[Retracted] Geochemical Characteristics of Crude Oil in Member 7 of Yanchang Formation in Yanchang Oilfield

Table 2

C29 mature marks of sterane crude oil.

Alkanes C29 class	Immature crude oil	Mature crude oil
C29ααα	<0.3	>0.3
C29ααβ	<0.32	>0.32