刘滨莹,张宏伟,王芳,王鹏,郭增虎,刘东民,王雷,万照飞

• 1:中国石油东方地球物理公司研究院地质研究中心

摘要(Abstract)：

狼山分支断层是控制河套盆地吉兰泰构造带的主要断层，多口油气高产井油气成藏均与该断层形成演化关系密切。应用三维地震资料及钻井资料对狼山分支断层几何学特征、运动特征进行剖析，根据断距、断层产状变化，将狼山分支断层分为北、中、南3段；以反转断层理论为基础，明确断层反转类型及期次；采用地层趋势法建模，钻井声波时差点控校正法计算断层上下盘地层原始厚度，恢复断层古断距，总结出正断层、逆断层及负反转3类生长断层的6种不同的计算方法，分别定量计算不同沉积时期断层各段的活动速率。对断层北、中、南3段断层活动特征开展定量评价，根据平衡剖面对比及活动速率分析，认为狼山分支断层经历4个演化阶段，发育初期为3条倾向、走向不同的“孤立”断层；早白垩世李三沟组沉积时期分段逆冲，断层北段与中段“软连接”;固阳组沉积时期各段逆断层均反转为正断层；古近纪至新近纪强烈伸展，断层北段与中段“硬连接”为1条断层；新近纪晚期至第四纪局部走滑扭动，断层3段正式连锁成为现今的连通大断层。断层在不同历史时期的活动对于上下盘沉积体系发育、圈闭形成与演化以及油气的运聚与成藏均有明显的控制作用。

关键词(KeyWords)： 狼山分支断层;几何学;负反转;断层活动速率;分段演化;油气成藏

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘滨莹,张宏伟,王芳,王鹏,郭增虎,刘东民,王雷,万照飞

DOI: 10.19509/j.cnki.dzkq.2022.0173

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