Module 9: Petroleum Geochemistry: Well Site Gas Analysis
Learning objectives
Understand the origin of the gases collected during the drilling processes
Awareness of wellsite gas data: how it is collected on a rig and measured
Understand how the data is reported by service companies
Explain the origin and significance of wellsite gases and what corrections are required to maximise the geological signal.
Awareness of how to use gas data to spot pay zones
Understand what cause changes in associated and non-associated gas composition’s
Example of how to correct wellsite gas data and calibrate it to PVT data
Appreciate where it can go wrong:
Reservoir vs non-reservoir zones
Impact of coring
Drilling induced effects
Linkage to Pore Pressure
Examples & some recommendations on set up

