Exploring for Oil and Gas Traps
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Series
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Treatise in Petroleum Geology
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Part
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Critical elements of the petroleum system
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Chapter
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Evaluating source rocks
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Author
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Carol A. Law
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Link
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Web page
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Store
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AAPG Store
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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
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Vitrinite refl., % Ro, Type II
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Vitrinite refl., % Ro, Type III
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Transformation ratio, %, Type II
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Transformation ratio, %, Type III
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Present-day depth, m, Type II
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Present-day depth, m, Type III
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Onset oil
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0.55
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0.85
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5
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12
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2200
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3200
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Onset peak rate generation
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0.65
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1.00
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17
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31
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2600
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3500
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Onset gas/cracking liquids
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0.95
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1.35
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88
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64
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3400
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4050
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See also
External links
find literature about Kerogen types: comparison of maturity measures
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