辽河滩海地区原油地球化学特征及成因类型

doi:10.11743/ogg20110502

Abstract

Abstract:

Tidal zone and shallow water area of Liaohe oilfield are important regions for production replacement.The crude oil types in the study area includes normal oil,heavy oil and super-heavy oil,of which the later two are mostly distributed in th shallow layers and are related to biodegradation and oxidation.According to sedimentary environment,organic matter types and maturity,the crude oils are grouped into 4 types.Type Ⅰ is mature oil with relatively high content of gammacerane,low Pr/Ph and ‘V’ normal sterane,and occurs in the middle to shallow reservoirs of Bijialing and Yuehai oilfields;Type Ⅱ is high mature oil with low content of gammacerane and ‘L’ normal sterane,and occurs in the relatively deep third member of Shahejie Fm in Yuehai oilfield;Type Ⅲ features in high contents of tricyclic terpane,and gammacerane and ‘L’ normal sterane,and occurs in the 3rd member of Dongying Fm of Hainan-11 and Kuihua-16 oilfields on both sides of the hydrocarbon kitchen;Type Ⅳ is relatively low mature oil with low content of gammacerane but high Pr/Ph,and occurs in the Dong-ying Fm of Kuihuadao oilfield.The four genetic types of crude oil indicate that there are several favorable source rocks developed in the tidal zone and shallow water area of Liaohe oilfield,and the deep layer of Yuehai oilfield and the Dongying Fm of Kuihuadao oilfield still have great petroleum potential.

Key words: genetic type of crude oil, biomarker, maturity, tidal zone and shallow water area of Liaohe oilfield

CLC Number:

TE122.1

Yang Weiwei, Liu Guangdi, Wang Yanshan, Gao Gang, Feng Yuan. Geochemical behaviors and genetic types of crude oil in tidal zone and shallow water area of Liaohe oilfield[J]. Oil & Gas Geology, 2011, 32(5): 642-650.

References

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Geochemical behaviors and genetic types of crude oil in tidal zone and shallow water area of Liaohe oilfield

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