东营凹陷牛庄洼陷地层压力演化及其成藏意义

鲍晓欢; 郝芳; 方勇

Volume 32 Issue 2

Mar. 2007

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BAO Xiao-huan, HAO Fang, FANG Yong, 2007. Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation. Earth Science, 32(2): 241-246.

Citation:

BAO Xiao-huan, HAO Fang, FANG Yong, 2007. Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation. Earth Science, 32(2): 241-246.

BAO Xiao-huan, HAO Fang, FANG Yong, 2007. Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation. Earth Science, 32(2): 241-246.

Citation:

BAO Xiao-huan, HAO Fang, FANG Yong, 2007. Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation. Earth Science, 32(2): 241-246.

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Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation

1.
Department of Petroleum Geology ,China University of Geosciences ,Wuhan 430074,China
2.
Faculty of Natural Resources and Information Technology ,China University of Petroleum ,Beijing 102249,China

Received Date: 2006-03-30
Publish Date: 2007-03-25

Abstract

Abstract

The present geopressure field in Niuzhuang sag in Dongying depression can be divided into dissimilar zones vertically and different areas horizontally. Overpressure is closely related to both the upper part of the fourth member and the lower part of the third member of Shahejie Formation whose source rocks matured. Large-scale faults surrounding Niuzhuang sag limit the horizontal overpressure distribution. Inside the sag it is strongly overpressured while outside it is much less overpressured. The forward modeling indicates that the overpressure evolution in the sag is divided into three stages: original-forming, meta-declining and latest-raising stages. And the main mechanism for generating overpressures evolved from undercompaction into combination of both undercompaction and hydrocarbon generation. Meanwhile, both lateral seal by large-scale faults surrounding Niuzhuang sag and vertical seal by the thick and shale-enriched bottom layer of the middle part of the third member of Shahejie Formation determined the special distribution of overpressure. The overpressure in Niuzhuang sag provided the petroleum migration with original forces in those two important accumulation periods. Coupling of overpressure evolution and tectonic activities played an active role in petroleum accumulation in the bordering faulted zone near Niuzhuang sag.
- Niuzhuang sag,
- overpressure,
- evolution of geopressure field

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References(34)

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Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation

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