王古1井奥陶系油气成因及其意义

李素梅; 庞雄奇; 邱桂强; 高永进

Volume 30 Issue 4

Jul. 2005

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LI Su-mei, PANG Xiong-qi, QIU Gui-qiang, GAO Yong-jin, 2005. Origin and Significance of the Ordovician Oil from Well WG 1, Dongying Depression, Bohai Bay Basin. Earth Science, 30(4): 451-458.

Citation:

LI Su-mei, PANG Xiong-qi, QIU Gui-qiang, GAO Yong-jin, 2005. Origin and Significance of the Ordovician Oil from Well WG 1, Dongying Depression, Bohai Bay Basin. Earth Science, 30(4): 451-458.

LI Su-mei, PANG Xiong-qi, QIU Gui-qiang, GAO Yong-jin, 2005. Origin and Significance of the Ordovician Oil from Well WG 1, Dongying Depression, Bohai Bay Basin. Earth Science, 30(4): 451-458.

Citation:

LI Su-mei, PANG Xiong-qi, QIU Gui-qiang, GAO Yong-jin, 2005. Origin and Significance of the Ordovician Oil from Well WG 1, Dongying Depression, Bohai Bay Basin. Earth Science, 30(4): 451-458.

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Origin and Significance of the Ordovician Oil from Well WG 1, Dongying Depression, Bohai Bay Basin

1.
Key Laboratory for Hydrocarbon Accumulation Mechanism, China University of Petroleum, Beijing 102249, China
2.
Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China
3.
Shengli Oilfield Company Limited, SINOPEC, Dongying 257015, China

Received Date: 2004-12-25
Publish Date: 2005-07-25

Abstract

Abstract

Considerable quantities of Ordovician oils were recently discovered from the burial hill in well WG 1 in the south slope of the Dongying depression, Bohai Bay basin. The oils are characterized by high content of waxy alkanes (40.84%) with a low concentration of steranes and terpanes, which are completely different from the overlying Tertiary oils of the Shahejie Formation. By removing the alkanes from the Ordovician oil with a molecular sieve and analyzing the inclusion component of well WG 1, important biomarker information was obtained, such as steranes and terpanes, which are crucial for source rock tracing.Resultsshow that the Ordovician oil and inclusion component of the well WG 1 correlated well with the source rocks of the Tertiary Kongdian Formation (Ek²) rather than that of the Shahejie Formation, suggesting potential source rocks for the Ordovician oils.Resultsof the δ¹³C values of the compound-specific isotope of alkanes show similar values and varying trend of the Ordovician oils to that of the Ek² source rocks, which further proves the Ek² mudstones to be responsible for the deep oils. The discovery of the high waxy oils of Ordovician from well WG 1 suggests the existence of a new set of deep source rocks and good potential of deep oils in the Dongying depression.
- Ordovician,
- burial hill,
- high waxy oil,
- source rock,
- Kongdian Formation

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References(30)

References

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