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Facies analysis of marine Permian/Triassic boundary sections in Hungary 匈牙利海相二叠系/三叠系界线剖面相分析
Acta Geologica Hungarica Pub Date : 2004-12-01 DOI: 10.1556/AGEOL.47.2004.4.1
J. Haas, Kinga Hips, N. Zajzon, E. Tardi-Filácz, Pál Pelikán, A. Götz
{"title":"Facies analysis of marine Permian/Triassic boundary sections in Hungary","authors":"J. Haas, Kinga Hips, N. Zajzon, E. Tardi-Filácz, Pál Pelikán, A. Götz","doi":"10.1556/AGEOL.47.2004.4.1","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.4.1","url":null,"abstract":"The Permian/Triassic boundary was recognized in continuous marine successions in several outcrops in the Bukk Mts, North Hungary and in a few core sections in the northeastern part of the Transdanubian Range. In the Bukk Mts, of four studied boundary sections only two proved to be complete. They represent an outer ramp setting. In these sections the topmost Permian is made up of dark gray limestone, rich in fragments of crinoids, calcareous algae, mollusks, brachiopods, ostracods, and foraminifera. There is a dramatic decrease in the amount of the bioclasts in the last two limestone layers, which are overlain by a 1 m-thick shale bed. The lower two-thirds of this bed still contain Permian fauna but its upper part is almost free of bioclasts. The overlying platy limestone contains a pauperized fossil assemblage indicating stress conditions. The two core sections studied in the Transdanubian Range represent an inner ramp setting. The uppermost Permian is made up of lagoonal-sabkha cycles. It is overlain by ...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133474751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
The importance of remote sensing techniques in surface geologic mapping 遥感技术在地表地质填图中的重要性
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.3
Z. Unger, F. Síkhegyi
{"title":"The importance of remote sensing techniques in surface geologic mapping","authors":"Z. Unger, F. Síkhegyi","doi":"10.1556/AGEOL.47.2004.1.3","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.3","url":null,"abstract":"The role of remote sensing is well known and can be successfully applied as an initial step in surface geologic exploration. The aim of this study, by means of Landsat TM 7 image interpretation, is to assist photogeologic map compiling, which will serve as a core document for an upcoming field mapping exercise. The mathematical background and the wide variety of math-method possibilities offered by a satellite image interpretation software were used for this purpose. In this way the requested preliminary photogeologic map was compiled, based on the spectral properties of the surface geologic formations. Fortunately the areas of interest were in a desert area (Central Libya), so there was no limitation by vegetation coverage to hinder the application of spectral properties to geologic formations. After the geocoding of the images the display of different compositions of the Landsat TM 7 registration channels was begun. Contrast enhancement and histogram fitting were applied, and further operations to highl...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125596399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Application of medical Computer Tomograph measurements to 3D reservoir characterization 医学计算机层析成像测量在储层三维表征中的应用
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.5
T. Földes, G. Árgyelán, P. Bogner, I. Repa, B. Kiss, Kinga Hips
{"title":"Application of medical Computer Tomograph measurements to 3D reservoir characterization","authors":"T. Földes, G. Árgyelán, P. Bogner, I. Repa, B. Kiss, Kinga Hips","doi":"10.1556/AGEOL.47.2004.1.5","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.5","url":null,"abstract":"This paper summarizes the benefits of non-destructive core measurements by medical Computer Tomograph (CT) in integrated 3D reservoir characterization.  A direct relationship exists between CT measurements and petrography, conventional petrophysical analysis and well logs. Based on CT measurements the internal structure of core samples, and the geometry of framework constituents, porosity type and pore size distribution, as well as fracturing, can be described. There is a close connection between distribution of the Hounsfield Unit of CT measurements and pore size distribution detected by conventional petrophysical analysis. Calculation of effective porosity from petroleum saturation experiments provides a new way to determine the porosity of the whole core sample. Beside the description of reservoir parameters, the results of CT measurements can be extended over the surrounding area of the well. By matching the cylinder maps of CT to FMI images and other well logs the original position of the core sample...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133804122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Uncertainty investigation of the semivariogram by means of the bootstrap method 用自举法研究半变异函数的不确定性
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.7
Z. Sebestyén
{"title":"Uncertainty investigation of the semivariogram by means of the bootstrap method","authors":"Z. Sebestyén","doi":"10.1556/AGEOL.47.2004.1.7","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.7","url":null,"abstract":"The uncertainty in the semivariogram has hardly been investigated in previous geostatistical studies. This paper presents an efficient methodology of uncertainty assessment based on the bootstrap. By applying this computer-intensive statistical method one can easily simulate the distribution of the empirical semivariogram estimate for each lag. The lag-wise standard errors and confidence intervals of a given level can then be easily calculated from the bootstrap replicates. These estimations are valid in any situation when classical statistics fail. The bootstrap also provides a mathematical-statistical tool to decide whether the semivariogram reaches its maximum at a given lag or not. It leads directly to a simple determination of the range of influence. Effects beyond the range, such as the hole effect, can be explored with the same approach. The empirical semivariogram, supplied by measures of uncertainty, adequately describes the true spatial behavior of the studied variable. This universal method ren...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134474767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Seismic data integration in geostatistical reservoir modeling 地质统计油藏建模中的地震数据集成
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.6
Péter Zahuczki
{"title":"Seismic data integration in geostatistical reservoir modeling","authors":"Péter Zahuczki","doi":"10.1556/AGEOL.47.2004.1.6","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.6","url":null,"abstract":"Seismic data integration in reservoir modeling workflows is the one of the fastest-growing fields in the Earth Sciences. The actual geostatistical methods (co-kriging, stochastic simulation) can use seismic data as a secondary variable if there is a well-determined linear correlation between well log data and seismic attribute. Seismic interpreters must often increase this correlation. The application of multi-attributes via neural network may help in this case. A neural network type, called multi-layer perceptron, and its application in 3D porosity distribution prediction in a Hungarian natural gas reservoir, are described in this paper.","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127898272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Conceptual fracture network model of the crystalline basement of the Szeghalom Dome (Pannonian Basin, SE Hungary) Szeghalom Dome (Pannonian Basin, SE hungarian)结晶基底裂缝网络概念模型
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.2
T. Tóth, E. Szűcs, F. Schubert, C. Hollós
{"title":"Conceptual fracture network model of the crystalline basement of the Szeghalom Dome (Pannonian Basin, SE Hungary)","authors":"T. Tóth, E. Szűcs, F. Schubert, C. Hollós","doi":"10.1556/AGEOL.47.2004.1.2","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.2","url":null,"abstract":"Fractured fluid reservoirs are of key importance for recovering water and hydrocarbon supplies and geothermal energy, or in predicting the subsurface flow of pollutants. There are several fractured metamorphic-basement HC reservoirs in the Pannonian Basin; one of the largest among them is the Szeghalom Dome in SE Hungary. Previous production and fluid inclusion data infer that in this case several unconnected fluid regimes must coexist in the basement, making modeling of the fracture network essential. Because the representative volume of a fractured rock mass is usually too large to measure hydraulic properties directly, stochastic calculations should be carried out, which are consistent with observed deformation history and stochastic patterns. Input statistical data (orientation, length, distribution, fractal dimension for fracture seeds) were determined for amphibolite and gneiss samples representing the Szeghalom Dome. Data were measured simultaneously using binocular microscope and computerized X-ra...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126538157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Dynamic factor analysis for quantifying aquifer vulnerability 含水层脆弱性量化的动态因子分析
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.1
J. Kovács, L. Márkus, Gábor Halupka
{"title":"Dynamic factor analysis for quantifying aquifer vulnerability","authors":"J. Kovács, L. Márkus, Gábor Halupka","doi":"10.1556/AGEOL.47.2004.1.1","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.1","url":null,"abstract":"The fluctuation of underground karstwater levels constitutes an inherently random, very complex time-dependent phenomenon further complicated when human interference disturbs the natural course. However, its structure can be explored by identifying only a few latent effects or factors (usually of significantly simpler dynamic structure), that are the driving forces behind it. The correct statistical tool to determine latent effects from the temporally interdependent observations is dynamic factor analysis (DFA). Analogously to ordinary factor analysis, DFA also determines loadings representing the measure of intensity of the latent effect corresponding to the factor. The obtained factor-intensities provide essential information on the geologic environment, improving the chance of correct decisions when environmental issues are on the agenda. In the given case the factors correspond to the infiltration and water extraction; hence, the intensities appear to be connected to aquifer vulnerability. Intensive w...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125946549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
The influence of lower-boundary condition on the groundwater flow system 下边界条件对地下水流系统的影响
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.8
J. Szanyi
{"title":"The influence of lower-boundary condition on the groundwater flow system","authors":"J. Szanyi","doi":"10.1556/AGEOL.47.2004.1.8","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.8","url":null,"abstract":"Modeling is essential for the investigation of material-energy transport processes below the surface. During the construction of groundwater flow models hydraulic conditions are usually not considered below the investigated space. The boundary conditions are mostly fixed at the border; i.e. there is no flow across the boundary. However, this condition is not tenable in every case, so its practical applications may lead to false conclusions. The present paper shows how the flow geometry changes with the modification of the lower-boundary condition and fault zone conductivity in a study area near Debrecen, NE Hungary.","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114786981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heterogeneity analysis of clastic sediments by computerized X-ray tomographs 计算机x射线层析成像碎屑沉积物的非均质性分析
Acta Geologica Hungarica Pub Date : 2004-06-01 DOI: 10.1556/AGEOL.47.2004.1.4
Zoltán Hunyadfalvi
{"title":"Heterogeneity analysis of clastic sediments by computerized X-ray tomographs","authors":"Zoltán Hunyadfalvi","doi":"10.1556/AGEOL.47.2004.1.4","DOIUrl":"https://doi.org/10.1556/AGEOL.47.2004.1.4","url":null,"abstract":"The CT technique is unique because it provides a non-destructive evaluation of sedimentary rocks. The absorption of X-radiation, emitted by a high-voltage generator, depends on the bulk density and atomic weight of the substance. The lower the density of the material, the more transparent it is to X-rays. If the emitted energy is constant, the absorption depends only on the density of the substance, which is represented by different Hounsfield Units. In case study No. 1, a pelitic core sample of an ox-bow lake environment was analyzed. The mathematical-statistical estimates and significant time-series model (ARIMA) proved that the data coming from the CT images show the presence of micro-cycles. The applied method proved the influence of seasonal floods on local sedimentation. In case study No. 2, the data represent a younger and an older Bouma sequence. The macroscopic study suggests that there are two C units in the core, because an erosional surface is clearly identifiable between the older and the you...","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131757472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
New chronological and malacological data from the Quaternary of the Sárrét area, Transdanubia, Hungary 匈牙利外多瑙河Sárrét地区第四纪的新年代学和线虫学资料
Acta Geologica Hungarica Pub Date : 2003-12-01 DOI: 10.1556/AGEOL.46.2003.4.3
P. Sümegi
{"title":"New chronological and malacological data from the Quaternary of the Sárrét area, Transdanubia, Hungary","authors":"P. Sümegi","doi":"10.1556/AGEOL.46.2003.4.3","DOIUrl":"https://doi.org/10.1556/AGEOL.46.2003.4.3","url":null,"abstract":"Quaternary geology, Quaternary malacology, radiocarbon data, Holocene, Pleistocene, paleoecology, stratigraphy, Transdanubia, Hungary","PeriodicalId":107929,"journal":{"name":"Acta Geologica Hungarica","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121840337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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