurs more during waterflooding. Different parameters affect the permeability reduction due to salt precipitation. In this work, to investigate formation damage, coreflooding experiment was conducted. For this purpose, two injection and formation waters were injected into the real core samples. The rock permeability, before and after salt precipitation, was determined under reservoir conditions. The tests were performed at different reservoir temperatures (60, 80, 100 °C). The results showed that the increasing temperature caused more formation damage. After completing the experiment, the damaged permeability reached to 55 % of initial permeability of core samples. Based on the data obtained from experimental work, a new correlation was developed for prediction of formation damage due to salt precipitation using the Matlab program. The predicted values using the correlation are near the experimental data. It confirms that the correlation can be used to predict formation damage with high accuracy. The correlation depends on the temperature, injection rate, ion concentration, and pore volume injected.
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The Effectiveness of Acid Treatments Bottomhole Formation Zone in Clastic Reservoirs of Perm Krai
Authors V.V. Plotnikov, P.N. Rehachev and N.N. MikhailovSummaryTo date, the acid treatment of the bottomhole formation zone is one of the most common and effective geological and technical activities on the fields of the Perm region of hydrocarbons. These geological and engineering is used as the carbonate, and in clastic reservoirs, while, as a rule, based on the acid compounds are used either hydrochloric (HCl), or “mud” (HCl + HF) acid, respectively. The acid treatment is carried out as in the old fund of wells when the filtration properties of the bottomhole formation zone significantly reduced loss of asphalt-paraffins, salt and rock particles and the newly drilled wells for cleaning the bottomhole formation zone of process fluids - mud and killing compounds. Theoretically, the acid treatment of the target range should improve hydrodynamic connection with the formation of the well, but is not uncommon after such well interventions hydrocarbon production rates, not only did not increase, but decrease. In this paper, the authors present some of the results of laboratory studies of acid treatments clastic rocks as it is timed to 38% of the reserves of hydrocarbon deposits of the Perm Prikamye.
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CGG Vostok: Up-to-Date Interpretation Techniques
Authors S.N. Ilyin and M. RomanenkoSummaryImproved processing algorithms and the emergence of new procedures designed to improve the quality of seismic images and to obtain more information about the subsurface structure, will inevitably lead to necessity of including this information in the interpretation process. Seismic interpreters have to try utilizing that information. Here we consider the examples of untypical seismic information, which became available in recent years, as well as the extent to which it is used in the interpretation process.
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CGG Vostok: Implementation of Latest Processing Technologies
More LessSummaryLatest processing technologies enable to solve the traditional problems faced by processors at a new level of quality and detail. The latest algorithms include high resolution velocity model building tools (FWI, SWI, anisotropic non-linear tomography), data-driven land demultiple techniques (SRME type of modelling , adaptive subtraction), wide azimuth data processing flow. Success of a hi-tech processing project strongly depends on the close cooperation berween processing and reservoir team.
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A Layer-Based Velocity Model Building: Possibilities and Limitations
Authors R.G. Anisimov, R.T. Davletkhanov, S.L. Langman, O.A. Silaenkov and D.B. FinikovSummaryIt will be shown how the seismic processing should be organized in our opinion for the accounting of a velocity model building stage from the earliest steps of seismic processing. Also it will be demonstrated which tools we have for performing such approach.
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Use of Geomechanical Modeling for Well Drilling in the Fields of LLC “LUKOIL-Western Siberia”
Authors D.V. Malyutin, D.I. Bakirov, E.V. Babushkin and D.S. SvyatuhovSummaryOil and gas industry is currently facing a serious challenge - general deterioration of reserves structure together with natural depth increase of developed deposits, and a significant reduction of reservoir pressure at fields developed at eighties. All of these reasons show the necessity of use of every available knowledge and technology. In recent years, LUKOIL is rapidly developing a geomechanical modeling, especially in well planning: pore pressure prediction, wellbore stability while drilling, etc. Branch of LLC “LUKOIL-Engineering” “KogalymNIPIneft” was actively involved in the development of geomechanical modeling in Western Siberia in 2014. During the period of 2015–2016, specialists of drilling department made constructional geomechanical models of wellbore stability in the following fields of LLC “LUKOIL-Western Siberia”: Vateganskoe, Povkhovskoye and Pyakyakhinskoye fields. The results obtained were used in the analysis of complications and the development of the prevention strategy, during drilling of explorational, directional and horizontal wells and sidetracks.
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Shallow Depth Seismicity and Stress State of Sakhalin Earth Crust Relation Based on Deep Borehole Logging Data
Authors T. Voronina, L. Bogomolov, A. Zakupin and P. KamenevSummaryThe paper covers calculations and estimation of stress state of terrigenous sedimental rocks oil & gas fields of Sakhalin, and its relations with local shallow depth seismicity. The values of maximal horizontal and vertical stress have been calculated for different depths. The maximal sublateral stress could exceed the vertical stress by 2–3 times in average. Observation of shallow depth seismicity near Polyarninskoe and Aniva fields showed, that horizontal stress state of Sakhalin sedimental rocks is characterized by horizontal stresses near to Mohr-Coulomb failure criterion.
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Building Seismically Guided Integrated Hydrodinamic and Geomechanic Model Based on the Effective Model of the Medium
Authors S.E. Kopunov, S.A. Tikhotskiy and I.O. BayukSummaryUsing seismic data to estimate reservoir properties and parameters of the stress-strain state of the environment in the inter-well space can significantly improve the quality of the complex hydrodynamic and geomechanical model as a basis for oil field development planning, drilling risk assessment and complications during drilling and completion of the reservoir.
Effective model of the rock based on Theory of Effective Medium, is the basis for a correct upscaling of dependencies between the static elastic properties measured on core samples and dynamic properties received from sonic and and seismic attribute analysis. This technique allows to take into account non-linear behavior of the dependencies, obtained during core laboratory tests on ultrasonic frequency range and provide smart upscaling tool for reservoir properties propagation with logging and seismic data. Various aspects of building integrated seismically guided 3D static, dynamic and geomechanical model and are discussed and illustarated on the model of one of the parts of clastic oil reservoir. Comparison made between conventional hydrodynamic and coupled modeling for depletion drive scenario.
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Brazilian Test and Static Strength
By V.A. VavilinSummaryIn this paper we present some results of a study of static deformation characteristics of rocks at reservoir conditions in comparison with the results of the Brazilian test. The mechanical strength properties of rocks (static and dynamic elastic modulus, Poisson’s ratio, Young’s modulus, shear modulus, compressibility, the limits of elasticity, strength) were defined in conditions close to the reservoir conditions - this is the most relevant information for a variety of tasks, related to the calculation of reserves, mining and oil recovery enhancement. However, all of these modules of rocks were determinates under compression conditions (uniaxial or hydrostatic compression). Getting of important information about the tensile strength of the rock in the atmosphere, and, especially, at reservoir conditions, much more complicated. Therefore, to estimate tensile strength, we used indirect tensile test (the so-called “Brazilian test”). Comparison of the results of research of static deformation characteristics of rocks at reservoir conditions with the results of the Brazilian test are showed a satisfactory correlation between the tensile strength and static modulus of elasticity.
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Earth’s Crust Using Log Data with Unknown Regional Stress Regime
Authors N.V. Dubinya and K.A. EzhovSummaryIn the paper the approach previously proposed by the authors (using microimager data on fractures to determine horizontal stresses) is applied for the case when no information regarding the regional stress regime is resent. It is shown that the analysis of fractures’ orientation and activity may be used to considerably decrease the uncertainty in the horizontal stresses profiles. The approach was applied for one oil reservoir and made it possible to define the value of the minimum horizontal stress for the region and also proved the stress regime in the region.
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Comprehensive Engineering Approach: Geomechanics, Geosteering and Petrophysics Application while Planning and Execution of Well Construction
Authors A.E. Sobolev and Y. PetrakovSummaryA comprehensive engineering approach based on use of geomechanics, geosteering and petrophysics makes well construction safe and efficient at any stage of field development. This integrated approach is applied while drilling itself, at the stage of its planning and preparation, as well as by a detailed elaboration of well completion processes and procedures. The real-time support based on the described method gives a synergy that significantly optimizes a well construction process at all stages. This methodology implemented into the software “Geonaft” allows use of a unified platform for the full cycle of support at the well construction.
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Differentiated Approach Getting Relations FF – Porosity and RI – Water Saturation Depending on Rock Properties and Structure of pore Space
Authors N.A. Popov and D. GlushkovSummaryThe study of electrical parameters of core plugs gave relationship with their capacitive properties and get petrophysical basis for interpretation of well logging. As a result of research limestone characterized by high heterogeneity of reservoir properties. They vary widely. This caused a large range of variation of the electrical parameters, is directly dependent on the porosity. On the electrical properties of rocks affects several factors. For limestone chief among of them are the porosity and collector type.
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The Advantages of using Zonal GGM for Long-Term Planning and Monitoring of Exploration in the Shaim Area
Authors A. S. Ablyazov, N. Y. Sidorov and V.A. SavenkoSummaryThe article is devoted to synthesis of materials of seismic 2D, 3D, and deep drilling. The result is the creation of a single zonal geological-geophysical model was able to resolve the contradictions in indexing and stratification of the strata of Jurassic age in the regional parts of the fields and their areas of articulation, as well as to identify a large amount of exploration.
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Integrated Interpretation of Reflected and Scattered Waves in Complex Geological Section of Ancient Platform
Authors E.V. Anokhina, E.V. Demidova, G.N. Erokhin, A.N. Kremlev, L.F. Zhegalina and M.N. NazarovaSummaryIntegrated interpretation of reflected and scattered waves in complex geological section of ancient platform.
The special aspects of seismic data interpretation were considered in terms of geological section folded by ancient sediments.
The connection of destruction zones with hydrocarbons deposits were shown and mapped to the scattered waves field of CSP method by example of East Siberia fields. CSP method makes it possible to map the heterogeneities of scattered waves field at greater depths. Integrated interpretation of reflected and scattered waves in complex geological section of the ancient platform gives good results due to using additional information, which is not normally taken into account.
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The Analysis of the Wave Field of the 3D Seismic, Tectonic Structure of the Basement and the Vasyugan Series of the Western Siberia
Authors A.V. Lyalin, I.N. Abdyrahmanova and F.S. SalimovSummaryThe aim and objective of this research was to A) study the seismological properties of the wave field in the range of reflections from the surface sediments of the basement and pre-Jurassic age sediments of the Vasyugan series of the upper Jurassic, B) study of the influence of geodynamic and disjunctive tectonic environments, predictable according to the interpretation of seismic data In) specification of the characteristics of faults, detection of fracture zones in rocks within the developed deposits. As a result, dynamic analysis, wave field, dedicated to the sediments of pre-Jurassic age - the Foundation is established, that the boundaries identified seismodynamics zones of pre-Jurassic complex are areas of “hard” tectonic setting is zones of increased fracturing (decompression, edge sections of the Horst-Graben) extending above the incision to the depth of the upper Jurassic sediments (zones of subvertical destruction). It is established that zones of increased fracturing of reservoirs reservoir UV1 are in direct relation with the tectonically “strained” areas in the Paleozoic basement, confined to the limits of the Horst - Graben. Identified areas of high fault tectonics and their influence on production rates of hydrocarbons and the ratio (%) water-oil in the formation fluid. Identification of seismic facies that are directly related to the geological forms of the Foundation and the Vasyugan series of the.
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Detailed Seismic Interpretation – Key to the Success of a Geological Modelling
Authors N.R. Tsyganova, I. Khromova and G. VasilevskayaSummaryThe case study shows successful application of methodological approaches for the geological modeling based on the seismic studies of a field located in the West Siberia. As a result, this workflow helped to develope an alternative model that is based on the litho-stratigraphic seal. Carefully traced and classified seismic anomalies that were detected on texture and amplitude features let us decrease uncertainties in reservoir characterization. Finalized geological model has been used as a basis to run reserves estimation.
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