海相深水沉积研究现状及展望  

THE PRESENT RESEARCH STATUS OF DEEP-WATER DEPOSITION AND FORECASTS

作　　者：韩小锋[1] 陈世悦[2] 牛海青[2] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020 [2]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《地质找矿论丛》2008年第4期275-280,共6页Contributions to Geology and Mineral Resources Research

摘　　要：深水沉积根据沉积物来源可以分为深水异地沉积和深水原地沉积。深水异地沉积是指海洋深水区经横向搬运而形成的沉积,它是相对于垂直降落沉积作用形成的原地沉积而言的。通常前者形成的沉积物比后者的粒度粗。深水异地沉积主要包括重力流沉积和深水牵引流沉积两大类;深水原地沉积主要包括深水泥页岩沉积。重力流沉积还可以按其发育的沉积环境而划分为扇状沉积体系(海底扇或湖底扇)、沟道或槽谷沉积体系、层状或带状沉积体系等。深水牵引流沉积是20世纪60年代以来沉积学迅速发展的一个新的研究领域。目前深水牵引流沉积的研究主要集中于等深流沉积和内潮汐、内波沉积。深水牵引流沉积的储集性能优于浊流沉积,故具有非常重要的含油气潜能。According to sources of the sediment the deep-water sediments can be divided into the allochthonous and the autochthonous types. The allochthonous means deposition through cross transportation （corresponding to vertical settlement of sediment） in deep-water of the sea or the lake. Usually, the deposition through cross transportation is coarser than the vertical settled sediments. The allochthonous deposition mainly includes the gravity current settled sediments and the tractive current settled sediments. The autochthonous mainly includes the argillaceous deposit. The gravity current deposition also may, according to different environment, includes the fan like deposition system （submarine fan or sublacustrine fan）, the channel or the trough valley deposition system, bedded or banded deposition system and so on. The tractive current deposition has been a new field of sedimentological research since the 60＇s of 20th century. At present the research of the deep water tractive current deposition mainly focus on contourite and internal tide, internal wave deposition. The oil storage evaluation of the deep-water tractive current deposits is better than turbidite rock,therefore it has extremely great capability of accumulation of hydrocarbon.

关 键 词：重力流沉积 牵引流沉积 深水环境 油气资源 

分 类 号：P512.32[天文地球—地质学] P618.13