张翔,田景春,陈洪德,侯明才,刘娟

• 1:成都理工大学"油气藏地质及开发工程"国家重点实验室
• 2:成都理工大学沉积地质研究院

摘要(Abstract)：

根据沉积学、地球物理和地球化学等标志,确定研究区石千峰组为辫状河、曲流河、三角洲和湖泊的沉积类型。在沉积特征研究的基础上,进行层序界面的识别和划分,进而在研究区石千峰组内划分并识别出短期、中期、长期、超长期4种类型的旋回层序。通过对各级别层序特征的详细研究,表明中期基准面旋回与沉积体系有很好的响应关系,表现为辫状河和曲流河具有A1和A2型中期基准面变化特征,三角洲平原、三角洲前缘和湖泊沉积分别具有C1、C2、C3和B型的响应特征。结合研究区石千峰期由北至南发育河流—三角洲—湖泊的古地理展布特征,最终将这些丰富的地质信息以沉积—层序模式进行了概括,表现为由北至南发育河流—三角洲—湖泊的沉积类型,具有A1-A2-C1-C2-C3-B型的层序响应特征。建立的这样一套等时模式,能更详尽的了解研究区生储盖的时空配置关系,为下一步油气勘探提供地质依据。

关键词(KeyWords)： 沉积特征;沉积—层序模式;石千峰组;二叠系;鄂尔多斯盆地

Abstract:

Keywords:

基金项目(Foundation): 四川省重点学科“构造地质学”建设项目(SZD0408)

作者(Author): 张翔,田景春,陈洪德,侯明才,刘娟

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