Geochemical Characters Recognition for Steranes and Hopanes from Oils of Tahe Oilfield
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2006-04-10
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Key words:
- sterane /
- hopane /
- biomarkers /
- Tahe oilfield /
- geochemistry
Abstract: Biomarker is one of the most effective tools in the study of oilsource correlation gasoil maturity and gasoil migration. By using biomarker GC, GC—MS analysis techniques, the geochemical characters of steranes and hopanes from crude oils of Tahe oil field were investigated in this paper. The study shows〖KG*2〗Tahe oilfield is a compound oil reservoir, which is composed of later generated oils with high maturity lighter biodegradation and earlier〖KG*2〗generated oils with low maturity stronger biodegradation. The characters of C27—C29〖KG*2〗steranes and hopanes series indicate oils with varied maturities generated from the same sort of mother materials. The threedimensional diagram〖KG*2〗formed by Ts/(Tm+Ts),〖KG*2〗rearrangedsterane/sterane and ββ/(ββ+αα)C29〖KG*2〗shows that the migration direction of crude oil is from south to north, which confirms the opinion that oil and gas of Tahe oilfield mainly came from Manjiar Depression——an area to the south of Tahe oilfield.
Citation: | NAN Qingyun. Geochemical Characters Recognition for Steranes and Hopanes from Oils of Tahe Oilfield[J]. Acta Sedimentologica Sinica, 2006, 24(2): 294-299. |