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* Geohistory analysis with proper gasification [[kinetics]] can usually predict at what depth [[accumulation]]s have been gasified.
* Geohistory analysis with proper gasification [[kinetics]] can usually predict at what depth [[accumulation]]s have been gasified.
* As a rule of thumb, oil should not be expected at subsurface temperatures > [[temperature::150°C]] or a maturation level much above 1.3% R<sub>o</sub>. Dry gas accumulations can occur at shallower depths, but oil is not likely at greater depths.
* As a rule of thumb, oil should not be expected at subsurface temperatures > [[temperature::150°C]] or a [[maturation]] level much above 1.3% R<sub>o</sub>. Dry gas accumulations can occur at shallower depths, but oil is not likely at greater depths.
* Gasification of oil in reservoirs is associated with the formation of pyrobitumen.<ref name=ch11r34>Tissot, B. P., D. H. Welte, 1984, Petroleum Formation and Occurrence, 2 ed.: New York, Springer-Verlag, 699 p. 460–461</ref>
* Gasification of oil in reservoirs is associated with the formation of pyrobitumen.<ref name=ch11r34>Tissot, B. P., D. H. Welte, 1984, Petroleum Formation and Occurrence, 2 ed.: New York, Springer-Verlag, 699 p. 460–461</ref>
* Displacement of oil from a trap by gas is associated with asphaltene precipitates and/or relatively unaltered oil stain.
* Displacement of oil from a trap by gas is associated with asphaltene precipitates and/or relatively unaltered oil stain.