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6th EAGE Saint Petersburg International Conference and Exhibition
- Conference date: April 7-10, 2014
- Location: Saint Petersburg, Russia
- Published: 07 April 2014
161 - 174 of 174 results
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Research of Multiscale Landscapes Structure by GPR
By V.V. SysuevSummaryGPR method used for the study of subsurface structural boundaries in landscapes of the marginal zone of the Valdai glaciation and landscapes of secondary moraine plains of Smolensk-Moscow hills. Change of parameters of GPR sounding give the possibility to study the hierarchy of structures in the landscape. Continuous scanning of the spatial three-dimensional structure of soils and sediments resulted in the identification and bind in GIS palaeo-frost cracks in cover loam and buried fluvioglacial deposits in gullies flow of glacial meltwater. Once again the method of subsurface sounding GPR method convincingly demonstrated that the geological and geomorphological basis plays a leading role in the differentiation of the structural units of landscapes and types of vegetation conditions
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Sedimentation Model and Oil-and-gas Content Prospects of Nepskiy Horizon of Katanskaya Saddle
More LessSummaryProspects of discovery of Nepskiy horizon new oil and gas accumulations within Katangskaya saddle are connected with searching non-anticlinal traps. In view of the very uneven study of Katangskaya saddle by the deep boring detecting non-anticlinal objects is based on creating a typical sedimentation model of Nepskiy horizon according to the data of the wells and its transferring to the insufficiently explored by well boring areas. As the result there has been revealed a sequence of sedimentation zones bottom-up along the geological section and from the crest of Baykitskaya and Nepsko-Botuobinskaya anticlises to the slopes of Katangskaya saddle: from continental alluvial deposits, including riverbed and interstream areas (productive strata ВнVI-ВнV), to deltaic, including lagoon deposition, delta platforms and front bars (productive strata ВнIV), delta front fans (all productive strata) and shallow marine deposits (productive strata ВнII and ВнI). According to the detecting zoning in different reservoirs of Nepskiy horizon next types of traps can be predicted: lithological of riverbed type, structurally lithological of bar type, lithological and structurally lithological of delta front fans, structurally lithological of regional replacement and thinning of strata ВнII.
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Geologic and Geophysical Justification of the Prospecting and Exploration Trend within the Northern Regions of West Siberia
Authors V.N. Borodkin, A.R. Kurchikov, A.S. Nedosekin and M.V. KomgortSummaryThe article presents the methodological approaches to justification of the prospecting and exploration trend within the northern regions of Western Siberia and inside the boundaries of each of the three zones
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Amplitude-frequency Processing and Geotectonic Interpretation of the Earth’s Crust Seismic Sections of the Aldan Shield
Authors E.Y. Goshco, A.S. Salnikov and A.S. EfimovSummaryEvery small area of the composite heterogeneous Earth’s crust produces reflected, scattered and diffracted waves. They interfere among themselves many times and in the way unknown for us forming dissimilar local wavelets which are already impossible to be divided by wave types, as it is conventional in the standard processing.
The main objects of the custom processing of a seismic section are local interference wavelets and their amplitude-frequency attributes. Amplitude-frequency attributes of interference wavelets depend on local geometric and physical properties of a medium and change subsequent to the medium.
In interpreting results of seismic investigations of the Earth’s crust we used basic amplitude-frequency attributes of the wavelet matrix: Generating capacity of a wavelet pointing to the acoustic impedance of a medium; Basic frequency of a wavelet dependent on the average scale of geological heterogeneities; Highfrequency energy in wavelet spectra being an index of medium absorption properties.
While developing the 3-ДВ reference line we accumulated wealthy real material making it possible to draw definite conclusions regarding the depth pressure distribution, crust permeability, presence of fluidconducting structures of the Aldan shield. These are the main conditions in the geodynamic process of formation and distribution of mineral deposits in the Earth’s crust.
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Tectonophysical Analysis of the Seismic Reflections Surface Morphostructure As a Requisite to Increase Interpretation Adequacy
More LessSummaryThe research of tectonophysical approach for to morphostructure seismic reflections surface of West Siberia syneclise analysis for prognosis fractures considered
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Architecture and Distribution Analysis of the Lower Cretaceous Clinoforms in the Western Barents Sea
Authors D.L. Marin and A. EscalonaSummaryIn this study we provide a detailed description of the geometry, seismic facies and trajectory analysis of the clinoforms of the western Barents Sea, in order to predict the distribution of best reservoir facies. Preliminary analysis of clinoform distribution, architecture and trajectory analysis reveal four different directions of progradation of clinoforms. Those different directions indicate four different sources of sediments for the Lower Cretaceous which includes: The Fedinsky high and Nordkapp basin to the noreast and east, the Loppa high to the north of the Hammerfest basin, and north of the Loppa High in the direction of Svalbard. The clinoforms can be described as oblique-tangential to sigmoidal-oblique, with a flat to slightly ascending trajectories, ascending and descending trajectories. The clinoforms show both small and wide bottomsets. Flat to descending trajectories suggest high sediment supply to deep waters.
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Lithological and Mineralogical Characteristics of Deposits PS as a Basis for Modeling
Authors U.G. Vahabov and M.A. AfandiyevaSummaryLithological composition of PS the primary reservoir of Azerbaijan is represented by a thick series of interstratified sand band, clays and conglomerates with significant fluctuations of their mineralogical composition.
As a result of studies there was collected and analyzed a significant by its volume primary material including a large number of literary sources.
It was observed, that at certain stages of their development there occurred some periodic changes of mineral composition and hence the role of individual source lands in the supply of sedimentation basin by terrigenous material. So during the formation of sand band the formation of section occurred at the expense of in wash of sandy material by waters of paleo-rivers deltas whereas accumulation of clayey layers occurred at the expense of their drift from Greater and |Lesser Caucasus areas.
Proper understanding of conditions where PS deposits accumulation occurred will be the base for reliable modeling of paleobasin of PS at different stages of its development.
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The Depositional Environment and Petrography of Aghajari Formation in Bandar Abbas Area, Zagros Basin
More LessSummaryAbstract:
The Aghajari Formation (Miocene- Pliocene) is the last member of Fars Group in the Zagros Basin. A section of this formation in Suro Anticline, west of Bandar Abbas with 310 m thickness was selected for this study. Petrography analysis leads to define 4 lithofacies which deposited in estuarine environment. Lithological studies indicated this formation is made up of marl intercalated with sandstone, siltstone and silty mudstone with variable extention. The marl facies is interpreted to be deposited on a low relief, low energy, tidal flat or marsh to flood plain environments probably influenced by both fluvial and marine processes whereas the marl interpreted as adjacent flood pain deposits, which is also consistent with gypsum fibrous and sheets. The siltstone to fine sandstone lithofacies association is interpreted to be formed by estuarine sand bars which developing on an estuarine influenced mainly by marine (tidal currents) processes. Sandstone bodies are interpreted to represent beach barrier or shore face sand and limestone possibly deposited in a lagoon setting.
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New Possibilities for the Prediction of Geological Section Using Seismic Data
Authors E.A. Kopilevich, M.L. Afanasyev, N.D. Surova and R.V. VotyakovSummaryPrediction of geological section in the interwell space by seismic data is to determine the geological section types. To predict the types of geological and reservoir section properties the authors apply the Technology of Spectral-Velocity Prediction (SVP-technology).
SVP-technology has tested in various seismic and geological conditions of carbonate and clastic section on the fields Timan-Pechora, Western Siberia, north-east of the Siberian platform, the North Caucasus and the Black Sea oil and gas basins.
At present, the authors used the SVP-technology for typification of the geological section and prediction of oil and gas potential using regional seismic profiles. The information obtained has allowed to build a new geological model to identify new promising objects.
SVP- technology can be successfully applied at the regional stage of exploration works to refine the geological structure and to select new oil and gas promising facilities.
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About Metallogenic Zoning of Geological Structures of the Great Altai
Authors B. Dyachkov, M. Omirserikov and N. ZimanovskayaSummaryIn the paper the features of the formation and metallogeny of the geological structures of Great Altai (Rudny Altai, Kalba-Narym, Western Kalba and Jarma-Saur) which are included into the system of the Central Asian mobile belt are considered.Great Altai - the most important center of the color and the gold mining industry of Kazakhstan. It concentrated large deposits of copper, lead, zinc, there are deposits of rare metals and other minerals. However, to date the fund is easily discovered deposits is almost exhausted, the remaining reserves in the interior will be enough for the first ten years. Development of new prognostic and search technologies based on modern geological and geodynamic concepts of ore formation, leading ore petrological, geophysical, and mineralogical and geochemical estimation criteria, using high-precise analytical base. Conducted metallogenic studies have shown that there are perspectives in the region to strengthen the mineral resource base.
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Analyzing the Structure of Multiscale Heterogeneity Hydrogeochemical Fields of Western Siberia
Authors A.R. Kurchikov, A.G. Plavnik and D.A. KurchikovSummaryConsidered features of exploration and commercial development of the West Siberian basin. Substantiates increasing relevance of the development and implementation of methods for analyzing chemistry data in conjunction with detailed data on the structure and properties of the deposits, which include the widest possible range of geological data - geophysical, geodynamic, geochemical, lithological and many others. The results indicate the reliability of the developed methods of analysis data on multi-scale research facilities, providing highly detailed and effective construction of the solution of theoretical and applied problems of hydrogeology in Western Siberia
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The Capabilities of Modern Airborne Geophysical Techniques in Evaluating the Petroleum Prospectivity in the Early Stages of the Study
Authors P.S. Babayants and A.A. TrusovSummaryThe presentation demonstrates the possibility of complex airborne geophysical surveys in the study of the geological structure of the crystalline basement and sedimentary cover petroleum-bearing basins.
The obtained results make it possible optimize the exploration using seismic surveys and drilling methods, and also increase reliability of the interpretation of seismic data
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Optimization of Well Locations Using Geochemical Survey Data
Authors V. Kolesnik and M. ZavatskiySummaryNowadays the most essential problem of developing oil and gas fields in Western Siberia is increasing the coefficient of oil recovery. This problem can be solved by optimizing the location of output and injection wells according to the maximum number of geological factors.
The long-term experience has shown that in all oil and gas fields, including near-surface zones, there are anomalies in the composition and properties of the zone, confidently mapped by the highest migration components of the reservoir.
The methodology of the survey is follow: sample drawing of snow by regular grid on the area; chromatographic analysis in which we define content of methane in samples and methane homologues to hexane; the mathematical data processing and mapping of geochemical fields.
As a result, we can identify productive and non-productive zones (windows with low and high concentration of gases. In this situation we offer to plan injection wells into "windows with high conductivity", which is a direct channel between the deposit and the surface. In these zones the layerhas a good injectability and connection with productive formation area. In areas with low concentration of gases characterized by good seal,it needs to planproduction wells
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On the Resolution Limits in the Near Surface Traveltime Tomography Studies
Authors M.A. Shishkina, I.V. Fokin, S.S. Akopova and S.A. TikhotskiySummaryThe problem of the adequate resolution estimation and treatment in near-surface traveltime seismic tomography applications is addressed. The problem of the “physical” resolution limit (i.e. that defined by the finite wavelength) is examined by means of the synthetic tests where the forward problem is treated as a full-waveform modelling and subsequent picking of the synthetic traces. Inverse problem is solved by the iterative non-linear traveltime inversion. Particularly the case of the thin-layered media with the superimposed local velocity anomalies is considered. Issues of the “mathematical” resolution, i.e. that defined by the inherent properties of the tomography inverse problem are also investigated.
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