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11th EAGE International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: 14 May 2012 - 17 May 2012
- Location: Kiev, Ukraine
- ISBN: 978-94-6282-075-3
- Published: 14 May 2012
121 - 129 of 129 results
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Геофизические идеи по поводу активного тектонического контакта разлома Peceneaga - Camena
Authors L. Besutiu, M. Orlyuk, L. Zlagnean, L. Atanasiu and A. RomenetsThe paper mainly deals with results of the research project INRAF, a joint venture of the Institute of Geodynamics of the Romanian Academy (IGAR) and Institute of Geophysics of the National Academy of Sciences of Ukraine (IG‐NASU) dedicated to the study of some active faults located in the Black Sea NW inland. Starting from a large geological and geological database additional field observations were conducted within the Peceneaga‐Camena Fault (PCF) segment where a geodynamic observatory run by IGAR is located. Based on the magnetic properties contrast between the PCF flanks, high accuracy ground geomagnetic investigations were successfully conducted for revealing the path and in‐depth structure within the fault segment where the Baspunar Geodynamic Permanent Station monitor slip along the fault. 2D modeling was used to construct tentativeinterpretative models of the fault. The lack of magnetic properties along PCF path has been interpreted in geodynamic terms. Therefore, indirect evidence on the PCF active nature is provided, in full agreement with geodesy and geochemistry observations.
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Подавление шума многокомпонентных сейсмических данных с использованием FX домена SVD
Authors HadiAzizpour Lindi, F. Bayati, H. Siahkoohi, F. Bayati and H. Siahkoohiral covariance matrix of seismic wavefield data in F‐x domain is formed and in order to avoid dealing with very large matrixes, the reduced dimensional spectral covariance matrix is estimated by means of singular value decomposition (SVD). By finding the highest eigenvalue of the reduced dimensional covariance matrix we are able to separate the desired seismic waves from the noise. The results have shown that the proposed algorithm outperforms the conventional separation technique in terms of accuracy and complexity.
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Определение мощности палеозойских отложений над импактным кратером Ritland по магнитным свойствам горных пород
By C. B. BeyerA palaeomagnetic analysis of the Ritland impact structure in Ryfylke, Norway, was carried out with the purpose to date the impact. The palaeomagnetic dating was problematic, because the apparent polar wander curve for the Ediacaran and Cambrian is fragmented and some of the analysed rocks carried no detectable primary magnetisation. The analysis, however, showed a well defined secondary component which was present in all rocks investigated. This secondary magnetic component is interpreted as a partial thermal remanent magnetisation. It has a direction indicating that it was imposed during the early Permian. Because there are no magmatic rocks of that age in the area, the remagnetisation is interpreted as having been caused by elevated temperatures due to burial. The magnetisation temperature can be estimated from the Neel equation describing the relation between magnetisation temperature and time and demagnetisation temperature and time. Using this equation a magnetisation temperature of 150ºC is estimated if the magnetisation of the rocks occurred during 10 million years. A magnetisation temperature of 150ºC corresponds to a burial depth of 4‐5 km if a palaeogeothermal gradient of 25‐30ºC is assumed.
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Программное обеспечение для построения 3D- плотностных моделей с использованием 2D сейсмических данных
More Less2D data is widespread in geophysics ‐ for example, seismic DSS profiles data can not be multidimensional in essence. Author developed software that helps to create 3D models based on such 2D data. Main idea was to help user to automate rut procedures. Many popular file formats was used for import and export so programs can be used in combination with other software.
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Применение искусственных нейронных сетей к скважинным данным для картирования литофаций плиоцена, плейстоцена и голоцена
Authors M. Cvetkovic, J. Velic and T. MalvicSuccessful artificial neural network analyses of the lithology data – prediction of either sandstones or shale were obtained. These were performed in the youngest (Pliocene, Pleistocene and Holocene) sediments in Sava Depression, Croatian part of the Pannonian Basin, and the input data was based on well log curves (spontaneous potential, shallow and deep resistivity curves). These analyses were successfully preformed in 20 wells of which in two, the training and validation of the networks was made. Such obtained lithology data was used for the construction of lithofacies maps which clearly show the distribution of the overall thickness of sandstone bodies and their number. Palaeotransport directions and areas with thicker sandstone interval for possible gas accumulations can also be observed in the constructed maps. The main influx of sediment was from the NE trough a channel which coincides with recent structural low defined by the absence of Pliocene outcrops while the thickest sandstone intervals can be delimited to the SW part of the mapping area.
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Пути повышения информативности гравиметрических данных
Authors С. Г. Бычков and А. А. СимановПоказано, что возможности гравиразведки на современном этапе вступают в противоречие с существующими инструктивными требованиями к ее проведению. Предлагается использование новых стандартов редуцирования гравиметрических данных. На конкретном примере обработки данных гравиметрической съемки в горной местности показано, что применение современных процедур обработки позволяет повысить информативность гравиметрических данных и эффективность их использования при поисках и разведке месторождений полезных ископаемых.
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Построение трехмерных физико-геологических моделей залежей углеводородов с использованием геоинформационных технологий
More LessРассмотрена возможность применения геоинформационной системы ArcGIS 9.3 с дополнительным модулем Target для трехмерного моделирования залежей углеводородов. На примере Шершневского месторождения нефти, расположенного на территории Пермского края, показана перспективность применения данной технологии геологического моделирования 3D на стадии предварительной оценки запасов углеводородов.
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Углеводородные ресурсы и геостатистика месторождения TAGI (HASSI BERKINE SOUTH, ALGERIA)
Authors H. Mezghache and M. HaciniThe hydrocarbon reservoir of lower triasic of Hassi Berkine (TAGI‐HBNS) belongs to the oil province of Algerian Sahara. The principal petrophysical parameters were measured by logging on intervals of 0.15 m. of whole. It was explored by 61 wells drilled by Sonatrach/Anadarko. Tests performed at the well, prior to field production of HBNS, have observed pressure responses between wells over distances of 10km. This fact demonstrates good lateral continuity of the reservoir layer and stationarity of petrophysical parameters. This stationarity allows the geostatistical modeling of petrophysical parameters and estimation of hydrocarbon resources using ordinary kriging. A Principal Component Analysis (PCA) was performed on mean values of petrophysical parameters in the layer. The results of PCA have identified the principal associations. Sometimes the zones of favorable facies can be saturated with water. For the reasons cited above, the ordinary kriging is used for modeling and estimate of hydrocarbon volume per unit area. This volume is expressed by the regionalised variable ‐ product “PHIE.SH.H”, where H is the thickness of layer. This approch has made possible to eliminate the zones which are saturated in water, the estimation of hydrocarbon resources in blocks of one km2 surface, calculate and mapping their variances.
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Построение сейсмоплотных моделей верхней части литосферы "сеточными" методами
Authors П. С. Мартышко, И. В. Ладовский, В. В. Колмогорова and А. Г. ЦидаевВ статье представлен оригинальный математический алгоритм для совместной интерпретации сейсмических и гравитационных данных. Использование сеточных функций существенно облегчает процесс построения трёхмерных плотностных моделей. Результаты интерпретации сейсмических данных используются для построения модели начального приближения. Приведены результаты интерпретации данных на Северном Урале и Тимано-Печерской плите. Работа выполнена в рамках проекта фундаментальных исследований УрО РАН.
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