阳霞凹陷超压成因及与油气成藏关系

石万忠; 陈红汉; 张希明; 陈惠超

Volume 30 Issue 2

Mar. 2005

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Article Navigation > Earth Science > 2005 > 30(2): 221-227

SHI Wan-zhong, CHEN Hong-han, ZHANG Xi-ming, CHEN Hui-chao, 2005. Origin of Overpressure and Relation with Oil & Gas Pool-Forming in Yangxia Sag. Earth Science, 30(2): 221-227.

Citation:

SHI Wan-zhong, CHEN Hong-han, ZHANG Xi-ming, CHEN Hui-chao, 2005. Origin of Overpressure and Relation with Oil & Gas Pool-Forming in Yangxia Sag. Earth Science, 30(2): 221-227.

SHI Wan-zhong, CHEN Hong-han, ZHANG Xi-ming, CHEN Hui-chao, 2005. Origin of Overpressure and Relation with Oil & Gas Pool-Forming in Yangxia Sag. Earth Science, 30(2): 221-227.

Citation:

SHI Wan-zhong, CHEN Hong-han, ZHANG Xi-ming, CHEN Hui-chao, 2005. Origin of Overpressure and Relation with Oil & Gas Pool-Forming in Yangxia Sag. Earth Science, 30(2): 221-227.

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Origin of Overpressure and Relation with Oil & Gas Pool-Forming in Yangxia Sag

1.
Faculty of Earth Resources, China Univer sity of Geosciences, Wuhan 430074, China
2.
Acad emy of Design & Research, Northwest Bureau of Petroleum, SINOPEC, Urumchi 830011, China

Received Date: 2004-07-23
Publish Date: 2005-03-25

Abstract

Abstract

The origin and distribution of formation overpressure has an effect not only on hydrocarbon migration and accumulation, but also on drilling well technique. The study and prediction of overpressure is very important in basin study. (Yangxia) sag is a sub-tectonic unit in Kuqa depression. Drilling shows overpressure is very common in Yangxia sag. Using logs, test materials and seismic data, this paper analyzes the origin of overpressure and its influence on oil and gas pool-forming.Resultsshow that: (1) Overpressure in Jidike Formation is mainly developed by deposition, and overpressure in Cretaceous by tectonic stress. These two overpressure systems are completely different in origin. (2) The overpressure in the Baxigai and Bashijiqike formations formed in the Pliocene when the Kuqa Formation was deposited, that is earlier than the Kuqa-Xiyu period when oil and gas migrated on a large scale. The overpressure cannot be released by the faults because there are faults around the Ku1 well area, which resisted oil and gas entering the reservoir and influenced pool-forming.
- overpressure,
- origin of overpressure,
- pool-forming,
- Yangxia sag,
- Kuqa depression

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References(28)

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