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66th EAGE Conference & Exhibition
- Conference date: 07 Jun 2004 - 10 Jun 2004
- Location: Paris, France
- Published: 07 June 2004
21 - 40 of 562 results
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Integrated Stratigraphic, Structural, and Petroleum Systems Analyses in Intraslope Basins with Allochthonous Salt Systems - Examples from the Thunder Horse and Mensa Minibasins, Northern Deep Gulf of Mexico
Authors P. Weimer, V. Matt, R. Bourollec, A. van den Berg and T. LapinskiA031 3-D INTERPRETATION AND PETROLEUM SYSTEMS MODELING OF THE THUNDER HORSE AND MENSA GIANT OIL AND GAS FIELDS NORTHERN DEEP GULF OF MEXICO 1 Paul Weimer Veit Matt Todd Lapinski Aaron van den Berg Renaud Bourorllec and John Roesink Department of Geological Sciences University of Colorado Boulder CO 80309-0399 The Thunder Horse and Mensa fields are two of the largest oil and gas fields respectively in the northern Gulf of Mexico. The evolution of the two minibains and fields reflects the complex interaction of salt tectonics basement structures and major and minor faults. A detailed analysis of the area was
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Stratigraphic and Reservoir Architecture of Tectonically-Confined Turbidite Ramps – The Example of the Grès d'Annot System (Eocene - Oligocene, French Alps)
Authors P. Joseph, E. Du Fornel, T. Euzen, F. Guillocheau and C. RobinA032 Stratigraphic and reservoir architecture of tectonically-confined turbidite ramps : the example of the Grès d’Annot system (Eocene - Oligocene French Alps) 1 P. JOSEPH 1 E. DU FORNEL 1-2 T. EUZEN 1 F. GUILLOCHEAU 2 and C. ROBIN 2 ¹ Institut Français du Pétrole 1 et 4 avenue de Bois Préau 92852 Rueil Malmaison cedex France. ² Géosciences Rennes Université de Rennes 1 Campus de Beaulieu 35042 Rennes France. Summary For a long time the Grès d’Annot system of South East France has been considered as a classic example of a canyon-fed submarine fan settled during a period of
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4D Monitoring at 4 km Depth? A Case Study from Smørbukk Sør in the Åsgard Field
Authors L. Klefstad, O. Eiken and B. OsdalA034 4D MONITORING AT 4 KM DEPTH? A CASE STUDY FROM SMØRBUKK SØR IN THE ÅSGARD FIELD Abstract The Middle Jurassic Garn reservoir sandstones in the Smørbukk Sør field were considered to be too deeply buried in order to respond seismically on production effects. A 4D-feasibility study concluded however that time–lapse signals can be detectable from pore pressure reduction in the reservoir if good repeatability is achieved using new seismic acquisition technology. In 2003 time lapse-data were acquired and processed. We show in this paper some results from this data. Introduction LARS KLEFSTAD 1 OLA EIKEN 2 BÅRD OSDAL 3
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Pressure and Saturation Inversion from 4D Seismic Constrained by Production Data
Authors P. Inderwiesen, N. He and P. CondonA036 PRESSURE AND SATURATION INVERSION FROM 4D SEISMIC CONSTRAINED BY PRODUCTION DATA Abstract We have developed an inversion technology to estimate reservoir pressure and fluid saturation distribution from time-lapse seismic and production data. Bayesian technology is used to construct the objective function; Gauss- Newton method is applied to minimize the objective function in the inversion process. 4D seismic is converted to impedance to minimize the wavelet effect and simplify the inversion scheme. Rock physics links the reservoir properties both static (porosity facies) and dynamic (pressure and saturation) with seismic P & S impedance. The sensitivity of impedance with respect to
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Quantitative Assessment of Connectivity across a Fault Using 4D Seismic
Authors Y. Almaskeri and C. MacBethA037 QUANTITATIVE ASSESSMENT OF CONNECTIVITY ACROSS A FAULT USING 4D SEISMIC Summary 1 YAHYA ALMASKERI AND COLIN MACBETH Heriot-Watt Institute of Petroleum Engineering Edinburgh UK EH14 4AS A 3D geological model is built within which two producing horizontal wells and a normal vertical fault are placed. This scenario is then used as a test-bed to investigate how the 4D seismic might be related to different degrees of fault seal. A reservoir simulation is run and the 4D seismic response computed. The full and limited-offset stack amplitudes at the top reservoir respond similarly to the pressure differences and oil saturation changes
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Integrating 4D Seismic and Geomechanics – A Case Study
More LessA038 Integrating 4D seismic and geomechanics: a case study Abstract 1 Time-lapse (4D) seismic effects have been studied in a depleting gas field. Feasibility studies based on velocitystress relationships derived from core data suggest that large changes in seismic traveltimes may be expected. However our observations from the actual 4D seismic indicate that these effects are significantly smaller than modeled. At the same time timeshifts outside the reservoir zone are observed. These are considered due to geomechanical effects. Geomechanical models of depleting reservoirs predict that as a result of reservoir compaction due to pressure depletion changes in the long-wavelength stress
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Updating Vertical Gas Flow Models in Laminated Reservoirs
Authors V. Kretz, B. Valles and L. SonnelandA039 UPDATING VERTICAL GAS FLOW MODELS IN LAMINATED RESERVOIRS Summary 1 One of the most challenging fields in reservoir engineering is efficient integration of all available data for reservoir characterization and to keep the resulting model updated as new data becomes available. Usually 4D seismic data are quantitatively integrated in the reservoir characterization through history matching. We propose an efficient updating technique that requires no flow simulation. This new technique will be demonstrated for monitoring gas flows using 4D seismic to update the reservoir model. An automatic procedure called “seismic super-resolution” is used to map the gas displacements with a
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Aquifer Gas Storage Monitoring Using 4D Seismic and Integrated Reservoir Simulation
Authors A. Seeliger, R. Hauer and M. KlafkiA040 Aquifer Gas Storage Monitoring Using 4D Seismic and Integrated Reservoir Simulation Abstract Summary 1 A. SEELIGER R. HAUER AND M. KLAFKI ESK GmbH Halsbrücker Str. 34 D-09599 Freiberg Germany The Kalle aquifer gas storage (Figure 1 2) is an example where modern methods of reservoir monitoring have been combined successfully with the update of the geological and the reservoir simulation models. Gas migration from the single storage layer at Kalle the Volpriehausen sandstone to the Detfurth sandstone is known to have started between 1992 and 1995. 4D-seismic regular TDT and RST gas saturation measurements and continuous pressure monitoring in
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Uncertainties in the 4D Seismic Signature due to Seawater Velocity Variations
Authors A. Bertrand, C. Ribeiro and C. MacBethA041 Uncertainties in the 4D seismic signature due to seawater velocity variations Abstract 1 Seawater velocity variations are known to influence the quality of seismic especially in deepwater areas. Here this topic is extended to evaluate the effect on reservoir monitoring. A 3D data set from the Gulf of Mexico has been corrected for seawater velocity variations and the corresponding time and amplitude perturbations are measured. From this a 4D synthetic data set is modelled for realistic reservoir production scenarios. The 4D modelled seismic is perturbed using similar errors to those measured on the real data in order to mimic
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A Petroelastic-Based Approach to Pressure and Saturation Estimation Using 4D Seismic
Authors C. Ribeiro and C. MacBethA042 A petroelastic-based approach to pressure and saturation estimation using 4D seismic Abstract 1 A methodology is developed to invert for time-lapse variations of reservoir pressure and saturation from repeated P-wave seismic data. Based on a simplified petroelastic correlation two independent elastic parameters are obtained; one of which depends on pressure and the other on saturation. Forms for reflectivity and elastic impedance explicitly dependent on production effects are derived and tested on a reservoir model-based study. Following the inversion of multi-angle near mid and far elastic impedance stacks from the baseline and repeat seismic dataset reliable dynamic estimates of pore
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Why We Need Professional Leaders in an Asset Organization
Authors P. Raingeard and J. PionB010 Why we need Professional Leaders in an Asset Organization Abstract Strengths and weaknesses of the asset organization 1 In the last twenty years the asset organization has generalized in a large number of petroleum companies in all parts of the words. A major benefit of this organization is that it places Geosciences at the heart of the projects with a close and focused integration of disciplines (Geophysics Geology and Reservoir). However at the same time it may tend to isolate the Geoscientists from the mainstream of their disciplines and limit their scope to the boundaries of the asset. How
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Managing Subsurface Uncertainty from a Geoscience Perspective – Work Processes in an Asset Team
More LessB011 Abstract 1 Managing subsurface uncertainty from a geoscience perspective - work processes in an asset team ARVE NAESS AND ANDREW MCCANN The Heidrun Field is an oil and gas giant located in the Haltenbank area offshore Mid- Norway. The field's total reserves (2004) are 175 MSm 3 (1 100 M bbl) oil and 40 GSm 3 gas. The field is developed with one Tension Leg Platform (TLP) processing oil and gas produced from one 56-slot platform template and 5 associated sub-sea templates (3 water injection templates and 2 oil production templates each with 4 available well slots). The current
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Achieving Excellence in Exploration – Integrating Skills, Processes and Technology
By M.A. NaylorB012 Achieving Excellence in Exploration: Integrating Skills Processes and Technology 1 Within Shell’s new operating model for Exploration & Production exploration is organized as a global business with unambiguous single point accountability for performance portfolio and resources. This model has been adopted in preference to executing exploration from a series of autonomous asset-based operating units. The latter structure though good at facilitating multi-disciplinary integration does not always optimize resource allocation nor necessarily provide clarity of direction and consistency of process. A dedicated exploration business can take a truly global approach to exploration strategy portfolio and decisionmaking directly linked to the
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Attracting, Developing and Retaining Top Technical People
Authors P.M. Lloyd, J. Kaldi and B. RonaldsB013 Attracting Developing and Retaining Top Technical People Extended Abstract 1 Our industry is graying. The mentors in many of the major companies are gone the in-house training programs in many major companies are gone and the research centers in many major companies are gone. Comparing the E&P landscape just 10 years ago many of the major companies themselves are gone and have been replaced with very different looking organizations. Indeed in 10 years most of the people attending this EAGE conference will be gone. The industry is starting to think hard about the “big crew change”. And as it
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Integration – A New Perspective to Reservoir Studies
By L. CosentinoB014 Integration: A New Perspective to Reservoir Studies Integration in Reservoir Studies 1 In Webster’s definition integration is a combination and coordination of separate and diverse elements or units into a more complete or harmonious whole. Therefore integration is a process whereby extra-value is produced and for this reason it is considered a benefit something to actively seek in multidisciplinary contexts. Actually integration is one of those magic words that always have a positive meaning. Integrated is always better than disintegrated no matter the context. Within the framework of petroleum reservoir studies integration is primarily concerned with the interaction of
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The Integrated and Multidisciplinary Industry Society of 2020
By K.H. BakerB015 The Integrated and Multidisciplinary Professional Society of 2020 Abstract Setting the Stage 1 First we start with definitions of integrated multi-disciplinary and the professional. The U.S. House Committee on Agriculture defines integration as “The combination (under the management of one firm) of two or more identical (horizontal) or successive (vertical) stages in the production or marketing process of a particular product. Generally the stages are capable of being operated as separate businesses. The firm that has management responsibility is called the integrator. The poultry industry for example is vertically integrated from production through processing and distribution. Diversification on the
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Should Future Shared Earth Model Be Knowledge-Driven Rather than Data-Driven?
Authors J.-F. Rainaud, M. Perrin, B. Zhu and S. SchneiderB017 SHOULD FUTURE SHARED EARTH MODELS BE KNOWLEDGE-DRIVEN RATHER THAN DATA-DRIVEN? 1 Abstract : The paper presents an alternative approach for Shared Earth Models whose ambitions is to share throughout the workflow the geological interpretation related to this model and not only geometrical and property representations of the objects included in a definite model. This approach could enable any user to take advantage of previous works done by others by producing updated extended or revised models possibly showing even drastic topological differences with the original ones. This new approach relies on a Geo-Ontology that captures the structural geologists’ expert knowledge
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From 3D Seismic Facies to Reservoir Simulation
Authors B. Vallès, A. Carrillat and L. SonnelandB018 FROM 3D SEISMIC FACIES TO RESERVOIR SIMULATION Introduction 1 B. VALLÈS A. CARRILLAT L. SONNELAND Nowadays the reservoir model building workflow is mainly divided into four steps: definition of the reservoir boundaries by interpreting the top and base horizons building a geologically structural model (layering faults etc) population of properties (porosity permeabilities…) by kriging or co-kriging for instance and then upscaling the model in order to get a reservoir model. This workflow requires a lot of manual efforts in particular the building of a structural model (Figure 1). The method described herein proposes a new approach that automates part
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Getting Rid of Stratigraphic Grids
Authors J.-L. Mallet, R. Moyen, T. Frank, L. Castanie, B. Leflon and J.-J. RoyerB019 GETTING RID OF STRATIGRAPHIC GRIDS Abstract 1 The implementation of any geostatistical method requires the use of a parametric coordinate system (u v t) such that (u v) corresponds to “horizontal” curvilinear coordinates tangent to the horizons while (t) corresponds to the “vertical” curvilinear axis approximately orthogonal to the horizons. So far common practice consists in covering the geological domain with a “structured stratigraphic grid” and then to use the (i j k) indexes as a sampling of the (u v t) coordinates. In this article we propose a completely different approach based on the recently introduced “GeoChron” model
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Effects of Geostatistical Heterogeneity on Lateral Flow Behavior
Authors E. Serpen, E. Laine and C.A. Ehlig-EconomidesB020 EFFECTS OF GEOSTATISTICAL HETEROGENEITY ON LATERAL FLOW BEHAVIOR E. SERPEN 1 * E. LAINE 2 AND C.A. EHLIG-ECONOMIDES 1 SUMMARY 1 Most oil reservoirs begin secondary production after primary production. In contract πproduction starts with waterflood. The π-production strategy accelerates oil recovery by quickly bringing the reservoir to peak production and by keeping the oil production rate constant until oil recovery reaches at least 50% of the initial oil in place. If water breaks through before 50% recovery then the water-injection rate is increased enough to maintain the constant oil rate. This study investigates the effect of geostatistically-simulated heterogeneous
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