Technical Papers Search ResultsCrosswell seismic imaging of acoustic and shear impedance in a Michigan reef
Mohamed Ibrahim (Fugro-Jason), and Wayne Pennington and Roger Turpening (Michigan Technological University)
Acoustic and shear impedance images, obtained from
deterministic simultaneous inversion of a high-resolution
crosswell seismic survey, were used to obtain the internal
structure of Niagaran reef in Michigan. The crosswell seismic
survey was conducted using two monitor wells external to
the reef. These wells had depths that extended beyond the
depth of the reef, and imaging used reflections from above
and beneath the reef, resulting in the best seismic images of
any Niagaran pinnacle reef obtained to date.
2010, RockTrace, Published Article 3D geological model for a gas-saturated reservoir based on simultaneous deterministic partial stack inversion.
I. Yakovlev, Y. Stein and A. Barkov (Gazprom VNIIGAZ) with K. Filippova* and S. Fedotov (Fugro-Jason)
3D seismic exploration data plays a significant role in the geological modelling workflow, since it is used not only to build a structural framework of productive layers and to define boundaries of different facial environments, but also to predict the lateral distribution of reservoir properties (lithology, porosity, etc.). This becomes of particular importance when dealing with offshore fields for which the lack of high quality borehole data is common.
2010, RockTrace, EMFT, Published Article Low Frequency Modeling and Uncertainty in Geostatistical Inversion
Mark Sams and Denis Saussus
Geostatistical inversion is used for building reservoir models that honour a wide range of input data and account for uncertainties in that data. Multiple realisations are generated to quantify that uncertainty. A significant amount of this input is deterministic and thus results in models with too little variation of the low frequency component from realisation to realisation. Increased variation between the realisations can be introduced geostatistically and set to reproduce the uncertainty expected from analysis of well data.
2010, StatMod MC, RockMod, Technical Article Quantitative Integration of Geology and Geophysics for Reservoir Modelling - A Case Study
M.S. Sams* (Fugro-Jason), I. Millar (Premier Oil Vietnam Offshore), W. Satriawan (Premier Oil Vietnam Offshore), D. Saussus & S. Bhattacharyya (Fugro-Jason)
Geology, rock physics and geophysics are combined quantitatively in a geostatistical inversion to produce reservoir models of a tidally influenced shoreline to deltaic environment. The impact of the geological facies probability volumes versus the seismic influence on the results can be estimated by comparing models with those produced using probabilities alone and with those using seismic inversion alone.
2010, StatMod MC, RockMod, Technical Article Updating Low Frequency Models
P.R. Mesdag (Fugro-Jason Netherlands BV), D. Marquez* (Fugro-Jason UK Ltd), L. de Groot (GdF Netherlands BV) & V. Aubin (GdF Netherlands BV)
Imprecise information about high contrast layers directly above the reservoir causes residual sidelobes and other artifacts within the reservoir, leading to incorrect imaging close to high contrast layers. We propose a method to update the P-impedance low frequency model in order to account for high contrast P-impedance layers. The updating methodology is integrated in an iterative inversion scheme in which, after a first pass inversion, information of a laterally variable high contrast P-impedance layers is interpreted and used to update the P-impedance low frequency model for a new run of the inversion. The result is a better imaging in zones close to high contrast layers.
2010, RockTrace, Technical Article Uncertainties in the quantitative interpretation of lithology probability volumes
Mark Sams and Denis Saussus (Fugro-Jason)
The interpretation of deterministic seismic inversion
results can be greatly enhanced through the generation of lithology probability cubes (e.g., Avseth et al., 2005). This is particularly true when there are more than two lithology types or when the inversion has produced estimates of P-impedance and S-impedance (or some combination of these).
2010, StatMod MC, RockMod, Published Article Detection and Delineation of This-Sand Sedimentary Sequences With Joint Stochastic Inversion of Well Logs and 3D Prestack Seismic Amplitude Data
German D. Merletti and Carlos Torres-Verdin, The University of Texas at Austin
Paper describes the successful application of a new prestack stochastic inversion algorithm to the spatial delineation of thin reservoir units otherwise poorly defined with deterministic inversion procedures. The new stochastic inversion yields spatial distributions of lithottype and elastic properties with a vertical resolution between 10-15m that accurately describe spatial trends of clinoform sedimentary sequences and their associated reservoir units.
2010, RockMod, Published Article Comparison of lithology and net pay uncertainty between deterministic and geostatistical inversion workflows
Mark Sams and Denis Saussus
Assessment of the uncertainty associated with net pay estimates can be made from inversion of seismic data, either using deterministic inversion followed by probabilistic interpretation, or directly with geostatistical inversion.
2010, FFP, RockTrace, RockMod, Published Article Models on the Mark
David Timko and Sumit Soni, Fugro-Jason
A Seismic to Simulation study was undertaken on the Aboozar field with the goal of optimizing and quantifying ultimate production from the field. The resulting simulation model achieved a 95% match against well data with minimal permeability modifiers and NO porosity modifiers.
2009, StatMod MC, EMFT, RockScale, JasonSTS, Case History Model Building
Denis Saussus
Using geostatistical inversion (pre or post-stack) builds superior geologic models for subsequent use in reservoir simulators. Topics include Quantitative Integration, Bayesian Inference, and Markov Chain Monte Carlo simulation.
2009, StatMod MC, RockMod, Technical Article Agile petrophysical analysis
Graeme Eastwood
Informed decisions in exploration and production begin with a good understanding of the subsurface. Placing the next well, how to maximise production or the best approach to secondary recovery – such decisions improve when supported by petrophysical evaluation. Time is a rare luxury in these decisions and, regardless of complexity, the analysis must be completed rapidly to be useful.
2009, PowerLog, RPM, Published Article UNDERSTANDING LATERAL RESERVOIR DEVELOPMENT THROUGH PARTIAL STACK SEISMIC FORWARD MODELING - CASE STUDY: “B” FIELD, NAM CON SON BASIN – VIETNAM
Wawan Satriawan and Ian Millar (Premier Oil Vietnam Offshore B.V.) and Leonard Lisapaly and Jimmy Ting (Fugro-Jason)
An AVA seismic forward modeling study was carried out with the objective of understanding the key contributors to amplitude response prior to further advanced processing such as Simultaneous Inversion work.
2009, E-Plus, RockTrace, EarthModel, Case History Extracting Detailed Lithology from Seismic Data
Kevin Jarvis, Fugro-Jason Australia, and Denis Saussus, Fugro-Jason Netherlands
Using a series of synthetic and real data examples, we will demonstrate how a geostatistical inversino algorithm can extract both lithology and elastic properties from angle-stack seismic data.
2009, RockMod, Technical Article GDF-SUEZ E and P Nederland B.V. Bases Reservoir Development on Advanced Reservoir Model: Seismic to Simulation Workflow Achieves 95% History Match without Porosity Modifiers
Alessandro Castoro and Rebecca Maguire, Fugro-Jason and Lex de Groot, GDF-SUEZ E&P Nederland B.V.
GDF-SUEZ teamed with Fugro-Jason to build a highly accurate, predictive reservoir model that incorporated all field data including seismic, wells and production history. This quantitative integration was expected to reduce uncertainty and enable better positioning of new wells. The outcome of the study was a new dynamic simulation model that honored all field data, reflected a disciplined workflow and was sufficiently fine-scale to predict the best locations for future drilling.
2009, JasonSTS, Published Article Interpretation and reservoir characterization of a field dominated by complex fluvial channels, Bohai Bay, China
QIUCHENG YE, XIAN-HUAN WEN, and MICHAEL G. GREENE, Chevron Asia-Pacifi c Exploration and Production Company, CHUNMING ZHAO, QINGHONG YANG, HONGTAO YAN, DONGMEI HOU, and LIRONG WANG, China National Offshore Oil Company Limited-Tianjin
Th e interpretation workfl ows presented in this paper were used to characterize and locate channel distributions. As a result, over 20 infill well locations were proposed and waterinjection selections were optimized so that each injection well could eff ectively penetrate multiple producing sands.
2009, Published Article Inversion and interpretation of a 3D seismic data set from the Ouachita Mountains, Oklahoma
Abuduwali Aibaidula1 and George McMechan2
Acoustic impedance inversion AI and simultaneous angle-dependent inversion SADI of a 3D seismic data set characterize reservoirs of Mississippian Morrowan age in the triangle zone of the frontal Ouachita Mountains, Oklahoma.
2009, RockTrace, Case History Successful Fluid Discrimination in Tight, Overpressured Reservoirs using AVO Inversion
Jan Rindschwentner, Nexus Energy, and Kevin Jarvis, Fugro-Jason Australia
A multi-disciplinary and interactive approach, guided by seismic inversion techniques and real-time petrophysical data, resulted in the successful planning and execution of the Longtom-3 and subsequently the Longtom-4 drilling and evaluation program.
2009, RockTrace, Case History Accurate Reservoir Modelling Through Optimized Integration Of Geostatistical Inversion And Flow Simulation. A North Sea Case Study.
A. Castoro 1, L. de Groot 2, D. Forsyth 2, R. Maguire 1, R. Rijkers 2, R. Webber 1 Fugro-Jason UK Ltd GdF Production Nederland B.V.
This paper describes the seismic to simulation workflow followed to create a fine-scale reservoir model for dynamic simulation. The workflow integrates all available geophysical, geological and engineering data and demonstrates advances in seismic inversion and integration with static and dynamic reservoir modelling. The results are used for reservoir characterisation, field monitoring and management.
2008, JasonSTS, Case History An Integrated Case Study from Seismic to Simulation through Geostatistical Inversion
S. SONI, SPE, D. TIMKO AND W. LITTMEN, FUGRO-JASON, AND H. KARKOOTI, S. KARIMI, S. KAZAMSHIROODI
This paper describes the iterative seismic to simulation workflow followed to create a fine scale reservoir static and dynamic simulation model consistent with all available engineering, geologic and geophysical data.
2008, JasonSTS, Case History AVO Interpretation in LMR Space: A Primer
Brian H. Hoffe* Fugro-Jason Canada, Calgary, Alberta, Marco A. Perez, Apache Canada Ltd., Calgary, Alberta, William Goodway, Encana Corporation, Calgary, Alberta
2008, RockTrace, Technical Article Comparison of uncertainty estimates from deterministic and geostatistical inversion
Mark Sams* and Denis Saussus, Fugro-Jason
Uncertainty in lithology distribution and net pay thickness can be estimated from seismic data through inversion. Deterministic inversion followed by probabilistic interpretation produces uncertainties that are similar to those derived directly from geostatistical inversion. The uncertainties from the deterministic approach are slightly larger than those from geostatistical inversion, with the biggest differences associated with thin layers that are beyond seismic resolution.
2008, StatMod MC, Technical Article Detailed Geological Model of Carbonate Reservoir Based on Geostatistical AVA-inversion - A Case Study
O. Rodina (Fugro-Jason), A. Rabey (Fugro-Jason), L. Makarova (Fugro-Jason), D. Neudachin (Pechoraneft) & J. Corballo (West Siberian Resources Ltd.)
This study demonstrates how geostatistical AVA-inversion workflow was used to obtain reservoir properties and risk assessment of the Lekharyaga prospect area.
2008, RockMod, Case History Estimation of Hydrocarbons-in-place by Simultaneous (AVO) Inversion, constrained by iteratively derived low frequency models
Phil Hughes, Robert van Eykenhof, Peter Mesdag. Fugro-Jason AS, PO Box 8034, 4068, Stavanger, Norway.
In this study from offshore Norway, a 3D PSTM survey has been inverted for P-impedance and Vp/Vs. The aim of the inversion was to improve the interpretation of top reservoir, to estimate fluid content and to calculate pore volume.
2008, RockTrace, Technical Article New Iterative Approach Makes Compelling Case for Reservoir Modeling
Sumon Bhattacharyya
A revolutionary new dynamic workflow is now possible, saving time over existing approaches and allowing operators to keep up with drilling schedules. New operational data and revised interpretations, such as a new well or a recently discovered fault, are easily incorporated into the model at any point in the workflow in a matter of minutes.
2008, EMFT, Published Article Oseberg South PP-PS Joint (AVA) inversion
Maciej Niebuda* ‘Fugro- Jason AS’, Peter Mesdag ‘Fugro-Jason’, Jim Daniels ‘StatoilHydro’
In this paper, we describe the Joint AVA inversion of multi-component ocean-bottom cable (OBC) data at Oseberg South, operated by StatoilHydro. The primary objective of the study was to discriminate between the main lithologies within the Ness formation (sands, shales and stacked coals), and specifically to delineate the sandy fluvial channel facies.
2008, RockTrace-PS, Case History Overcoming Seismic Attenuation Caused By Shallow Gas Above At A Gas Field Offshore Indonesia To Quantitatively Characterize The Reservoir Through Simultaneous Inversion
Cecep W. Rudiana* Bambang Irawan* Denny Sulistiono** Mark Sams**
The result shows that lateral varying wavelets can compensate for the shallow gas effect in the seismic data, and reduce the uncertainty of the seismic inversion modeling for reservoir characterization.
2008, RockTrace, Case History Reservoir Characterization beneath Shallow Gas Disturbances
M.S.Sams* Fugro-Jason
Seismic data are used to map both the structure and stratigraphy of reservoirs. Shallow gas in the form of gas chimneys and gas filled channels can seriously disturb the seismic data at reservoir level leading to significant difficulties in determining the reservoir distribution let alone the more quantitative aspects of the reservoir properties.
2008, StatMod MC, Technical Article Super Seismic
Eric Adams
Eric Adams discusses keys to success in seismic-to-simulation workflows.
2008, Published Article A comparison of porosity estimates obtained using post-, partial-, and prestack seismic inversion methods: Marco Polo Field, Gulf of Mexico.
G. Russell Young* and Mrinal K. Sen, The Institute for Geophysics at The University of Texas at Austin
In this study, we invert a single seismic data set with deterministic post-, partial-, and prestack seismic inversion algorithms and transform the estimated elastic parameters into porosity to characterize Miocene reservoirs in Anadarko's deepwater Marco Polo Field.
2007, RockTrace, Case History Estimating Uncertainty in Reserves from Deterministic Seismic Inversion
M.S. Sams* (Fugro-Jason (M) Sdn. Bhd.) & D. Saussus (Fugro-Jason)
We present a methodology for deriving uncertainty estimates of rock and fluid distributions for qualitative and quantitative interpretation of deterministic seismic inversion data. The method integrates rock physics modelling with geostatistical forward modelling to provide a basis for interpretation of elastic properties from seismic inversion.
2007, StatMod MC, Technical Article Progressive Interactive Modeling Delivers Fast, Reliable Answers to Key Reservoir Questions
Sumon Bhattacharyya
A new approach easily incorporates ongoing operational data, such as a new well or a recently discovered fault, into the model. The additional information can be easily inserted into the reservoir model at any point in the workflow.
2007, Published Article Reservoir compartment prediction of the Simpson field from the geostatistical inversion of AVO seismic data
Kevin Jarvis Amanda Folkers Denis Saussus
The analysis of the realizations output from the geostatistical inversion led to improved reservoir volumetric calculations and the identification of highly probable shale barriers.
2007, RockMod, Technical Article Rock Physics and Petrophysics Integration as part of a Seismic Reservoir Characterization Workflow
Mark S Sams Fugro-Jason
This paper highlights the issues concerning the uncertainties in the processes of petrophysics, rock physics and synthetic to seismic well tie and illustrates how integration of petrophysics and rock physics can impact the final reservoir model.
2007, RockTrace, Technical Article Seismic Inversion as an Exciting Tool to Delineate Facies Distribution in Tiaka Carbonate Reservoirs, Sulawest - Indonesia
Deddy Hasanusi* Erham Adhitiawan* Anies Baasir* Leonard Lisapaly** Robert van Eykenhof**
In order to reduce the risk for the future drilling plan, and to get a better understanding of the lateral facies distribution of reservoirs in the field, a constrained sparse spike inversion was applied to convert the 2D full-stack seismic data recorded in the area into 2D acoustic impedance lines, calibrated to the existing wells.
2007, InverTrace, Case History The quest for the low frequencies in pre-stack inversion
William R. PILLET* (TOTAL E&P CSTJF Pau), Emmanuelle BRECHET (TOTAL E&P Angola), Peter MESDAG (Fugro-Jason Netherlands BV), Marina FEROCI (Fugro-Jason UK)
This paper presents successively the initial pre-stack inversion results of the high resolution data, those of the post-processed HR and finally the results of the inversion combining the conventional and HR surveys.
2007, RockTrace, Case History Tightly Integrating Petrophysics, Rock Physics In Single Model Generates Improved Results
Jeff Baldwin
A tight integration offers significant value in both reduced uncertainty and improved field performance. By adopting tight integration, operators can reduce risk, improve process efficiency, enhance overall production and increase the return on economic assets.
2007, PowerLog, Published Article Time Lapse Simultaneous Inversion at Girrassol Field, Offshore Angola
Fugro-Jason
Full band-width simultaneous inversion was performed on a base and two monitor surveys over the Girassol field, offshore Angola. Careful calibration of the low frequency models of the elastic properties for the base survey was performed to identify the reservoir away from well control.
2007, RockTrace-4D, Case History Hydrocarbon Prediction Through Simultaneous Inversion Reduces Exploration Risk for the Flag Sandstone
FOLKERS, AMANDA, Apache Energy Ltd., Perth, Australia; KEVIN JARVIS, Fugro-Jason Australia BV, Perth, Australia
The known oil and gas fields in the Early Cretaceous Flag Sandstone in the Barrow Sub-basin of the Carnarvon Basin offshore NW Australia are approaching depletion and the objectives of near-field exploration are to prove up additional reserves and maximize utilisation of existing production infrastructure.
2006, RockTrace, Case History Integrating Well and Seismic Data for Reservoir Characterization: Risks and Rewards
Kevin Jarvis, Fugro-Jason Australia BV
In this paper, I discuss one of the ways that well and seismic data can be combined to form a reservoir model. A logical workflow is proposed that consists of a systematic progression from well data analysis, to rock physics analysis, to seismic inversion and finally reservoir property estimation.
2006, RockTrace, Technical Article Seismic Inversion - A Critical Tool in Reservoir Characterization
John Pendrel
The principle objective of seismic inversion is to trarnsform seismic reflection data into a quantitative rock property, descriptive of the reservoir. In its most simple form, acoustic impedance logs are computed at each CMP. Compared to seismic amplitudes, inversions show higher resolution and support more accurate interpretations.
2006, Published Article Seismically Constrained Petrophysics in the Scarborough Area
F. Hasan Sidi Ata Ilahi Guy Duncan, Fugro-Jason Australia, Fugro-Jason Australia, BHP Billiton Petroleum
In this paper, we discuss how we arrived at a seismically constrained petrophysical interpretation in the Scarborough gas field in the Exmouth Sub Basin, offshore North West Australia.
2006, RockTrace, Case History Combined Geostatistical Inversion and Simultaneous AVA Inversion: Extending the Life of a Mature Area, Kotabatak Field, Central Sumatra Basin, Indonesia
Matthew H. Hoehn, Ibnu Arif, Chris Welch, F. Hasan Sidi, Djoko Rubyanto, Robert van Eykenhof, Mark Sams, Yudi Prasetyo
The high-resolution geostatistical simulation results of Kotabatak have provided an effective interpretation framework that assists detailed sequence stratigraphic mapping and information on reservoir quality. Recent new well log information confirms the results.
2005, StatMod MC, Case History Enhancing Consistency Between Geological Modeling and Seismic Pre-Stack Amplitude Inversion with Pseudo-Wells: An Example from the Gendalo Field
David Glenn* Eduardo Berendson** Febry Hariyannugraha* Chris Skelt*** Rhys Schneider* Leonard Lisapaly**** Khristina Kirschner* Robert van Eykenhof**** Skip Walden* Mark Sams**** Steve Smith*
Integration of a low frequency model during seismic inversion enhances the qualitative and quantitative interpretation level of inversion results.
2005, RockTrace, Case History High resolution brings new insight into connectivity, reservoir size, sand quality
Carlos Torres-Verdin, Tim Fasnacht
By using a novel approach that ties pre-stack seismic and well log data, our team has built a uniquely detailed 3D model of Anadarko’s Marco Polo fi eld, leading to a better understanding of the vertical and lateral extent as well as the quality of the reservoir.
2005, StatMod MC, Published Article Joint AVO Inversion with Geostatistical Simulation
Miles Leggett*, William Chesters** (*Fugro-Jason Calgary, **Fugro-Jason Netherlands)
The use of both AVO and Geostatistical Simulation methods in Reservoir Characterization have become widespread over the past few years within the oil industry, with varying degrees of success, for use in Exploration, Appraisal and Development stages. Combining Geostatistical Simulation of reservoir properties with seismic data has been successfully achieved through the use of Geostatistical Inversion. Although successful, more benefit can be achieved by directly combining AVO information, via seismic angle or offset stacks, with Geostatistical Inversion, using a novel AVO inversion algorithm. This will be demonstrated with field examples.
2005, RockMod, Technical Article Joint Stochastic Inversion of Petrophysical Logs and 3D Pre-Stack Seismic Data to Assess the Spatial Continuity of Fluid Units Away from Wells
A. Contreras and C. Torres-Verdin, The University of Texas at Austin, W. Chesters and K. Kvien, Fugro-Jason Rotterdam, and M.Globe, Anadarko Petroleum Corporation
This paper describes a novel methodology to integrate well logs and 3D pre-stack seismic data. The objective is to assess lateral continuity and spatial extent of lithology and fluid units penetrated by a well.
2005, RockMod, Case History Longtom - Confirmation of a New Play in Offshore Gippsland
K. P. Lanigan, G. Bunn, and J. Rindschwentner
The study was based upon the inversion of Pre-Stack Time Migrated Gathers from a long-offset/high-angle seismic survey over the prospect. The goal was to recover density information as well as the more common elastic parameters P-Impedance and Vp/Vs.
2005, RockTrace, Case History A Case Study of Inversion of Long Offset P-Wave Seismic Data into Elastic Parameters
R. ROBERTS, J. BEDINGFIELD, Y. GUILLOUX, M. CARR, P.MESDAG
The study was based upon the inversion of Pre-Stack Time Migrated Gathers from a long-offset/high-angle seismic survey over the prospect. The goal was to recover density information as well as the more common elastic parameters P-Impedance and Vp/Vs.
2004, RockTrace, Case History Alpine Field Simultaneous Angle Dependent Inversion
Petroleum Corp.; Renee Hannon and Doug Knock, ARCO Alaska Inc.
Simultaneous angle dependent inversion (SADI) was performed on three angle stacks from the Alpine Field. Additionally, post-stack inversion was carried out on the near angle stack (using P-impedance log data) and on the far angle stack (using elastic impedance). The results of the work helped interpreters better characterize the distribution of the reservoir in the field and was used to facilitate well planning and reserves estimation.
2004, RockTrace, Case History AVA sensitivity analysis and inversion of 3D pre-stack seismic data to delineate a mixed carbonate-siliciclastic reservoir in the Barinas -Apure Basin, Venezuela
Arturo Contreras* and Carlos Torres-Verdín, The University of Texas at Austin
A detailed AVA sensitivity analysis was conducted to assess the nature of AVA effects in the study area. Such study included cross-plot analysis, Biot-Gassmann fluid substitution, AVA reflectivity modeling, and numerical simulation of synthetic gathers.
2004, RockTrace, Case History Combined Reservoir Characterization and Modeling
R.B. SIMONO1, M.J. MASHAYEKHI1, R. MORTON2, P. CROOKALL2, B.VOS3, P. VAN DER MADE3
This paper presents a combined reservoir characterization and modeling workflow for a producing field in the southern Persian Gulf. A cornerstone of the process is tight integration of geostatistical inversion with the upscaling and geocellular model construction.
2004, StatMod MC, Case History Keeping a Giant on its Feet. Dedicated Geophysics Assists Britannia Field Development
Adrian Burrows, RPS Troy-Ikoda, Presenter & Co-author Dean Criddle, Britannia Field Development1, Author Co-authors: Karl Kaiser, John Colleran, Cristina Angheluta, Fugro-Jason
Development drilling at Britannia has until recently targeted what were perceived as lower geologic-risk areas around the subsea and platform drilling centres. A major challenge is to evaluate the development potential of the outlying areas away from these primary production facilities.
2004, RockTrace, Case History Production Assessment of Reservoir Models Constructed with the Use of 3D Seismic Data
GAMBUS, M. AND TORRES-VERDÍN, C. Department of Petroleum and Geosystems Engineering, The University of Texas at Austin
This paper describes a study undertaken to appraise spatially complex hydrocarbon reservoir models constructed with the use of 3D post-stack seismic data and well logs.
2004, RockMod, Technical Article Quantifying Uncertainty in Reservoir Properties Using Geostatistical Inversion at the Holstein Field, Deepwater Gulf of Mexico
Claire Sullivan*, Eric Ekstrand, Tom Byrd, Donald Bruce, BP, Mark Bogaards, Ron Boese, Peter Mesdag, Fugro-Jason
We discuss how geostatistical inversion results allowed new methods of computing seismic net pay and net-to gross into our toolkit, delivered a better match to geologic models through higher resolution and added value by providing the flexibility of evaluating different probabilistic scenarios.
2004, StatMod MC, Case History Reservoir Characterisation of the Flag Sandstone, Barrow Sub-basin, Using an Integrated, Multi-Parameter Seismic AVO Inversion Technique
Kevin Jarvis (Fugro-Jason), Amanda Folkers (Apache Energy Ltd), Peter Mesdag (Fugro-Jason)
An integrated, multiparameter seismic AVO inversion technique was utilised that improved the mapping of the Flag Sandstone and identified the presence of trapped hydrocarbons.
2004, RockTrace, Case History Reservoir Characterization and Modeling of Thin Beds in a Deep Water Gas Field, Offshore India
R. Bastia1, B. Das1*, M. Acharya1, P. Gabriels2, M. Sams2, P. Mesdag
This paper focuses on the inclusion of the finely laminated sands through the integration of high resolution petrophysical data with seismic data. This integration of data with very different vertical resolutions was achieved through rock physics modeling.
2004, StatMod MC, Case History Seismic Facies Analysis for Fluvial Depositions Characterization, the Fergana Valley Example
T.L. BABADZHANOV, R.LARIJANI, G. SHILOV, À. AHVERDIEV AND À. RYKOV
To illustrate such seismic facies analysis this paper presents the results of a study of the deep oil and gas field in the Fergana Valley, a mega-syncline inside of the Tyan-Shan zone, Uzbekistan.
2004, RockTrace, Case History Geostatistical Inversion for the Lateral Delineation of Thin-Layer Hydrocarbon Reservoir: A Case Study in San Jorge Basin, Argentina
German Miletti and Julio Hlebszevitsch, Repsol-YPF and Carlos Torres-Verdin, University of Texas at Austin
This paper reports on the experience gained with a pilot project aimed at quantifying the value of geostatistical inversion for the detection and delineation of thinly bedded hydrocarbon reservoirs.
2003, StatMod MC, Case History Impedance Inversion in a Structurally Complex Carbonate Environment, Abu Dhabi, UAE Case Study
W.L. Soroka, M. Shoemaker, A.M. Gombo
Post-stack seismic inversion to acoustic impedance was successfully performed on a 3D seismic volume over a large carbonate field using an integrated iterative inversion workflow.
2003, InverTrace, Case History Integrated AVO Reservoir Characterization and Time-Lapse Analysis of the Widuri Field
PETER MESDAG1, ROBERT VAN EYKENHOF2, BILL HARMONY3, LUPI HARVIDYA3, MARK SAMS4 and PAUL VAN RIEL1 1Jason Geosystems, PO Box 598, 3000 BN Rotterdam, The Netherlands 2Jason Geosystems Asia 3CNOOC SES Ltd 4Jason Geosystems Asia
To investigate and characterize fluid movement, a novel workflow involving joint simultaneous inversion of baseline and monitor seismic AVO data was applied. The results from the time lapse AVO inversion confirm the hypothesis based on production history analysis that aquifer support comes from the southeast.
2003, RockTrace-4D, Case History Integration of Time-Lapse Seismic and Production Logging Data: Jotun Field, Norway
David. H. Johnston* and Wences P. Gouveia (ExxonMobil Exploration Company); Arne Solberg and Morten Lauritzen (Esso Norge as)
Combined with integrated reservoir facies interpretations and with other production data, the 4D data successfully derisked several proposed infill well locations and has identified new workover candidates and drilling opportunities in the field.
2003, InverTrace, Case History On the Inversion of Time-Lapse Seismic Data
Sudipta Sarkar*, Earth Resources Laboratory, Massachusetts Institute of Technology, Wences P. Gouveia and David H. Johnston, ExxonMobil Upstream Research Company
In this paper, we present elastic models (P- and S-wave impedance and density) obtained from the inversion of synthetic 4D angle stacks. Finally, even though the inversion is applied to entire 3D volumes of time-lapse stacks, we concentrate on and present results for a single cross-section.
2003, RockTrace-4D, Technical Article Porosity and lithology prediction at Caballos Formation in the Puerto Colón Oil Field in Putumayo (Colombia)
HORACIO ACEVEDO, Ecopetrol, Bogotá, Colombia, WAYNE D. PENNINGTON, Michigan Technological University, Houghton, Michigan, U.S.
This study presents the results of a seismic inversion analysis and interpretation of the Acae-3D seismic volume.
2003, RockTrace, Published Article Seismic Elastic Inversion of a Cretaceous Oil field in the Campos Basin, Brazil
Edgar Ambrosini Thedy, Alfredo Pereira Grell, Guenther Schwedersky Neto, Petrobras, Jim Thom, Jason Geosystems
One of the main difficulties of the interpretation in this field was to distinguish the porous sandstones from the low velocity shales. Log analysis indicated separating the two lithologies would be possible. Volumes of P and S wave impedances were generated and elastic parameters derived alowed better quality reservoir characterization.
2003, RockTrace, Case History Time-Lapse Simultaneous AVO Inversion of the Widuri Field, Offshore SouthEast Sumatra
Bill Harmony* Robert Van Eykenhof*** Lupi Harvidya* Djoko Rubyanto*** Sri Lestari Supardi* Mark Sams**** Fauzi Alkatiri* Paul Van Riel** Peter Mesdag**
To investigate and characterize fluid movement, a novel workflow involving joint simultaneous inversion of baseline and monitor seismic AVO data was applied. The results from the time lapse AVO inversion confirm the hypothesis based on production history analysis that aquifer support comes from the southeast.
2003, RockTrace, Case History Acoustic Impedance Interpretation for Sand Distribution Adjacent to a Rift Boundary Fault, Suphan Buri Basin, Thailand
S. Ronghe and K. Surarat
This article reports on a seismic inverse modeling study from an oil-producing field in the Suphan Buri basin, Thailand.
2002, InverTrace, Case History Development of a High Resolution 3D Reservoir Flow Model of the Bierwang Gas Storage Field
J. HOELLWART, J.HABERLAND, S. VAN DELDEN, F. KLOAS, R. PEVERARO, R.LARIJANI, Y. CHARREYRON, A. SEMENTSOV, P.TIJINK, F. LINDEMAN and P. VAN RIEL
To obtain a better understanding of the storage performance of the field, Ruhrgas acquired 3D seismic data and has undertaken a full field integrated geostatistical modeling study to obtain high resolution reservoir flow models. These models form the basis for dynamic modeling.
2002, InverTrace, Case History Estimation of Net-to-Gross from P and S Impedance in Deepwater Turbidites
L. Vernik and D. Fisher, BP GOM Deepwater Production, Houston, Texas, U.S., S. Bahret, Jason Geosystems
The limitations of using low-ferquency 3-D seismic datea for detailed reservoir characterization are well recognized. Nonetheless, these data are very well suited for quantitative estimates of the net-to-gross, which is a reservoir scale property critical in deepwater turbidite reservoir characterization and development projects.
2002, RockTrace, Published Article Fluid and Lithology Identification Using Simultaneous Angle Dependent Inversion, Burgos Basin, Mexico
V. Mercado H., R..M. Uribe C., J. Méndez de León, PEMEX, E. Francucci, F. Fernández-Seveso, L. Piccioni, D. Graham , JASON GEOSYSTEMS
This work presents the results of the simultaneous angle dependant seismic inversion applied to identify and delineate gas charged reservoirs in the study area, Burgos Basin, Mexico. This methodology, along with the hydrocarbon system analysis, substantially reduces the risk of exploratory and development well locations.
2002, RockTrace, Case History From seismic to simulator through geostatistical modelling and inversion: Makarem gas accumulation, Sultanate of Oman
G. Shanor, M. Rawanchaikul & M. Sams from Jason Geosystems Middle East and R. Muggli, G. Tiley & J. Ghulam from Petroleum Development Oman
This paper presents an applied workflow and the results of an integrated team effort to define the commercially recoverable reserves associated with the Buah fractured carbonate reservoir of the Makarem sour-gas accumulation in the Sultanate of Oman.
2002, JasonSTS, Published Article Integrated Seismic and Subsurface Characterization of Bonga Field, Offshore Nigeria
MARK CHAPIN, PETER SWINBURN, RAPHIC VAN DER WEIDEN, DIETER SKALOUD, SOLA ADESANYA, DAVID STEVENS, CHRIS VARLEY, and JACOB WILKIE, Shell Deepwater Services, Houston, Texas, U.S., ERIC BRENTJENS, Shell Nigeria Exploration and Production Company, Lagos, Nigeria, MARTIJN BLAAUW, Jason Geosystems, Rotterdam, The Netherlands
The development of Bonga Field is presented as an example of integrated subsurface modeling of complex, deepwater channel reservoirs in which geophysical techniques are highlighted. Three main static reservoir parameters were modeled in detail: net sand distribution, subseismic
2002, RockTrace, Published Article Geostatistical Lithology Modeling
Mark Sams, Fugro-Jason
Using geostatistics to combine seismic and geological information for generation of detailed litholgy models.
2001, StatMod MC, Technical Article Adding Value to Impedance Models Through Sequence Stratigraphy
Z. Marzuki, Petronas Carigali, M.S. Sams, Jason Geosystems, and D. Atkins, Jason Geosystems
A case study from a maturing oil field shows how integrating data within a common sequence stratigraphic framework approach can lead to the improved understanding of the distribution of fluids and reservoir properties.
2001, InverTrace, Case History Chestnut Well Planning using Elastic Impedance of 4C Seismic Data
J.E.F. STEARN, A. CASTORO and R. BACKHOUSE
The difficulty in appraising the Chestnut Field is due to a lack of acoustic impedance contrast between the oil-bearing Nauchlan Sandstone and the enveloping Shales, rendering it almost transparent to conventional P-wave seismic data gathered via a towed streamer.
2001, RockTrace-PS, Case History Seismic Inversion - The best tool for reservoir characterization
John Pendrel, Jason Geosystems Canada
In various forms, seismic inversion has been around as a viable exploration tool for about 25 years. This article briefly discusses inversion techniques in a somewhat qualitative manner, keeping the equations to a minimum. After all, it is drilling results which count and against which any algorithm will ultimately be measured.
2001, Published Article Sequence Stratigraphy and Seismic Impedance: A New Approach to Reservoir Characterization
DAVID R. ATKINS*, MAI WILSON*, AND MARK S. SAMS**
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.
2001, RockTrace, Technical Article Turbidite Reservoir Characterization: Multi-Offset Stack Inversion for Reservoir Delineation and Porosity Estimation: a Gulf of Guinea Example
Dominique Dubucq*, TotalFinaElf , Pau, France; Sito Busman and Paul Van Riel , Jason Geosystems, The
Amplitude inversion is widely used to enhance seismic resolution and discriminate reservoir from non-reservoir by applying a cut-off on the computed impedance.
2001, RockTrace, Case History Improving the Static Model of a Complex Reservoir through the Inversion of Seismic Data
Zakaria B Marzuki, Petronas Carigali Sdn. Bhd., Mark S. Sams and Dave Atkins, Fugro-Jason
A number of static models that include the seismic data
and those based on log data alone have been compared for an
oil field from the Malay basin. Significant differences in
volumetric estimates were found. These differences were
caused by the variations in sand quality across the field that
were misrepresented when the seismic data were not used.
2000, InverTrace, StatMod MC, EarthModel, 4C Seismic Data and Reservoir Modeling at Alba Field, North Sea
R.. Hanson*. M. MacLeod, C. Bell, Chevron U.K.Ltd, R. Behrens, Chevron Petroleum Technology Co. P. van Riel, Jason Geosystems
In this paper, we first overview the data, techniques, and studies used to justify the 3-D OBC survey. Next, we present images of the new OBC and reprocessed streamer seismic data that show 4-D, AVO, and converted-wave results. Finally, we suggest a new, preliminary interpretation of the Alba reservoir that is supported by two recently drilled wells.
2000, RockTrace, Case History A Recipe for Integration
Mark Sams of Jason Geosystems Asia, Paul van Riel of Jason Geosystems
In the exploration for and the development and production of hydrocarbons, multi-disciplinary teams work together to optimise resource recovery. The degree of integration, and thus the value added, will depend on how the integration is achieved. Maximum integration is reached if all disciplines focus on the construction of a unified model.
2000, Published Article Alpine Oil Field: Geophysics from Wildcat to Development
*Dean Gingrich, ARCO Alaska Inc.; Daniel Hughes, Union Texas Petroleum; Kevin Martindale, Anadarko Petroleum Corp.; Milos Savic and Arcangelo Sena, ARCO Technology and Services; Diane Kerr, Anadarko Petroleum Corp.; Renee Hannon and Doug Knock, ARCO Alaska Inc.
The Alpine Oil Field will begin production during the third quarter 2000. The exploration and subsequent development efforts have relied heavily on several geophysical methods and integrating these data with the geological and engineering data sets. Several of these methods and their impact on the exploration and development effort will be reviewed.
2000, RockTrace, Case History An Interpreters Guide to Understanding and Working with Seismic-Derived Acoustic Impedance Data
REBECCA BUXTON LATIMER and RICK DAVISON, Jason Geosystems, Houston, Texas, U.S., PAUL VAN RIEL, Jason Geosystems, Rotterdam, The Netherlands
Inversion of seismic data into acoustic impedance (AI) is a rapidly growing field, due primarily to the ease and accuracy of interpretation of the impedance data.
2000, Published Article Comparison of constrained sparse spike and stochastic inversion for porosity prediction at Kristin Field
JAN HELGESEN, INGRID MAGNUS, SARAH PROSSER, GIRISH SAIGAL, and GEIR AAMODT, Saga Petroleum ASA, Sandvika, Norway, DAVID DOLBERG, Mobil Exploration Norway, Stavanger, Norway, SITO BUSMAN, Jason Geosystems Bv, Rotterdam, The Netherlands
2000, Published Article Elastic Impedance Inversion in Practice
*Milos Savic, ARCO British Ltd., Bruce VerWest, ARCO British Ltd., Ron Masters, ARCO Exploration, Arcangelo Sena, ARCO Exploration, and Dean Gingrich, ARCO Alaska Inc
Reservoir characterization should integrate all available seismic, petrophysical and geological information into the volumetric distribution of reservoir properties like porosity, permeability and saturation.
2000, RockTrace, Technical Article Estimation and Interpretation of P and S Impedance from Simultaneous Inversion of P-wave Offset Seismic Data
John Pendrel, Jason Geosystems, Canada*; Harry Debeye and Radmila Pedersen-Tatalovic, Jason Geosystems B.V., The Netherlands; Bill Goodway and Jocelyn Dufour, PanCanadian Petroleum Ltd.; Mark Bogaards, Jason Geosystems; Robert R. Stewart, The University of Calgary
Using the simultaneous inversion results, we are able to achieve the desired discrimination by exploiting the contrast in sandstone-shale rigidity.
2000, RockTrace, Case History Quantifying Fluid Prediction Using Angle-Dependent Inversion Measured Against Log Fluid Substitutions
James W. Anderson, Mariner Energy Inc., and Mark A. Bogaards, Jason Geosystems Inc
A Bright spot prospect was identified using 2D and 3D seismic. Due to the isolation of this prospect from existing infrastructure it is critical to be able to predict the type of hydrocarbon likely to be present.
2000, RockTrace, Technical Article Simultaneous Inversion of the Ladybug Prospect and Derivation of a Lithotype Volume
Jim Fowler* and Mark Bogaards, Jason Geosystems; Gale Jenkins, Texaco Worldwide Exploration and Production, Inc.
It was determined that the Simultaneous Inversion methodology extracts a more dynamic range of information from offset seismic stacks, and results in an improved response to reservoir identification and mapping over that of traditional seismic AVO analysis.
2000, RockTrace, Case History The Past, Present and Future of Quantitative Reservoir Characterization
PAUL VAN RIEL, Jason Geosystems, Rotterdam, The Netherlands
In the E&P business, by far the largest component of geophysical spending is driven by the need to characterize (potential) reservoirs. The simple reason is that better reservoir characterization means higher success rates and fewer wells for reservoir exploitation ... and that increased investments in subsurface work are paying off in an overall reduction in E&P cost.
2000, Published Article Stochastic Inversion for High Resolution Reservoir Characterisation in the Central Sumatra Basin
M.S. Sams, Jason Geosystems Asia, D. Atkins, Jason Geosystems Asia, N. Said, P.T. Caltex Pacific Indonesia, E. Parwito, P.T. Caltex Pacific Indonesia, P. van Riel, Jason Geosystems bv
Stochastic inversion with lithology simulation is a
powerful tool for integrating a wide variety of data -
geological, geophysical, petrophysical and statistical - to
produce constrained, detailed models of reservoirs. These
models can be used for static or dynamic modelling. The
technique is well suited to mature fields such as those in the
Central Sumatra Basin, where the objectives are to find
bypassed reserves and optimise well planning for secondary or
tertiary recovery.
1999, StatMod MC, Case History Elastic Impedance
PATRICK CONNOLLY, BP Amoco, Houston, Texas, U.S.
As might be expected, ekastic impedance is a function of P-wave velocity, S-wave velocity, density, and incidence angle. To relate EI to seismic, the stacked data must be some form of angle stack rather than a constant range of offsets. There are several ways of constructing suitable data sets by either careful mute design or by linear combination of intercept and gradient functions.
1999, RockTrace, Published Article Multi-Component Seismic Interpretation: Data Integration issues, Alba Field, North Sea
R. Hanson*, M. MacLeod, and C. Bell, Chevron U.K. Ltd, C. Thompson, Chevron Petroleum Technology Company (presently with Norsk Chevron A/S), J. Somod, Saga Petroleum U.K. Ltd.
This paper focuses on the use of multicomponent seismic data for improved structural imaging of the Alba field.
1999, RockTrace-PS, Case History The Alba Field Ocean Bottom Cable Seismic Survey: Impact on Development
M. K. MACLEOD, R. A. HANSON, and C. R. BELL, Chevron UK Ltd., Aberdeen, Scotland, S. MCHUGO, Schlumberger Oil Field Services, Gatwick, England
With the first well being drilled less than a year after seismic acquisition started, the new data arrived in time to make a significant commercial impact on the field’s development. We hope our results at Alba will cause further development and more widespread use of this exciting new technology.
1999, RockTrace-PS, Published Article Interpreting Sand Channels from 3C-3D Seismic Inversions
JOHN PENDREL1, ROBERT R. STEWART2 and PAUL van RIEL3
Shear waves can provide vital lithologic information, especially in combination with traditional P-wave seismic data or when P-wave sections contain ambiguities.
1998, RockTrace-PS, Case History Effect of Well Control on Constrained Sparse Spike Seismic Inversion: A Western Canadian Reef Example
JOHN PENDREL AND PAUL van RIEL
Modern seismic inversion methods transform seismic reflection data to pseudo acoustic impedance logs. Inherent in this approach is an integration of low frequency model information with higher frequencies from the seismic.
1997, InverTrace, Case History Seismic Inversion for reservoir characterization and well planning in the Snorre Field
DAG HELLAND-HANSEN, INRID MAGNUS, ATLE EDVARDSEN, and EGIL HANSEN, Saga Petroleum ASA, Sandvika, Norway
The impedance values of the non-reservoir lithologies significantly overlap those of the reservoir sands, causing problems in the use of impedance to predict reservoir sands. Jason Geosystem (with support from Statoil, Norsk Hydro, and Saga Petroleum) created a new inversion scheme (InverMod) to overcome this challenge.
1997, Published Article Using Geophysical, Geological and Petrophysical Data to Characterize Reservoirs in the North Sea
J.J.M. Buiting and Mike Bacon
To optimise the understanding of reservoirs it is necessary to combine geophysical, geological and petrophysical measurement and knowledge.
1997, InverTrace, Technical Article Integrated Seismic Reservoir Characterization and Modeling: A Gulf of Mexico 3D Case History
REBECCA B. LATIMER AND PAUL van RIEL
Following a quantitative workflow through a Gulf of Mexico 3D case study shows how the reservoir’s stratigraphic and lithologic properties are more accurately determined than would be possible with standard seismic interpretation and seismic attribute analysis.
1996, InverTrace, Case History 97 matches
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