Overview:
• Application specific variants
– cannot be accommodated via standard model’s wfs
• Validity dependent on adherence to SOPs
– e.g. survey frequency
• Importance of QC tests
Propagation mode station to station
• Error correlation between successive measurements
• Correlated (1) or uncorrelated (0)
– Systematic or Random
• Straight edge?
Validation
• Is the model generally valid?
• Does a particular log conform to the model’s prediction?
• Field test
• Continuous monitoring
• Reconciliation
....
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Introduction to Error Modelling
Harry Wilson - Baker Hughes