东营凹陷半深湖—深湖细粒沉积岩岩相类型及特征  

Characteristics and types of fine-grained sedimentary rocks lithofacies in semi-deep and deep lacustrine,Dongying Sag

作　　者：张顺 陈世悦 崔世凌[2] 龚文磊 于景强[2] 鄢继华 邵鹏程 刘姚 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田物探研究院,山东东营257022

出　　处：《中国石油大学学报（自然科学版）》2014年第5期9-17,共9页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(41372107);中央高校基本科研业务费专项(12CX04005A)

摘　　要：通过岩心观察描述、薄片鉴定、X射线衍射分析、激光共聚焦显微镜分析等技术,以直观反映岩相间差异为原则,综合矿物成分、层理构造、有机质丰度、颜色以及其他混入物等因素,对东营凹陷沙三—沙四段半深湖—深湖细粒沉积岩进行岩相类型划分。结果表明:东营凹陷半深湖—深湖细粒沉积岩发育9种岩相类型,根据有机质含量对其中较发育的6种类型进一步细分为11个亚类;相对发育的富有机质纹层状灰岩、中有机质纹层状混合细粒岩、富有机质页状黏土岩、富有机质页状灰岩以及贫有机质块状混合细粒岩等5种岩相类型在宏观及微观特征、测井响应特征及发育环境等方面具有差异性;各岩相的平面分布特征反映了半深湖—深湖内部沉积环境的差异。Combining detailed description of core,thin sections identification,analysis of whole rock X-ray diffraction and scanning electron microscopy technologies,this study sets up a lithofacies classification scheme that is suitable for the finegrained sedimentary rock in the 3rd and 4th members of Shahejie Formation in the west part of Dongying area. The analyses are based on the direct reflection of lithofacies differences and integrating various factors such as mineral composition,sedimentary structure,organic matter abundance,color and other foreign matters. The results show that there are nine types of lithofacies,and six major types,which can be further divided into 11 sub-types according to their organic content. This study mainly focuses on the five types of facies which are relatively developed,such as organic-rich laminated limestone,organicrich calcareous interbedded limestone,organic-contained fine-grained mixed sedimentary rocks,organic-lean massive clay stone and organic-rich laminated clay stone. The differences in macroscopic characteristics,microscopic characteristics,log responses and sedimentary microfacies are analyzed. The lateral distribution of lithofacies is shown to reflect the differences in semi-deep and deep lacustrine.

关 键 词：东营凹陷 半深湖—深湖 细粒沉积岩 岩相 测井响应 

分 类 号：TE121.3[石油与天然气工程—油气勘探]