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ponzi_implosion

07/14/11 4:10 PM

#243329 RE: tryoty #243326

There was no 'massive column of condensate'.

Condensate is derived from thermogenic gas, not biogenic (swamp) gas.

http://www.gaschem.com/determ.html

Why does the type of gas matter?

As described above, biogenic gas is unrelated to the processes that form oil. As a result, if a gas seep or show is bacterial in origin, then the presence of the gas says nothing about the likelihood of an effective petroleum system existing in the basin. Hydrocarbon liquid could be present in the area, but, if it is, then its presence is fortuitous: it is unrelated to the bacterial gas show. Similarly, if a gas seep bubbling from a lake bottom is found to be bacterial gas, then the presence of the seep says nothing about the presence of an underlying petroleum system.

In contrast, if a gas show is found to be thermogenic in origin, then the possibility exists that the gas derives from a gas cap overlying a down-dip oil leg. That possibility can be further evaluated from specific aspects of the composition of the thermogenic gas (see, Predicting Down-dip Oil, and Basin Modeling).