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63rd EAGE Conference & Exhibition
- Conference date: 11 Jun 2001 - 15 Jun 2001
- Location: Amsterdam, Netherlands
- Published: 11 June 2001
61 - 80 of 516 results
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Recent Developments in Volume Interpretation in Shell
F-25 RECENT DEVELOPMENTS IN VOLUME INTERPRETATION IN SHELL Abstract 1 H.J. POELEN S. GESBERT J.C. JAUFFRED P. VAN TOORN G.C. FEHMERS And THE SHELL GLOBAL VOLUME INTERPRETATION TEAM Shell International Exploration and Production – Technology Applications and Research Volmerlaan 8 Postbus 60 2280 AB Rijswijk The Netherlands If an image is worth a thousand words then a volume could well be worth hundred thousand or even a million words! The wealth of information contained in 3D seismic “images” – in fact volumes – is staggering and recent years have seen a revolution in immersive scientific visualization to render subsurface data
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Selecting and Combining Attributes to Enhance Detection of Seismic Objects
Authors P.F.M. De Groot, H. Ligtenberg, P. Meldahl and R. HegglandF-26 SELECTING AND COMBINING ATTRIBUTES TO ENHANCE DETECTION OF SEISMIC OBJECTS Abstract 1 This paper describes recent experiences with the seismic object detection method developed by Meldahl et al. (1998 and 1999). In this patent pending method supervised or unsupervised neural networks are used to transform multiple ‘directive’ attributes into ‘object probability’ classes. The method is used a/o to detect seismic chimneys and faults (Heggland et al. 1999 and 2000). Selection of attributes is a crucial step in the procedure especially in the unsupervised mode. In this paper we discuss methods and criteria to optimize the attribute selection process. Furthermore
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Shared Earth System Models for the Dutch Subsurface
Authors J.D. Van Wees, R. Versseput, H.J. Simmelink, R. Allard and H. PagnierF-27 SHARED EARTH SYSTEM MODELS FOR THE DUTCH SUBSURFACE Summary 1 TNO-NITG is the central geoscience institute in the Netherlands for information and applied research to promote the sustainable management and use of the subsurface and its natural resources. Like any other geological survey TNO-NITG faces the challenge of disseminating geoscience data and subsurface interpreted models at low cost. For this purpose TNO-NITG has developed an internet based distribution system coupled with an in-house developed free 3D Java Viewer. In a first step data and volumetric models of the Dutch deep subsurface have been digitally compiled and optimally tuned to
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Geological Interpretation Makes Earth Models Easier to Build
Authors M. Perrin, S. Brandel, J.F. Rainaud and S. SchneiderF-28 GEOLOGICAL INTERPRETATION MAKES EARTH MODELS EASIER TO BUILD Abstract 1 We propose to add to 3D geological modelers a geological pilot which allows the end user to formalize his interpretation and then monitors the building of the model in a fully automatic way. The result is both geometrically and geologically consistent and it can be automatically revised whenever necessary. 1/ Introduction Geological modelers commonly produce 3D Earth Model representations [2] [3] [6] which are not only used for 3D visualization but also for geophysics (Time2depth migration) reservoir characterization drilling well path optimization and reservoir engineering. These models should be
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Isolating Individual Channel Sequences Using 3D Visualization and Multi-Attribute Techniques in a Stacked Channel Complex, Ultra Deepwater Brazil
Authors D.E. Meyer, T.E. Bulloch, E.A.L. Harvey, T.M. Sheffield and R. RobersonF-29 ISOLATING INDIVIDUAL CHANNEL SEQUENCES USING 3D VISUALIZATION AND MULTI-ATTRIBUTE TECHNIQUES IN A STACKED CHANNEL COMPLEX ULTRA DEEPWATER BRAZIL Summary 1 The complex stacking patterns and internal geometry of channels are very difficult to interpret in 2D or 2.5-D interpreting environments. Using geovolume visualization and interpretation (GVI) in a 3-D environment along with seismic attribute analysis is key to understanding the geological relationships of these channel complexes. This paper will give an example workflow to accurately and quickly evaluate these systems and isolate individual channel elements. Utilizing techniques such as multi-attribute voxel detection and surfaces that block auto picking allow
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Controlling Structure in Depth Conversion
More LessF-30 CONTROLLING STRUCTURE IN DEPTH CONVERSION ADAM J. ROBINSON 1 Dynamic Graphics Limited (A subsidiary of Dynamic Graphics Inc.) 1 Forest Court Oaklands Park Fishponds Road Wokingham Berkshire RG41 2QJ UK Key words: 3D structure model Depth Conversion Vo-K Geospatial Abstract The use of basic mapping and modelling techniques applied to field studies for reservoir characterization are reaching a state of ‘equilibrium’ whereby the geoscientists workflow will either describe a reservoir as a series of 2D maps or will utilise a 3D mapping package generating a coherent 3D reservoir model. Each of these approaches they are widely accepted but it
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Sequence Stratigraphy and Seismic Impedance - A New Approach to Reservoir Characterisation
Authors D.R. Atkins, M. Wilson and M.S. SamsF-31 SEQUENCE STRATIGRAPHY AND SEISMIC IMPEDANCE – A NEW APPROACH TO RESERVOIR CHARACTERISATION Abstract 1 In reservoir characterisation we strive to develop a unified model of the reservoir that integrates the available seismic well log geologic and engineering data. Such models are best derived in the context of a sequence stratigraphic framework. A methodology is presented which uses sequence stratigraphy to accurately tie well log and seismic data within a realistic geological context. An impedance volume is then generated that fully integrates the geological petrophysical and engineering data and which can permit interpretation at the flow unit scale. Such reservoir
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Detection of Seismic Objects, the Fastest Way to Do Prospect and Geohazard Evaluations
Authors R. Heggland, P. Meldahl, P. De Groot and B. BrilF-32 DETECTION OF SEISMIC OBJECTS THE FASTEST WAY TO DO PROSPECT AND GEOHAZARD EVALUATIONS Abstract 1 A method for automated detection of seismic objects has been developed recently by Meldahl et al. (1998 and 1999). Initial applications included the detection of seismic chimneys and faults (Heggland et al. 1999 and 2000). However the method which uses a neural network to transform multiple ‘directive’ attributes into ‘object probability’ classes has general applicability to detect a range of seismic objects. Application of the method to detect objects such as reflectors faults chimneys flat spots traps etc. which are normally mapped during a
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3D-4C Acquisition Design for Fractures Characterization in Carbonate Reservoir - a Case History in Offshore Adriatic, The Emilio Field
Authors M. Buia, D. Delaney, V. De Tomasi and L. VetriF-33 3D-4C ACQUISITION DESIGN FOR FRACTURES CHARACTERIZATION IN CARBONATE RESERVOIR – A CASE HISTORY IN OFFSHORE ADRIATIC THE EMILIO FIELD Summary 1 The multicomponent 3D methodology is already well established as a suitable tool for imaging through gas clouds for fluid detection and for petrographic assessment; however there are very few examples of its use in fracture detection and characterization. A 3D-4C survey aimed to assess crack direction and density was planned on a gas-oil reservoir in the Adriatic Sea. The Emilio field resides in Eocene carbonate rocks characterized by low primary porosity and fractures. The feasibility study and the
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Single Source 3D Seismic Acquisition in a Poor Data Quality Area Mid-Norway
Authors B. Krokan, T. Selbekk and S. HegnaF-34 SINGLE SOURCE 3D SEISMIC ACQUISITION IN A POOR DATA QUALITY AREA MID-NORWAY Introduction 1 During the summer 2000 PGS acquired a 2 332km 2 exploration 3D survey in the Dønna Terrace West area offshore mid-Norway. The area is situated to the west of the Norne Field and to the north of the Heidrun Field. The water depth varies between 300m and 450m. Seismic data previously acquired in this region are hampered by very low Signal to Noise Ratio (SNR) and strong multiples especially those related to the water bottom. The Dønna Terrace West survey was acquired with a single
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Air Gun Signature Estimation Using Gun-Mounted Pressure Transducers
More LessF-35 AIR GUN SIGNATURE ESTIMATION USING GUN-MOUNTED PRESSURE TRANSDUCERS SUMMARY Continuous measurement of marine source signatures is now becoming an oil company requirement in offshore petroleum exploration. There is a simultaneous service company requirement to simplify and streamline the air-gun arrays. Pressure measurements at the air gun ports have the potential to address both requirements: they can yield the radiated pressure field while simultaneously eliminating the need for separate time-break sensors. They would also permit pigtails to be eliminated in the air gun array. The algorithm to calculate the pressure field from pressure measurements at the gun ports is demonstrated
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3D Cerro Falcone, Quality and Operations Management
Authors S. Solari, M. Fermi and R. PuricelliF-36 3-D CERRO FALCONE QUALITY AND OPERATIONS MANAGEMENT M.FERMI R.PURICELLI and S. SOLARI ENI-Agip Division Via dell'Unione Europea 3 20097 San Donato Milanese MI Italy 1 Summary ENI-Agip awarded Schlumberger/Geco-Prakla the acquisition of the largest continental Europe 3-D seismic program. The 3-D Cerro Falcone survey was located in the Southern Italian Apennine mountains over a 520 squared kilometer area. This case history describes how the Client and Contractor’s Quality Systems interacted in order to manage this complex 3-D prospect with its numerous physical hazards permit restrictions a wide range of public concerns and different types of environments. The fundamental acquisition
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Applications and Challenges for High Resolution Airborne Surveys in Populated Areas
Authors M.K. Lee, R.J. Peart, R.J. Cuss, D.G. Jones, D. Beamish and J. VironmakiIA-1 APPLICATIONS AND CHALLENGES FOR HIGH RESOLUTION AIRBORNE SURVEYS IN POPULATED AREAS Introduction 1 The role of high resolution airborne surveys is extending well beyond the traditional areas of mineral and hydrocarbons exploration and regional mapping which were often focused on the relatively unpopulated and remote regions of the world. As an increasing proportion of the Earth’s surface is affected by human activity airborne survey techniques are being adapted and applied to development-related issues in more populated areas. The value of radiometric and electromagnetic data (in particular) has been recognised for addressing a range of environmental issues and more generally
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The Role of Airborne EM Methods for Environmental Applications in Different Geological Terrains
Authors D. Beamish and A. MattssonIA-2 THE ROLE OF AIRBORNE EM METHODS FOR ENVIRONMENTAL APPLICATIONS IN DIFFERENT GEOLOGICAL TERRAINS Abstract 1 This paper reviews the increasing role of Airborne EM (AEM) methods for environmental purposes in a variety of geological contexts. The ability of AEM data to differentiate geological cultural and environmental influences is considered using fixed-wing survey examples from Finland and the UK. The provision of AEM subsurface resistivity information constitutes a unique capability in relation to general remote-sensing information to which it is allied. To be fully exploited the results of AEM surveys require both ground calibration and integration (e.g. through GIS techniques)
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Recent Contributions of BGR to High Resolution Helicopter Geophysics
Authors K.-P. Sengpiel, B. Siemon, D. Eberle and S. GreinwaldIA003 RECENT CONTRIBUTIONS OF BGR TO HIGH RESOLUTION HELICOPTER GEOPHYSICS AUTHORS Abstract 1 The Federal Institute for Geosciences and Natural Resources of Germany (BGR) optimised its helicopter-borne geophysical system to conduct high resolution airborne surveys using electromagnetics (EM) magnetics and gamma-ray spectrometry. The modifications comprise not only the measuring system particularly the five-frequency EM system but also the processing and interpretation software. Using the new developed line based algorithms for the interpretation of magnetic and EM data it is now possible to detect even small waste occurrences e.g. metallic objects at least as large as a steel drum as well
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Using Airborne Hyperspectral Data for Environmental Applications in Anglo American plc
Authors M.F.F. Ferraz, A.J. Franzsen and H. van den BergIA-4 USING AIRBORNE HYPERSPECTRAL DATA FOR ENVIRONMENTAL APPLICATIONS IN ANGLO AMERICAN plc M.F.F. FERRAZ A.J. FRANZSEN and H. VAN DEN BERG Environmental Section Geophysical Services Department Exploration and Acquisitions Division Anglo American plc PO Box 61587 Marshalltown2107 South Africa Abstract 1 The Geophysical Services Department’s (GSD) mandate within Exploration and Acquisitions Division of Anglo American plc has broadened to include some diversification of their remote sensing and geophysical capabilities into the environmental field. The GSD is increasingly involved in optimising existing exploration methodologies by enhancing image processing interpretation and integration activities for environmental applications. This is being implemented through integrated
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Environmental Applications of Airborne Radiometric Surveys
Authors M. Lahti, D.G. Jones, J. Multala and M.P. RaineyIA-5 ENVIRONMENTAL APPLICATIONS OF AIRBORNE RADIOMETRIC SURVEYS Summary 1 Radiometric data have been collected during airborne surveys in eastern Germany and central Britain. Some of the range of environmental applications of this type of data are illustrated. In Germany the effects of uranium mining and processing are clearly shown including the dispersal of contaminants by the local river system. The results also reflect the possible use of mining wastes in construction with distinct radiometric signatures associated with built up areas and roads. The application of fertilizers is indicated by higher potassium concentrations in the airborne data that are supported by
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Airborne Gamma-Ray Surveys over Canadian Nuclear Sites
Authors R.L. Grasty and L. SanderIA-6 AIRBORNE GAMMA-RAY SURVEYS OVER CANADIAN NUCLEAR SITES R.L. GRASTY 1 and L. SANDER 2 1 1 Gamma-Bob Inc 3924 Shirley Ave. Ottawa ON K1V 1H4 Canada 2 Sander Geophysics Summary Sander Geophysics Limited (SGL) and Gamma-Bob Inc. have collaborated to perform airborne gammaray surveys over several nuclear sites in Canada successfully mapping natural and man-made radiation levels. In October 1999 a survey was flown in Ontario over Pickering and Darlington nuclear generating stations using a twin-engine helicopter. The purpose of the survey was both for public information and to be used as a baseline radiometric survey for the area.
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Processors and Systems for Seismic Processing - Status and Trends
By F. BaetkeIC-1 PROCESSORS AND SYSTEMS FOR SEISMIC PROCESSING – STATUS AND TRENDS FRANK BAETKE Abstract The lecture provides a critical review of features at processor and systems level with a special focus on high-performance seismic processing. Some recently introduced technologies will be discussed and analyzed from a performance and a business point of view. 1 HP TCD Richardson/Ft. Collins USA EAGE 63rd Conference & Technical Exhibition — Amsterdam The Netherlands 11 - 15 June 2001 2
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Hardware and Software Issues for Making Large Clusters Effective in a Production Seismic Processing Environment
More LessIC-2 HARDWARE AND SOFTWARE ISSUES FOR MAKING LARGE CLUSTERS EFFECTIVE IN A PRODUCTION SEISMIC PROCESSING ENVIRONMENT CHRISTOF STORK and BRAD WILSON Exploration Design Software Inc. 11200 Westheimer Suite 250 Houston TX 77042 USA Abstract: 1 During the process of shipping software licenses for 3000 CPUs of clustered PC products over the past 24 months we have looked at a variety of hardware configurations compared Linux with Windows 2000/NT and tested numerous software designs. Costs and performance vary significantly. Some software design issues significantly affect the cost of hardware needed and performance of the hardware. We have concluded that staying with
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