Kerogen types: comparison of maturity measures
Jump to navigation
Jump to search
Parameter differences
The table below shows examples of the relationships between hydrocarbon generation zones, maturity, and transformation ratio for standard types II and III kerogens, based on a specific burial and thermal history model. The most significant difference is in the depth to the onset of oil generation, where depth::1000 m separates the top of the oil windows of these two kerogen types.
Hydrocarbon generation zone | Vitrinite reflectance, % Ro | Transformation ratio, % | Present-day depth, m | Type II | Type III | Type II | Type III | Type II | Type III |
---|---|---|---|---|---|---|---|---|---|
Onset oil | 0.55 | 0.85 | 5 | 12 | 2200 | 3200 | |||
Onset peak rate generation | 0.65 | 1.00 | 17 | 31 | 2600 | 3500 | |||
Onset gas/cracking liquids | 0.95 | 1.35 | 88 | 64 | 3400 | 4050 |