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12th EAGE International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: 13 May 2013 - 16 May 2013
- Location: Kiev, Ukraine
- ISBN: 978-94-6282-073-9
- Published: 13 May 2013
101 - 113 of 113 results
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Monitoring changes in agricultural landscapes of Central Europe, Hungary: application of ILWIS GIS for image processing
By P. LemenkovaThe research aim is application of GIS and spatial analysis of satellite images for agricultural mapping. The study area is located in Mecsek Hills, Hungary. These landscapes represent unique part of Hungarian environment in the Carpathian Basin. Diverse landscape structure with complex biogeographic composition characterizes this region. However, this region is intensely used in agriculture, which causes high land heterogeneity. The research method consists in using ILWIS GIS and Landsat TM satellite imagery (1992, 1999 and 2006). The methodology includes clustering, spatial analysis, interpretation and classification. Clustering algorithm is based on the analysis of the similarity of the spectral signatures of pixels, and grouping pixels into thematic categories of classes of the land cover types in study area. This paper contributes to the development of the agricultural monitoring in region of central Europe. The distribution of the landscapes in the Mecsek Hills area was analyzed. Land cover types were interpreted by association of pixels on the image to different thematic classes: vegetation, categories of agricultural land and other areas (in total, 12 classes). The results consists in thematic land cover maps of the study area in 1992, 1999, 2006 showing landscape dynamics.
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2G Reference Data Management
Authors A. Terentyev and S. FokinThis paper gives brief overview of TOTAL's approach to 2G data management and describes an in-house solution developed to cover the needs of specialists.
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PTS rescaling in VTI media
More LessThe number of grids in a velocity model defined for transversely isotropic media with vertical symmetry axis is the crucial parameter in modelling and processing of seismic data. We propose a method to reduce the number of grids both along the symmetry axis and within the symmetry plane direction. The method is based on the preserve-traveltime smoothing technique.
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Discrimination of copper mineralized zone of part of sultanate of Oman using remote sensing technique
Authors S. Rajendran, A. Majed Said AL-Dhuhli and H. Hazaa Saif Al-AliEconomically viable copper deposits occurrence are widespread in the ultramafic rocks of Semail ophiolite massifs of the northern Oman Mountains, particularly in the basaltic and pillow lava units of the mantle section. The present study discriminates the occurrence of copper bearing mineralized zone within ophiolite sequence of parts of Wadi Al-Jizzi, Sultanate of Oman using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite data. Digital image processing methods namely band rationing and spectral unmixing applied on the ASTER VNIR and SWIR spectral wavelength regions were showed promising results in detecting the zone of potential copper bearing mineralization within the middle extrusives consist the basaltic to andesitic pillow and massive lava and the lower extrusives have basaltic pillow and massive basalt in the ophiolite sequences. The interpreted images are verified in the field and through laboratory studies. The study recommends the technique as time and cost-effective and has potential for targeting mineralized zone in similar region elsewhere in the world.
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Variation in catagenesis level and hydrocarbon generation in sedimentary rocks of the South Sumatra Basin, Indonesia
More LessGALO system for basin modeling is utilized to restore numerically burial and thermal histories of Limau Graben in South Sumatra Basin from Oligocene to present time. Thermal and maturation history of Basin was considered on an example numerical reconstructions for sedimentary sections of six wells (Pandan-81, Petanang-1, Tepus-2, Tepus-1, Gambir-1 and Lembak-8) located along the profile crossing Limau Graben. Variations in tectonic subsidence suggest period of lithosphere extension in Oligocene and Miocene with amplitude increased from β = 1.12 at the flanks of the Limau Graben (well Lembak-8) to 1.32 in its centre (wells Tepus-1 and 2). The modeling shows that the Lemat source rocks are oil generating in the main part of Limau Graben. The rocks at the base and roof of the Talangakar formation can be considered as intensive oil generating excluding, may be, upper horizons of the formation in the must shallow areas of the Graben (w. Lembak-8). A peak of oil generation by the formation rocks occurred in the last 5 – 10 My. Oil generation by the rocks of the Gumai formation can be significant in the main part of the Graben. It is negligible only in fare flanks of the Graben (w. Lembak-8).
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An Efficient workflow using Petrel and Techlog software for Unconventional Reservoirs
Authors M. Mastrolorenzo and S. KumarIntegrated and multidisciplinary workflows are the key to deal with the challenges associated with unconventional reservoirs potential being exploited today. The software platform should able to effectively manage all relevant data, help to optimize the reservoir behavior and narrow down the associated uncertainties. This study captures the details of a workflow with the goal of integrating the 3D Petrel seismic to simulation software together with the Techlog wellbore software. This workflow is paramount to better delineate the potential of unconventional reservoirs and their genesis. How this workflow can contribute best to the integration of these two integrated approaches? Petrophysical properties have been generated with the proper understanding of the multi-mineral composition of the rock to identify the largest production intervals using Techlog software. Exploitation of unconventional low-permeability reservoirs depends definitely on detailed well to well correlations and meticulous, comprehensive formation evaluation. Subsequently, a 3D Geological static structural model has been created with Petrel, which needs to be populated, stochastically or deterministically, by using the petrophysical properties. The combined output of these analyses will be used within the 3D structural grid to identify high potential TOC zones and their distribution.
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Capacity building project of geo-information management infrastructure in the geological sector of Ukraine
Authors J. Lohva, J. Kokkonen, J. Multala and O. RantalaA co-operation project on "Capacity Building for Development of European-type Geo-information Management Infrastructure in the Geological Sector of Ukraine" is implemented by the Geological Survey of Finland together with the State Geological and Subsurface Survey of Ukraine and the Ukrainian State Geological Research Institute. The project is funded by the Ministry for Foreign Affairs of Finland. The project started in 2011 and will be completed by the end of 2013. The overall objective of the project is to enhance accessibility of geo-information in Ukraine by setting up web-portal (in Ukrainian and English languages) based on the open data. Several type of geological information can be easily accessed through the portal by wide range of users. The main concept for the institutional capacity building in creating new type information management and digital processing of spatial data using GIS software is based on on-the-job training. The transfer of know-how is implemented by a number of partner organisation experts working together for variable periods of time both in Finland and in Ukraine. This way of implementation is believed to produce sustainable growth and skills for further development of systems.
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Перспективы поиска залежей нефти в додевонских комплексах Калтасинского авлакогена
Authors E.A. Шмонова and К.Д. БудкинВ работе рассмотрены рифейский и вендский нефтегазоносные комплексы, главным образом, Удмуртии. Рифейский терригенно-карбонатный комплекс Волго-Уральского бассейна признается потенциально нефтегазоносным. Наиболее полно он вскрыт на востоке Удмуртии в местах максимального погружения фундамента. Наилучшими коллекторскими свойствами обладают породы прикамской подсерии нижнего рифея. Она вскрыта в западной прибортовой и бортовой частях Калтасинского палеорифта и на некоторых выступах в его внутренней зоне. Главной нефтегазогенерирующей толщей додевонского чехла признается калтасинская свита, отличающаяся повышенным содержанием Согр и повышенной битуминозностью. К основным типам ловушек рифея относятся антиклинальные, связанные с движением блоков фундамента по разломам, а также тектонически и литологически экранированные. Природа флюидоупоров для рифейских коллекторов пока еще недостаточно ясна. Рифейский комплекс вкрыт лишь несколькими скважинами и изучен очень слабо. Вендский нефтегазоносный комплекс изучен гораздо лучше. На сегодняшний момент уже открыто несколько месторождений нефти в вендских отложениях, а также отмечен ряд нефтепроявлений. Коллекторские свойства пластов достаточно высокие. Существует и ряд проблем, в числе которых сложное строение залежей нефти и физико-химические свойства нефти, затрудняющие решение поисково-разведочных задач. Таким образом, додевонские отложения Волго-Уральского бассейна представляют собой интерес как недостаточно разведанные, но перспективные объекты на выявление залежей нефти и газа. А поскольку запасы углеводородов в палеозойских комплексах не бесконечны, актуальны поиски и разведка новых залежей в рифейско-вендских отложениях.
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Exploiting the information on airborne imaging spectroscopy data – practical aspects to enhance the potentiality
Authors M. Pregesbauer, R.F.M. Michel and A.M. AltenbergerA brief overview on a processing workflow for airborne imaging spectroscopy data shows the advantages in processing and classifying data on a raw geometry level. When dealing with enormous large scale high resolution data sets, special attention shall be paid on performance issues as well as spectral accuracy.
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On Heterogeneous, Multidimensional Unconventional Reservoir Ecosystems
Authors S.L. Nimmagadda, H.V. Dreher, A. Noventianto, A. Mustoffa and H. ParapatyWorldwide conventional resources are on declining trend. Alternate resources are unconventional sources. Volume of datasets exists in unconventional resources, but they are neither evaluated nor unknown. They are even unaccounted for during drilling campaigns and evaluations. Because of exploration and development setbacks, productibility, recovery costs and environmental concerns, exploitation of unconventional resources is held up on global market. In order to address these issues, authors propose, multidimensional and heterogeneous, data warehousing and mining approach, supported by ontology. Data integration and exploring multiple connections among attributes of multiple dimensions of unconventional petroleum ecosystems (of different geographic, geological and production regimes) are needed. Authors attempt to make use of ontologies, written for multiple dimensions including periodically (longitudinal dimension) and geographically (distantly, lateral dimension) varying dimensions, within an unconventional resource basin. The proposed methodology is robust and can resolve issues associated with organization of unconventional resources and extend help to technology adaptation. The proposed methodology can be applied in any basin for all unconventional reservoir ecosystems worldwide.
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Алгоритм классификации данных с малой апертурой из массива "Miknevo"
Authors I.A. Sanina and K.S. TkhakFor preserving the environment, human health, protection of natural reserves, located in the territories adjacent to the mining companies, it is required a comprehensive study of the response the geological environment on the man-made impact. Last years, despite the the aseismicity of the East European platform, a series of earthquakes with magnitudes from 2 to 4.5 were registered. However, most of them are known as mine explosions. It is interesting to review the data for a few years and propose a method of sorting all events to the class group «known» and «unknown» seismic events. This publication describes a method for detection of explosive seismicity on the record for the small-aperture seismic array «Mikhnevo» and the definition of reliable criteria for the identification of events to create a database of images of man-caused events. It is described some of the features of seismic records from the mine explosions.
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Невидимый горизонт
Authors И.В. Тычинкина, Н.С. Логинова and T.A. ЦымбалюкОсновные моменты: сложность выделения горизонта Ю1 на сейсмических разрезах; анализ существующих методов расчленения разреза; комплексный подход к решению задачи. Важный аспект: только после всестороннего анализа динамических особенностей сейсмической записи, реконструкции условий формирования можно прогнозировать коллекторские свойства и характер насыщения пласта Ю1.
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Maximum Likelihood & Multiple Imputation of Incomplete Static and Dynamic Reservoir Data
More LessThe problem of incomplete data is a crucial issue that should be handled efficiently for accurate evaluation and prediction in a reservoir characterization. Maximum likelihood method has been adopted to handle the incomplete data in well logs and core measurements in addition to production and injection rates of ten wells in a heterogeneous reservoir in an Iraqi oil field. Expectation Maximization algorithm (EM) is the concept of ML imputation and it starts with some initial values for the mean and the covariance matrix and iterates through imputing missing values (imputation step) and re-estimating the mean and the covariance matrix from the complete data set (estimation step). The iteration process ends when the maximum relative difference in all of the estimated means, variances between two iterations is less than or equal to a given value. Furthermore, multi-regression linear models have been set for the log porosity as a response and function of all other factors including Vsh, Gamma ray, formation density, and resistivity. Then, the core porosity has been estimated for all intervals as a function of log porosity in order to estimate the corrected permeability. These linear models have performed good quality of test indicators especially p-value, adjusted-R, and F-ANOVA.
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