RESEARCH ON INDICATORS OF OIL-SOURCE CORRELATION IN THE SUBEI BASIN

There are three sets of oil source rock in the Subei Basin.They are the Second Member of Taizhou Formation in the Upper Cretaceous,the Second Member and the Fourth Member of Funing Formation in the Paleocene.Their kerogen properties and geological environments are similar.They are difficult to be distinguished by using common indexes.For this reason,a multi-parameter plate and such indicators as normal alkane,primary sterane,triaromatic steroid series and dimethyl carbazole series have been suggested and triumphantly used for source-rock identification in the Subei Basin.It is recommendable that the dimethyl carbazole series being used for oil-gas migration researches show the amazing stability in discrimination of the oils with the same sources.This provides a detail fingerprint information on the further division of oil origins.