牛庄洼陷“岩性油气藏”油气成因

李素梅; 邱桂强; 姜振学; 高永进

Volume 32 Issue 2

Mar. 2007

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LI Su-mei, QIU Gui-qiang, JIANG Zhen-xue, GAO Yong-jin, 2007. Origin of the Subtle Oils in the Niuzhuang Sag. Earth Science, 32(2): 213-218.

Citation:

LI Su-mei, QIU Gui-qiang, JIANG Zhen-xue, GAO Yong-jin, 2007. Origin of the Subtle Oils in the Niuzhuang Sag. Earth Science, 32(2): 213-218.

LI Su-mei, QIU Gui-qiang, JIANG Zhen-xue, GAO Yong-jin, 2007. Origin of the Subtle Oils in the Niuzhuang Sag. Earth Science, 32(2): 213-218.

Citation:

LI Su-mei, QIU Gui-qiang, JIANG Zhen-xue, GAO Yong-jin, 2007. Origin of the Subtle Oils in the Niuzhuang Sag. Earth Science, 32(2): 213-218.

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Origin of the Subtle Oils in the Niuzhuang Sag

1.
Key Laboratory for Hydrocarbon Accumulation, Ministry of Education, 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

Publish Date: 2007-03-25

Abstract

Abstract

Detailed oil-oil, oil-source rock comparison according to the composition and distribution of hydrocarbons in the Niuzhuang sag was performed to unravel genetics and migration mechanism of the oil Results indicate that the oils analyzed are characterized by low ratios of Pr/Ph (< 1) and relative high concentration of steranes and gammaceranes, which are typical features of Es₄ source rocks. No genetic relationship was observed between the oil and the middle interval of Es₃ mudstones characterized by Pr/Ph>1 and low concentration of gammaceranes, and apparent dissimilarities were also observed between the oil and the low interval of Es₃ mudstones. We suggested that the oils are mixed oils derived from the Es₃^L and Es₄ mudstones, and there is no possibility of the Es₃^M to be the primary source rock for the oil. The results show that the traditional hydrocarbons migration and accumulation model for subtle oil pools especially sandy lens-shaped pools featured by short oil migration distance with hydrocarbons sourced from surrounding mudstones is unlikdy fit for the cases of this study. The mixing of the oils source from the Es₄ with hundreds of meters under the Es₃^M oil pools probably indicates the existence of subtle oil migration pathways.
- Niuzhuang sag,
- lithological oil pools,
- oil-gas genetic mechanism,
- oil-source rock comparison

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References(17)

References

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