| 松辽盆地三肇凹陷“T11”多边断层非构造成因机制探讨 |
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| 引用本文： | 付晓飞,宋岩.松辽盆地三肇凹陷“T11”多边断层非构造成因机制探讨[J].地质学报,2008,82(6):738-749. |
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| 作者姓名： | 付晓飞 宋岩 |
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| 作者单位： | 1. 大庆石油学院地球科学学院,黑龙江大庆,163318
2. 中国石油勘探开发研究院实验中心,北京,100083 |
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| 基金项目： | 中石油中青年创新基金项目（编号06E1007）和大庆石油学院地球科学学院研究生基金（编号dky001） |
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| 摘 要： | 地质学家过去一直关注松辽盆地“T2”高密度断层系，其成因机制存在很大的争议，但并没注意到“T11”也为高密度断层系。笔者系统研究了三肇凹陷肇州地区“T11”断层系几何学特征和形成的地质背景，首次提出“T11”断层为典型的多边形断层，仅从目前构造演化历史难以解释其成因，基于断层与较厚的青山口组具异常高孔隙流体压力的泥岩分布一致，认为多边断层为长期发育断层反转期再活动诱导青山口组泥岩层密度反转的成因机制，随着超压的积累断层周期性活动，是葡萄花油层油气运移的长期通道。
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| 关 键 词： | 三肇凹陷 多边断层 非构造成因 密度反转 运移通道 |
| 收稿时间： | 6/5/2007 12:00:00 AM |
| 修稿时间： | 2007年6月5日 |
Nontectonic Mechanism of Polygonal "T11" Faults in the Sanzhao Sag of Songliao Basin |
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| FU Xiaofei,SONG Yan.Nontectonic Mechanism of Polygonal "T11" Faults in the Sanzhao Sag of Songliao Basin[J].Acta Geologica Sinica,2008,82(6):738-749. |
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| Authors: | FU Xiaofei SONG Yan |
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| Abstract: | Geological research focused on high density "T2" fault system in the past,and its forming mechanism is of great controversy,whereas "T11" also as a high density fault system has been ignored.Systematic researches on geometry and geological setting of "T11"fault system in Zhaozhou area within Sanzhao sag were conducted,and the theory that "T11"is a typical polygonal fault was firstly proposed,formation of which can not be explained easily only by tectonic evolution history.Based on the fact that fault is in accordance with the distribution of mudstone,which bears abnormal pore-fluid pressure in K1qn Formation,it is considered that pervasive-developed fault activated in the reverse period caused density inversion of K1qn mudstone formation,which lead to the formation of polygonal fault,and periodically active fault that formed by the accumulation of overpressure is the migration pathway of oil and gas in tbe Putaohua reservoir. |
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| Keywords: | Sanzhao sag polygonal fault nontectonic mechanism density inversion migration pathway |
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