Case Histories

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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