International Geologiical Congress - Oslo 2008

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EIE-01 General contributions to exploration geophysics

 

Standardized LFP interpretation products

 

Erik Ødegaard, StatoilHydro ASA (Norway)
 

 

This poster presents the (minimum set of) standardized Lithology- and Fluid Prediction interpretation products in StatoilHydro, with examples.

Interpretation data, minimum set (always generated):
- All multi-versions presented as relative impedance
• Layer representation, more in line with geological understanding...
• Easier-to-interpret AVO / fluid factor anomalies...
• (May not work well close to strong contrasts...)
- Fluid factor impedance (i.e. deviations from relative shale-shale reflectivity) to identify anomalies of interest
• HCs (should) produce deviations below the (data-specific) background trend
- P-impedance (i.e. ?Intercept' impedance)
• One of the fundamental elastic parameters
- S-impedance (from AVO inversion)
• One of the fundamental elastic parameters, (almost) insensitive to variations in fluid type. Corresponding variations in fluid factor and P-impedance, without corresponding variations in S-impedance can be used as strong support for HCs!
- (Density (from AVO inversion using high quality far offset/angle data, if available))
• One of the fundamental elastic parameters, can e.g. be used to discriminate between oil and gas

Overall goal:
- Improve the general LFP / AVO interpretation competence in the organization, by
• standardizing the set of LFP interpretation products, and through
• increased involvement of the project/team geoscientists, resulting in feelings of
• ownership of the LFP interpretation data

 

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