第三沉降带应力场研究
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摘要
介绍了第三沉降带的分布,监测得出的大量人工裂缝方向数据及由人工裂缝方向数据统计得出的最大水平主应力方向。结果表明,第三沉降带由北向南绵延1 500 km,最大水平主应力方向大体稳定,分布在55°~75°NE范围,多为65°NE。由监测结果可以判断,第三沉降带的构造应力方向是南亚板块及菲律宾板块共同作用的结果。
Stress distribution in the third subsidence belt is presented, with great amounts of data on hydraulic fracture orientation obtained from monitoring hydraulic fracturing,and the direction of the maximum principle stress is specified.The results indicate that the third subsidence belt extends over 1 500 km from north to south,and the direction of the maximum principle stress ranges from 55°NE to 75°NE,concentrated on 65°NE,showing a stable distribution of the direction of maximum stress.The monitoring data implies that the tectonic stress direction in third subsidence belt is the combined result of South Asia Plate and Philippine Plate.
Stress distribution in the third subsidence belt is presented, with great amounts of data on hydraulic fracture orientation obtained from monitoring hydraulic fracturing,and the direction of the maximum principle stress is specified.The results indicate that the third subsidence belt extends over 1 500 km from north to south,and the direction of the maximum principle stress ranges from 55°NE to 75°NE,concentrated on 65°NE,showing a stable distribution of the direction of maximum stress.The monitoring data implies that the tectonic stress direction in third subsidence belt is the combined result of South Asia Plate and Philippine Plate.
引文
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[3]刘建中,孙庆友,徐国明,等.油气田储层裂缝研究[M].北京:石油工业出版社,2008
[4]成尔林,张美芳.鄂尔多斯块体周边的地震活动及地震机制[J].地震研究,1986,9(2):27-42
[5]刘建中.缅甸弧的俯冲作用及川滇断块的地震地质特征[J].中国地震,1992,8(2):68-75
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