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Papers
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Pressure Study of the North Sea Central Graben - Phase 2
Geophysical Prospecting, 2005, 53, 205213 Rock physics analysis for time-lapse seismic at Schiehallion Field, North Sea Mark Meadows,1 Don Adams,1 Rich Wright,2 Ali Tura,3 Steve Cole1 and David Lumley1 1 4th Wave Imaging Corporation, 16A Journey, Suite 200, Aliso Viejo, CA 92656, USA, 2 Memorial University, Newfoundland, Canada, and 3 Shell International E&P Received May 2004, revision accepted September 2004 ABSTRACT Rock physics analysis plays a vital role in time-lapse seismic interpre...
PaperMonday 10 May 2010 -
EAGE 2010 paper - Salt Plugging
Introduction Salt plugging of the prolific Buntsandstein reservoir has been the reason for failure for many wells in the salt-diapir prone areas of the Southern North Sea. In the past, as no methods existed that could account for shear forces when substituting pore-content between solids and fluids, qualitative approaches have been used based on careful interpretation, visual and neural-network wave-form analysis and classification, or amplitude-based assessments. Typically these studies were f...
PaperThursday 4 February 2010 -
EAGE 2009 paper: Petrophysical fracture identification for rock physics studies
Authors: Jun Yan, Liwei Lu, Rudi Lubbe and Simon Payne from Ikon Science Fractured carbonate reservoirs contain an important proportion of the worldâs hydrocarbon reserves and a qualitative and/or quantitative description of the fracture system is fundamental to petrophysical evaluations. Formation Micro Imager (FMI) or Formation Micro Scanner (FMS) logs aid in improving our understanding of fracture properties, but conventional logs are also still very useful as they can provide essential...
PaperTuesday 9 June 2009 -
EAGE 2009 paper: Developing the Rock Physics Model – Improved Carbon Dioxide Mixing Rules for Carbon Capture and Storage
Authors: J Roberts and S Brough of Ikon Science. Current energy policies focus on maximising current hydrocarbon resources and minimising carbon emissions. Consequently, fresh importance is placed on understanding the behaviour and properties of CO2 for the following reasons: a) CO2 is a natural constituent of hydrocarbon reservoirs. Concentrations vary from 2 - 80% and the presence of CO2 can greatly influence the hydrocarbon behaviour. b) CO2 is widely used for Enhanced Oil Recovery (EOR), ...
PaperTuesday 9 June 2009 -
Ikon Science and GeoPressure Technology white papers
View and read a selection of white papers written by Ikon Science and GeoPressure Technology.
PaperTuesday 24 March 2009 -
SEG 2008 paper: Seismic monitoring of CO2 geo-sequestration: realistic capabilities and limitations
Authors include Don Adams and Dave Markus of Ikon Science. Seismic is useful for monitoring and verification of subsurface geo-sequestration CO2 injection and storage projects. The physical properties of CO2-saturated rocks can vary strongly, thus the resulting seismic wavefield can be rich and complex, posing significant challenges to obtain accurate CO2 images and quantitative inversion results. We discuss the seismic rock and fluid properties of CO2-saturated rocks under various realistic ...
PaperTuesday 11 November 2008 -
EAGE 2008 paper: Log Quality Assessment and Data Correction for AVO
Authors: J. Yan (Ikon Science Ltd), R. Lubbe (Ikon Science Ltd), K. Waters (Ikon Science Ltd), N. Pillar (Ikon Science Ltd) & E. Anderson (Ikon Science Ltd) AVO modelling requires the relationships of porosity, shale, water saturation, mineral and fluid properties plus P and S-wave sonic and density logs, which in turn provide useful information for rock physics study. Despite modern logging developments, the bad quality of log data caused by borehole environment or mud-filtrate invasion is st...
PaperMonday 9 June 2008 -
EAGE 2007 paper: Variable Aspect Ratio Method in the Xu-White Model for AVO
Authors: J. Yan (Ikon Science Ltd), R. Lubbe (Ikon Science Ltd) & N. Pillar (Ikon Science Ltd) The variable aspect ratio method provides an important improvement in the application of the Xu-White model for sand-clay mixtures and allows for a variable aspect ratio log to be introduced into the Kuster and Toksöz model replacing the fixed aspect ratio assumption. This method has shown a significant improvement in predicting the velocities over the conventional Xu-White model resulting in a mor...
PaperMonday 11 June 2007 -
SEG 2003 paper: 4D seismic data processing issues and examples
Authors include Don Adams of Ikon Science Careful 4D time-lapse seismic data processing, both prestack and post-stack, avoiding the use of match filters, can greatly enhance the repeatability and interpretability of 4D seismic data. We demonstrate significant improvements to 4D results using our processing methods in examples from the North Sea and North America.
PaperSunday 26 October 2003 -
SEG 2003 paper: Estimation of reservoir pressure and saturations by crossplot inversion of 4D seismic attributes
Authors include Don Adams of Ikon Science. We present a method to simultaneously estimate pressure and saturation changes in a producing hydrocarbon reservoir using time-lapse (4D) seismic attributes. 4D seismic attributes are displayed in a crossplot domain, where pressure and saturation axes can be estimated deterministically or interpretively. These axes form the basis for a linear or nonlinear coordinate transformation to the pressure-saturation domain. A final calibration to production dat...
PaperSunday 26 October 2003