| 摘 要： | The possibility is explored of using the characteristics of n-alkane distribution as an indicator of oll generating rocks and as indices for some other interesting aspects concerning the secondary migration of oil. It is suggested that the upper limit of the n-alkane OEP value of oil generating rocks should be considered as a function of the age of oil formation rather than a constant regardless of the difference in age. For a given stratum in a given region, it possesses a fixed value which can be defined through analyses and calculations with respect to the known oil generating rocks within rids stratum.
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