孙国桐;

• 1:中国石油勘探开发研究院

摘要(Abstract)：

深水重力流沉积研究经历了半个多世纪发展,从浊流及鲍马序列开始,到把深水砂岩普遍解释为浊流成因以及海底扇模式的建立,再到今天学者们对鲍马序列的质疑,深水重力流沉积的研究经历了认识上的螺旋式上升旋回。目前关于深水重力流沉积争议的焦点在于高密度浊流是否属于浊流的范畴,深水砂岩是否都是浊流成因。以Shanmugam为代表的学者认为,绝大多数的深水砂岩都是碎屑流成因而非浊流成因,并且提出了重力流分类新方案,同时建立了与其匹配的深水斜坡沉积模式。通过对前人成果的广泛调研,经过对比总结,认为:1根据流变学和沉积物搬运机制,重力流分为碎屑流(砂质碎屑流和泥质碎屑流)、颗粒流、浊流;2浊流的韵律结构特征为明显的正粒序且没有漂浮的碎屑颗粒,碎屑流自下而上呈逆-正粒序的两套韵律变化且发育有漂浮的碎屑颗粒;3Walker的综合扇模式与Shanmugam的斜坡沉积模式,二者是可以共存的,只是在某一地区适用性不同而已。

关键词(KeyWords)： 深水砂岩;浊流;沉积模式;碎屑流

Abstract:

Keywords:

基金项目(Foundation): 国家重大专项“大型油气田及煤层气开发”(2011ZX05029-01)

作者(Author): 孙国桐;

Email:

DOI:

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