The conventional indexes of source rocks are as follows :
thickness , abundance , type , hydrocarbon-generation potential ,
which is used to evaluate the effectivity of source rocks although
different limitation of organic carbon for evaluating efficient
source rocks is applied. It is an applicable method without
question for evaluation on efficient source rocks of Tertiary , but
this method is not fully applicable for evaluation on the source
rocks of Upper Paleozoic in North China where multi2tectonic
movements happened , and the source rocks were reformed.
According to the fact that the original geomorphic feature of
Carboniferous and Permian has been broken into different blocks
by folds and faults and there was difference of thermal history at
later period ,the author provides a method to evaluate secondary
hydrocarbon generating potential of Upper Paleozoic and the
evaluation method on source rocks of Upper Paleozoic is different
to those of Tertiary.
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