Recent Additions

• Pre-stack Stochastic Seismic Inversion of Brenda Field
  Joint AI-GI stochastic seismic inversion was performed for 100 pairs of equi-probable AI-GI realizations over the Brenda field, which is located in block 15 in the North Sea. Stochastic inversion enables the possible variability in impedance, and hence the uncertainty in lithology and fluid classification, to be explored. These can be represented using probability and connected probability volumes calculated using joint AI-GI thresholds.
  
  
  This paper, by Graham Hicks and Ashley Francis, will be presented at the EAGE 69th Conference & Exhibition, London, UK, 11 - 14 June 2007, and describes a case study of the application of pre-stack stochastic inversion to estimate sand probability and volumetric uncertainty for the Brenda Field.
  Download PDF document: EAGE_ExtendedAbstract.pdf (1.0 Mb)

• Extended Elastic Impedance and its Relation to AVO Crossplotting and Vp/Vs
  Extended Elastic Impedance (EEI) has proved to be a highly convenient framework for seismic AVO studies. The directness of the EEI method is one of its strengths, making it unnecessary to perform intermediate steps such as examining conventional AVO attributes (eg intercepts and gradients). This paper, presented by Graham Hicks and Ashley Francis at the EAGE 68th Conference & Exhibition, Vienna, Austria, 12 - 15 June 2006, explains some of the parallels between conventional AVO and EEI analysis and introduces a new AVO attribute for estimating background Vs/Vp ratio.
  On-line show: First slide
  Download PDF document: EAGE_ExtendedAbstract.pdf (0.7 Mb)

• Technical Note: Ardmore Field Extended Elastic Impedance Study
  This Technical note is a case study describing deterministic inversion work undertaken by Earthworks on the Ardmore Field, UKCS. In addition it serves as a briefing document on our methods of applying Extended Elastic Impedance to predict reservoir properties. A short version was presented by Ashley Francis and Graham Hicks at the EAGE 68th Conference & Exhibition, Vienna, Austria, 12 - 15 June 2006.

  On-line show: First slide

  Download PDF document: EAGE_ExtendedAbstract.pdf (2.2 Mb)

  Download PDF document: ArdmoreFieldTechnicalNote.pdf (11.1 Mb)

• How Uncertain is your Seismic Inversion?
  Our ultraFast stochastic seismic inversion technology is still being improved. To understand the uncertainty in seismic inversion please see our Deterministic and Stochastic Comparison

Geophysics

You can find the more about the following previously published technical papers in the Geophysics section.


• Technical Note: Extended Elastic Impedance Theory
• Technical Note: Coloured, Deterministic and Stochastic Inversion
• PETEX 2002: Deterministic Inversion - Overdue for Retirement?
• Improving a Well Tie with Backus Upscaling
• Real and Relict Direct Hydrocarbon Indicators in the East Irish Sea Basin
• Application of Relative Acoustic Impedance Inversion to Constrain Extent of E Sand Reservoir on Kadanwari Field

Geostatistics

You can find the more about the following previously published technical papers in the Geostatistics section.


• Traps for the Unwary Subsurface Geoscientist
• Post-Processing Geostatistical Realisations - the Spillpoint

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