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4th Congress of the Balkan Geophysical Society
- Conference date: 09 Oct 2005 - 12 Oct 2005
- Location: Bucharest, Romania
- Published: 09 October 2005
21 - 40 of 198 results
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Multibeam Backscatter Seabed Classification
Authors X. Monteys and D. InamdarGLOBAL CHANGES & MARINE GEOSCIENCES O12 - 05 MULTIBEAM BACKSCATTER SEABED CLASSIFICATION X. Monteys D. Inamdar Geologic Survey of Ireland Dublin Ireland The Irish National Seabed Survey is now into its sixth and final year of acquisition programme. The Irish continental shelf deeper than 200 meters was completed in 2002 and since then the survey operations have concentrated in coastal areas Zone 2 water depths ranging from 0 to 200m utilizing the R.V Celtic Explorer. Paper charts to 1:60 000 scale from the Malin Sea north-west of Ireland together with a GIS database have been produced to serve as a
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Altimeter Range Determination And Applications Using A Transponder
Authors E. Cristea, W. Hausleitner and P. PesecGLOBAL CHANGES & MARINE GEOSCIENCES O12 - 06 ALTIMETER RANGE DETERMINATION AND APPLICATIONS USING A TRANSPONDER Summary E. Cristea; W. Hausleitner; P. Pesec Space Research Institute Austrian Academy of Sciences Graz Austria Satellite altimetry provides a precise measure of the vertical distance of the satellite borne altimeter to the instantaneous sea surface. The accuracy of this distance depends on the calibration of the altimeter the quality of the reflecting target and the proper estimate of path delay. The general design characteristics for absolute altimeter calibration implies a large number of measurements to reduce the random errors diversity of measurement techniques
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Satellite Remote Sensing And Gps Data For Seismic Hazard Analysis In Vrancea Area
Authors M. Zorana and D. MateciucREMOTE SENSING & SATELLITE IMAGERY O13 - 01 SATELLITE REMOTE SENSING AND GPS DATA FOR SEISMIC HAZARD ANALYSIS IN VRANCEA AREA Summary Maria Zorana 1 Doru Mateciuc 2 1 National Institute of R&D for Optoelectronics Remote Sensing Dept. MG5 Bucharest-Magurele Romania 2 National Institute of Earth Physics Bucharest-Magurele Romania The seismic hazard of Romania is relatively high mainly due to the subcrustal earthquakes located at the sharp bend of the Southeast Carpathians in Vrancea region one of the most seismically active area in Europe. Vrancea area is assumed to be a conjunction of 4 tectonic blocks which lie on the
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Recognition Of Iron-Containing Ore Minerals And Rocks Using Remotely Sensed Data
Authors D. Borisova, H. Nikolov, M. Danov and R. KanchevaREMOTE SENSING & SATELLITE IMAGERY O13 - 02 RECOGNITION OF IRON-CONTAINING ORE MINERALS AND ROCKS USING REMOTELY SENSED DATA D.Borisova H.Nikolov M.Danov R.Kancheva Solar-Terrestrial Influences Laboratory – Bulgarian Academy of Sciences Sofia Bulgaria Summary Abstract Recognition of iron-containing ore minerals and rocks using remotely sensed data is a special case. Spectral mixture analysis has as one of the basic objective the definition of subpixel (subclass) proportions of spectral endmembers (classes) which are related to mappable surface constituents. Spectral mixture analysis decomposes the mixed pixel determining the fractions of each spectral endmember which combine to produce the mixed pixel's spectral signature.
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Tectonic Alignments Analysis In Oas-Gutai Mts. Area (Nw Romania) By Remote Sensing And Geophysical Methods
Authors D. Dordea, V. Sprinceana and A. DobrescuProspectiuni S.A.O13 - 03 REMOTE SENSING & SATELLITE IMAGERY TECTONIC ALIGNMENTS ANALYSIS IN OAS-GUTAI MTS. AREA (NW ROMANIA) BY REMOTE SENSING AND GEOPHYSICAL METHODS D. Dordea 1 V. Sprinceană 1 A. Dobrescu 2 1 Prospectiuni S.A. Caransebes Str. 1 Bucharest Romania 2 Geological Institute of Romania Caransebes Str. 1 Bucharest Romania The Baia Mare region (East Carpathians - Romania) is one of the famous ore deposit areas in Europe with a two centuries mining history (gold cooper base metal) which offered to science a huge mineralogical heritage. Geological mapping on the area began in the last decade of the 19 th
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The 3D Seismic Performance For The Thin Reservoir Evaluation In The Moesian Platform (Bilciuresti Area)
Authors M. Tanasa, C. Manea and M. CismaruO14 - 01 SEISMIC MODELLING & INTERPRETATION THE 3D SEISMIC PERFORMANCE FOR THE THIN RESERVOIR EVALUATION IN THE MOESIAN PLATFORM (BILCIURESTI AREA) Mihai Tanasa 1 Constantin Manea 1 Marin Cismaru 2 1 S.C. Prospectiuni S.A. Bucharest Romania 2 S.N. Romgaz S.A. Medias Romania Introduction. The Upper Pliocen (Meotian Sarmatian) sedimentary in the northern area of the Moesian Platform has many clastic reservoirs. Generally the reservoirs have thin thickness (average 10 m or under 10 m) and there are in the 1900-2500 m depth interval. The adequate 3D seismic works (acquisition processing and interpretation) represent the support for the identification and
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Do Seismic Attributes Reduce Exploration Risk In The Carpathian Foredeep, Northern Romania?
Authors J. Donato and L. IonescuO14 - 02 SEISMIC MODELLING & INTERPRETATION DO SEISMIC ATTRIBUTES REDUCE EXPLORATION RISK IN THE CARPATHIAN FOREDEEP NORTHERN ROMANIA? John Donato 1 Laurentiu Ionescu 2 1 Falcon Romania S.R.L. and Merlin Energy Resources Ltd. United Kingdom 2 S.N.G.N. Romgaz S.A. Romania Introduction Falcon Oil and Gas Romania s.r.l operates two Groups currently exploring three blocks located within northeastern Romania (see Figure 1): (i) Block EIII-1 (Brodina) and Block EIII-3 (Cuejdiu) Falcon Oil and Gas Romania s.r.l. (Operator) 28.75% SNGN Romgaz S.A. 37.5% Europa Oil & Gas Ltd. 28.75% Millennium Intl. Resources Corp. 5.0%. (ii) Block EIII-4 (Bacau) Falcon Oil and
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Advancing 3D Seismic Interpretation Methods For Unconventional Fractured Gas Reservoirs
By J. J. ReevesO14 - 03 SEISMIC MODELLING & INTERPRETATION ADVANCING 3D SEISMIC INTERPRETATION METHODS FOR UNCONVENTIONAL FRACTURED GAS RESERVOIRS James J. Reeves GeoSpectrum Inc. Midland TX 79702-3399 USA Fractures are often responsible for enhancing production in oil and gas reservoirs. They play an important role for defining sweet spots in many producing regions of the world. For the last 5 years Dr. James J. Reeves Principal Investigator has worked for the U. S. Department of Energy to advance a new 3D seismic interpretation method for tight gas fractured reservoirs in the San Juan Basin of New Mexico (see Reeves and Smith World
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3D Seismic Integrated Interpretation The Oligocene Of Tutana - Zarnesti Area – Getic Depression
Authors M. Vasiliu, E. Nicolae and I. CincaO14 - 04 SEISMIC MODELLING & INTERPRETATION 3D SEISMIC INTEGRATED INTERPRETATION THE OLIGOCENE OF TUTANA - ZARNESTI AREA – GETIC DEPRESSION Mirela Vasiliu 1 Eugenia Nicolae 2 Irina Cinca 1 1 PETROM S.A. Bucharest Romania 2 C.C.P.E.G. Campina Romania The Getic Depression constitutes the Tertiary foredeep that developed to the south of the Southern Carpathians and lies between Dambovita Valley to the est and the Danube to the west being bordered to the south by the Moesian Platform through the Pericarpathian fault. The Getic Depression evolved as a sedimentary basin from the Paleogene till the end of the Pliocene. Journal
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A Crustal Structure Model From The North Dobrogea Through The Vrancea Region To The Western Transylvania
Authors V. Raileanu, F. Hauser, W. Fielitz, C. Dinu, A. Bala, M. Landes and C. ProdehlO14 - 05 SEISMIC MODELLING & INTERPRETATION A CRUSTAL STRUCTURE MODEL FROM THE NORTH DOBROGEA THROUGH THE VRANCEA REGION TO THE WESTERN TRANSYLVANIA V. Raileanu 1 F. Hauser 2 W. Fielitz 2 C. Dinu 3 A. Bala 1 M. Landes 2 C. Prodehl 2 1 National Institute for Earth Physics Bucharest Romania 2 University of Karlsruhe Germany 3 University of Bucharest Romania Introduction Vrancea region is one of the highest risk seismic area from SE Europe. Two large earthquakes occurred in the last century resulting in many casualties within densely populated areas. To increase the knowledge of the causes which
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Tomography And Non-Linear Inversion In The Southeast Carpathians
Authors R. B. Raykova and G. F. PanzaO14 - 06 SEISMIC MODELLING & INTERPRETATION TOMOGRAPHY AND NON-LINEAR INVERSION IN THE SOUTHEAST CARPATHIANS Reneta B. Raykova 1 Giuliano F. Panza 2 1 Geophysical institute Sofia Bulgaria 2 DST University of Trieste and SANG group ICTP Trieste Italy Summary A set of shear-wave velocity models of the lithosphere-asthenosphere system in southeast Carpathians is determined by non-linear inversion of surface wave group velocity data. The local dispersion curves are constructed for the period range 10 -150 s combining regional and global Rayleigh wave group velocity data. The lithosphere-asthenosphere velocity structure is reliably reconstructed to depths of about 250 km. The
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The Use Of P- And S-Wave Pulses To Identify Seismic Wave Attenuation In South Eastern Carpathians Area
Authors M. Popa, E. Popescu, A. O. Placinta, M. Radulian, B. Grecu and G.F. PanzaO15 - 01 SEISMOLOGY & EARTHQUAKES THE USE OF P- AND S-WAVE PULSES TO IDENTIFY SEISMIC WAVE ATTENUATION IN SOUTH EASTERN CARPATHIANS AREA M. Popa 1 E. Popescu 1 A. O. Placinta 1 M. Radulian 1 B. Grecu 1 G.F. Panza 2 1 National Institute For Earth Physics Bucharest – Magurele Romania 2 Universita Di Trieste and Abdus Salam International Centre For Theoretical Physics Italy In many active subduction areas (e.g. Kadinsky-Cade et al. 1981; Chiu et al. 1985; Bijwaard et al. 1998; Tsumura et al. 2000) the body waves characteristics show systematic regional-scale variations in the dominant period and
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Preliminary Results Of Shear Waves Splitting At Romanian Broad-Band Network
More LessSEISMOLOGY & EARTHQUAKES O15 - 02 PRELIMINARY RESULTS OF SHEAR WAVES SPLITTING AT ROMANIAN BROAD-BAND NETWORK Summary Marian Ivan 1 Mihaela Popa 2 Daniela Ghica 2 1 University Of Bucharest Faculty of Geology and Geophysics Romania 2 National Institute for Earth Physics Bucharest - Magurele Romania Preliminary results of shear-waves splitting performed at the Romanian Broad-Band network are presented for the time period starting with 2001 January 1 st . For MLR station the average direction (25 values) of the fastest axis (D) is 52°±4° (95% confidence level) and the delay time is δt=1.1±0.1 seconds. For the broad-band instrument BUR31
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Vrancea Intermediate-Depth Earthquakes In Romania -Seismicity And Mechanisms-
Authors N. Hurukawa, M. Popa and M. RadulianO15 - 03 SEISMOLOGY & EARTHQUAKES VRANCEA INTERMEDIATE-DEPTH EARTHQUAKES IN ROMANIA -SEISMICITY AND MECHANISMS- Nobuo Hurukawa 1 Mihaela Popa 2 Mircea Radulian 2 1 International Institute of Seismology and Earthquake Engineering (IISEE) Building Research Institute Tsukuba Ibaraki 305-0802 Japan 2 National Institute of Physics of the Earth (INFP) Bucharest Romania Isolated intermediate-depth earthquakes occur at the SE corner of the Carpathian arc in central Romania. The depth ranges from 60 to 200 km and epicenters concentrate 40 km x 90 km area in Vrancea. Since there is no plate boundary at present they say there was a paleosubduiction zone. The
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Temporal Variation Profiles Of Seismicity Along Seismotectonic Zones In Greece
Authors I. Baskoutas, G. Papadopoulos, T. Rontoyianni and George StavrakakisSEISMOLOGY & EARTHQUAKES O15 - 04 TEMPORAL VARIATION PROFILES OF SEISMICITY ALONG SEISMOTECTONIC ZONES IN GREECE Ioannis Baskoutas 1 George Papadopoulos 2 Theodora Rontoyianni 3 George Stavrakakis 1 1 Geodynamic Institute National Observatory of Athens Greece 2 Earthquake Planning and Protection Organization of Greece 3 School of Mining and Metallurgical Engineering National Technical University of Athens Greece Summary Detailed temporal variation analysis of seismic parameters is performed in consecutive seismotectonic zones along NE-SW direction of Hellenic arc. in order to investigate their temporal profiles. For this investigation the logarithm of the number of earthquakes logN estimates of b-value and energy
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3D P-Wave Velocity Structure Beneath Sultandagi, Afyon, Turkey, From Local Earthquake Tomography
Authors A. N. Dinç and A. KaramanO15 - 05 SEISMOLOGY & EARTHQUAKES 3D P-WAVE VELOCITY STRUCTURE BENEATH SULTANDAĞI AFYON TURKEY FROM LOCAL EARTHQUAKE TOMOGRAPHY Aysun Nilay Dinç and Abdullah Karaman Department of Geophysics Istanbul Technical University Maslak 34469 Istanbul Turkey Summary Sultandağı fault in Afyon Turkey remains within a transition zone between the extentional tectonic regime in the west and Central Anatolia Ova Province. The Sultandağı fault had been silent until October 1 1995 earthquake with a magnitude of ML= 5.9. This earthquake was followed by two more devastating earthquakes on Februrary 3 2002 with magnitudes of Mw=6.5 and Mw=5.8. These last earthquakes inflicted damage in
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Stochastic Modelling Of The Relaxation Process After The M=9.0, Sumatra Earthquake Of December 26, 2004; Preliminary Analysis
Authors D. Gospodinov, V. Karakostas and R. PapadimitriouO15 - 06 SEISMOLOGY & EARTHQUAKES STOCHASTIC MODELLING OF THE RELAXATION PROCESS AFTER THE M=9.0 SUMATRA EARTHQUAKE OF DECEMBER 26 2004; PRELIMINARY ANALYSIS Dragomir Gospodinov 1 Vassilis Karakostas 2 Ritsa Papadimitriou 2 1 Geophysical Institute of the Bulgarian Academy of Sciences 4000 Povdiv Bulgaria 2 Geophysics Department University of Thessaloniki GR54124 Thessaloniki Greece Introduction One of the strongest earthquakes after 1900 with magnitude M=9.0 took place on December 26 in Sumatra Indonesia causing a tsunami wave and more than 150 000 casualties. The shock triggered numerous aftershocks some of them being very strong and causing secondary aftershock activity. At a
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A Study Regarding The Relationships Between Dynamic Parameters And Drillability Index Of Some Rocks
Authors R. Altindag, Z. Kamaci, A. Etiz and N. SengünO16 - 01 BOREHOLE GEOPHYSICS & PHYSICAL PROPERTIES OF ROCKS A STUDY REGARDING THE RELATIONSHIPS BETWEEN DYNAMIC PARAMETERS AND DRILLABILITY INDEX OF SOME ROCKS Raşit Altındağ 1 Züheyr Kamacı 2 Ali Etiz 2 Nazmi Şengün 1 1 SDU Department of Mining Engineering 32260 Isparta Turkey 2 SDU Department of Geophysical Engineering 32260 Isparta Turkey Summary The factors affecting the rock drillability can be divided into three main categories such as geological properties machine parameters and operating parameters. The geological properties mainly affect the drilling performance and the bit wear. Machine and the operating parameters can be somewhat controlled but the
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Bayesian Rock-Physics Inversion For Fracture Characterization
More LessBOREHOLE GEOPHYSICS & PHYSICAL PROPERTIES OF ROCKS O16 - 02 BAYESIAN ROCK-PHYSICS INVERSION FOR FRACTURE CHARACTERIZATION D. Sava 1 G. Mavko 2 1 Bureau of Economic Geology The University of Texas at Austin USA 2 Geophysics Department Stanford University USA Summary We present a methodology for quantitative integration of geological information with seismic data using rock physics theories formulated in the framework of an inverse problem. We illustrate this method with fracture characterization of hydrocarbon reservoirs. There are different types of information that can be used to study fractures such as geologic seismic and well-log and each one of them
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Determination Of Water Saturation For Anisotropic Formations
By I. MalureanuBOREHOLE GEOPHYSICS & PHYSICAL PROPERTIES OF ROCKS O16 - 03 DETERMINATION OF WATER SATURATION FOR ANISOTROPIC FORMATIONS I. Malureanu Oil and Gas University of Ploiesti Romania The calculation of water saturation in the flushed zone and uninvaded zone requires the following data: porosity true resistivity shale resistivity shale volume water resistivity and empirical factors. The evaluation of fluids saturation in shally formation is more difficult because all logs are affected by shale existence. The influence of shale depends on its amount and physical properties. A lot of equations based on physical models and experimental data.were elaborated to deteriminate the water
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