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67th EAGE Conference & Exhibition
- Conference date: 13 Jun 2005 - 16 Jun 2005
- Location: Madrid, Spain
- Published: 13 June 2005
61 - 80 of 683 results
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Improving Seismic Imaging Using Global Offset, Geo-Electric and Electromagnetic Methods
More LessB032 Improving seismic imaging using global offset geo-electric and electromagnetic methods 1 Introduction In many complex geological settings imaging accurately the shallow sedimentary sequences is a key step in order to interpret properly also the deeper part of the seismic sections. In fact processing work-flows that are not focused in solving imaging problems in the shallow part of the data (first 300-500ms) can prevent a satisfactory imaging also at target depth. That is the case when the presence of shallow high-velocity layers and near surface geological complexity can cause sharp lateral and vertical velocity variations. Due to the low signal
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Integrated Pore-Pressure Prediction Using High-Resolution Seismic Velocity and Rock Physics
Authors J. Khazanehdari, N. Dutta, M. Portet and R. BachrachB033 Integrated pore-pressure prediction using highresolution seismic velocity and rock physics Abstract 1 The present seismic-based geopressure techniques use calibrated seismic velocity to pressure as a means of estimating background shale pressure. These methods lack the necessary highresolution velocity and pressure information required for drilling proposes. A fully integrated seismic pore-pressure prediction (iPPP) that can be used for drilling requires important elements such as high-resolution velocity a rock-physics-based pressurevelocity model and a sound understanding of lithology structure and fluid types. This paper describes a practical workflow that uses both seismic inversion and velocity analysis to obtain a high-resolution seismic velocity.
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Real Time Update of 3D Velocity Model for Steering Wells on Seismic Data
Authors F. Pivot, F. Bertini, F. Mansanne, G. Morin and N. KeskesB034 Real time update of 3D velocity model for steering wells on seismic data Abstract 1 Quality enhancement of seismic data allows to build seismic attributes (like lithoseismic cubes) that are precious for predicting encountered geology during the drilling of the well. However these data are often poorly used because all drilling operations are conducted in depth while seismic data are in two-way time. Of course it is possible to apply time to depth conversion in order to obtain seismic information in depth. However during the drilling phase the time-depth conversion mismatches rapidly. We propose here a strategy suited for
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The 2004 BP Velocity Benchmark
Authors F.J. Billette and S. Brandsberg-DahlB035 The 2004 BP Velocity Benchmark Abstract 1 In 2004 BP conducted a 2D velocity model estimation benchmark study. The study was open to all interested parties and was constructed as a blind test of available velocity model estimation/building techniques. The test was based on a 2D synthetic (finite-difference) dataset generated by BP which was made available to the interested parties. After receiving the data the participating groups were offered to present their results at the 2004 EAGE workshop and/or provide the results to BP to partake in the overall evaluation. In this paper we will present the model used
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New Quality Metric for Validation of Velocity Models
Authors F. Ljones, M. Nickel, G.G. Borgos, L. Sonneland and R. MjeldeB036 Abstract 1 The crucial analysis step in seismic processing is to establish an optimal velocity model. The quality of the velocity model has a major influence on the quality of the final processing result. The quality of the velocity model can be measured by how well the velocities NMOcorrect the common reflection-point gathers (CRP). However after transformation of the CRP-gathers to zero offset it is impossible to validate the quality of the velocity model without invoking the prestack CRP-gathers. It is prohibitive to pass an undecimated prestack seismic data volume to the interpretation stage. As a result of this
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Automatic, Dense and Volumetric Picking for High-Resolution 3D Tomographic Model Building
Authors V. Dirks, B. Wang, D. Epili, D. Wheaton, P. Guillaume and F. AudebertZ-99 Automatic dense and volumetric picking for high-resolution 3D tomographic model building B037 Abstract 1 As survey sizes are steadily increasing 3D tomography as the key component of today’s velocity model building workflows has to be performed on large data volumes within acceptable turnaround times. To provide high-resolution velocity models dense volumetric picking is required. This leads to even larger data volumes. It is therefore paramount to automate as many processing steps as possible to free the time of the geophysicist for the necessary QC. In this paper we present a modified workflow for high-resolution 3D tomography addressing the need
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3D Grid Tomography Based on Focusing Analysis
Authors B. Wang, F. Qin, V. Dirks, P. Guillaume, F. Audebert and D. EpiliZ-99 3D grid tomography based on focusing analysis B038 Abstract 1 We have developed a new 3D grid tomography based on the analysis of focusing errors. The seismic input to this new velocity analysis is a set of migration panels that are stack images formed at various imaging conditions zero-time or non zero-time. By comparing these different common focusing error panels the best focused events and their corresponding focusing errors are picked. The picked focusing errors and associated local reflector attributes (position and dip) are then fed into the existing 3D grid tomography to update the velocity model. This new
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Tomographic Residual Moveout Inversion of PreSTM Common-Image-Gathers
More LessZ-99 Tomographic residual moveout inversion of PreSTM common-image-gathers B039 Abstract 1 We present a new tomographic inversion technique for 3D anisotropic velocity-depth model building which inverts the residual moveout in PreSTM image gathers in a horizon consistent manner using the interpretations in the corresponding time migrated image. Our experience shows that tomographic inversion of PreSTM residual moveout provides velocity-depth models that require only small final updates via PreSDM residual moveout inversion in case of moderately complex structures. Since tomography after PreSTM uses time domain data it allows full non-linear inversion which shortens considerably the PreSDM cycle on industrial projects. Another
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3-D Inversion with Kinematic Wavefield Attributes
By N.-A. MüllerB040 0-00 3-D INVERSION WITH KINEMATIC WAVEFIELD ATTRIBUTES N.-A. Müller Geophysical Institute University of Karlsruhe Hertzstr. 16 76187 Karlsruhe Germany Summary. The 3-D Common-Reflection-Surface (CRS) stack provides an entire set of kinematic wavefield attributes which may be used for Dix-type inversion algorithms. These methods iteratively evaluate velocity models of the subsurface starting from the measurement surface. In general the models obtained are characterized by blocks of constant velocities separated by smooth first-order interfaces. Due to the iterative nature of this methods implementations suffer from error accumulation with increasing number of interfaces. In order to avoid this problem the Dix-type method
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Pore- to Field-Scale Multi-Phase Upscaling for IOR (SPE94191)
Authors T.R. Lerdahl, A.B. Rustad, T.G. Theting, J.Å. Stensen, P.E. Øren, S. Bakke, T. Boassen and B. PalatnikSPE 94191 Pore- to Field-Scale Multi-Phase Upscaling for IOR T.R. Lerdahl SPE A.B. Rustad SPE T.G. Theting SPE J.Å. Stensen SPE P.E. Øren SPE S. Bakke SPE T. Boassen SPE and B. Palatnik SPE Statoil Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and
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Improved Fluid Characterization for Miscible Gas Floods (SPE94034)
Authors A.M. Egwuenu, R.T. Johns and Y. LiSPE 94034 Improved Fluid Characterization for Miscible Gas Floods A.M. Egwuenu R.T. Johns and Y. Li SPE The U. of Texas at Austin Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material as presented does
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Effect of Geologic Parameters on CO2 Storage in Deep Saline Aquifers (SPE93952)
Authors S. Mo, P. Zwiegel, E. Lindeberg and I. AkervollSPE 93952 Effect of Geologic Parameters on CO2 Storage in Deep Saline Aquifers S. Mo SPE P. Zweigel E. Lindeberg SPE and I. Akervoll SPE SINTEF Petroleum Research Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s).
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The Impact of Pertinent Parameters on the Design of Hydraulic Fracturing in Gas Condensate Reservoirs (SPE94074)
Authors G.A. Carvajal, A. Danesh, M. Jamiolahmady and M. SohrabiSPE 94074 The Impact of Pertinent Parameters on the Design of Hydraulic Fracturing in Gas Condensate Reservoirs G.A. Carvajal A. Danesh M. Jamiolahmady and M. Sohrabi Petroleum Engineering Inst. Heriot-Watt U. Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction
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Productivity Assessment of Fractured and Non-Fractured Wells in a Lean/Intermediate Low Permeability Gas Condensate Reservoir (SPE93136)
Authors T. Baig, U. Droegemueller and A.C. GringartenSPE 93136 Productivity Assessment of Fractured and Non-Fractured Wells in a Lean/Intermediate Low Permeability Gas Condensate Reservoir T. Baig and U. Droegemueller Wintershall AG and A.C. Gringarten Imperial College London Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction by
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Integrating Continuous 4D Seismic Data Into Subsurface Workflows
Authors O.I. Barkved, J.H. Kommedal, T.G. Kristiansen, K. Buer, R.M. Kjelstadli, N. Haller, M. Ackers, G. Sund and R. BakkeC001 Integrating Continuous 4D Seismic Data Into Subsurface Workflows Summary 1 In the period from October 2003 to November 2004 four seismic surveys have been acquired across the permanently installed seismic array (LoFS) at the Valhall Field Offshore Norway [1]. The installation followed the demonstration of significant production induced 4D seismic response when matching a marine streamer 4D survey acquired in 2002 to a survey acquired in 1992 [2]. Capturing the value of the continuous 4D seismic monitoring scheme implemented at Valhall is contingent on multidisciplinary integration of the 4D seismic products with other subsurface data. The potential and limitations
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Reservoir Management of the Njord Field (SPE92419)
Authors S. Talukdar and L.H. BrusdalSPE 92419 Reservoir Management of the Njord Field S. Talukdar SPE and L.H. Brusdal SPE Hydro Oil and Energy Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material as presented does not necessarily reflect any
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History Matching Using 4D Seismic and Pressure Data on the Norne Field
Authors M. Lygren, O. Husby, B. Osdal, Y. El Ouair and M. SpringerC003 HISTORY MATCHING USING 4D SEISMIC AND PRESSURE DATA ON THE NORNE FIELD Abstract 1 The Norne reservoir simulation model was history matched to time-lapse seismic data (acoustic impedance) and downhole pressure data (RFT) using the method of computerassisted history matching. The mismatch of the reservoir simulator was reduced compared to history matching of well data only. This led to an increased understanding of the flow in the reservoir and to increased confidence in the 4D interpretations which are important input to the well-planning at Norne. Introduction The Norne Field is situated in the southern part of the Nordland II
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The Geochoke Well Test Response in a Catalogue of Systematic Geotype Curves (SPE93992)
Authors P.W.M. Corbett, Y. Ellabad, J.I.K. Egbert and S. ZhengSPE 93992 The Geochoke Well Test Response in a Catalogue of Systematic Geotype Curves P.W.M. Corbett SPE Y. Ellabad 1 J.I.K. Egert 2 and S. Zheng SPE Heriot-Watt U. Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the
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Reservoir Monitoring with Pulsed Neutron Capture Logs (SPE94199)
Authors C. Morris, T. Aswad, F. Morris and T. QuinlanSPE 94199 Reservoir Monitoring with Pulsed Neutron Capture Logs C. Morris SPE Schlumberger T. Aswad SPE BP America Inc. and F. Morris and T. Quinlan SPE Schlumberger-PTC Copyright 2005 Society of Petroleum Engineers This paper was prepared for presentation at the SPE Europec/EAGE Annual Conference held in Madrid Spain 13-16 June 2005. This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper as presented have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The
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