摘要
混积岩是一种普遍而重要的岩石组合类型。然而长期以来,对混积岩的岩石学分类与命名一直存在诸多争议,且尚未有统一的分类体系与命名规则。本文结合渤海海域混积岩岩石薄片组分鉴定、岩石储层物性分析等最新研究成果,并与相关文献结合,最终确立以陆源碎屑物、生物成因碳酸盐颗粒、化学沉淀碳酸盐为三组分端元的一套新的混积岩岩性分类体系,并将混积岩分为4大类、16亚类。通过讨论混积岩混积层系及混积岩组构界定的问题,进一步完善了混积岩定义。利用新的岩石学分类方案,可为储层评价研究提供指导。以渤海海域为例,建立起研究区不同岩性相与储层物性的对应关系,并在岩性分类体系中划分出差储层、中等储层及优质储层三个储层区。
Mixed siliciclastic—carbonate sediment is quite a common and significant type of petrological association.However,there are enormous controversies that have a long period in the classification and designation of mixed sediments and a standard devoted to petrological classification and naming rule has not been produced.Combined with relevant literatures as well as the latest achievements including component identification of thin section and petrophysics analysis of reservoir in Bohai Sea area,this paper establishes a new classification system of mixed sediments whose endpoints consist of terrigenous grains,biogenic carbonate particles and chemical carbonate respectively and the classified results of the mixed sediments are grouped into 4 main categories and 14 subcategories.Furthermore,we renew the concept of mixed sediments through the discussion that contain alternated strata of mixtures and define of the textural content.By means of the new petrological classification, it may offer the instruction for the study of reservoir assessment.Taking Bo Hai Sea area as example,the corresponding relation between the different reservoir properties and lithofacies has been established.We are likely to identify different types of reservoir including poor,moderate and excellent grade in this new classified system.
作者
叶茂松
解习农
徐长贵
杜晓峰
宋章强
杜学斌
YE Maosong;XIE Xinong;XU Changgui;DU Xiaofeng;SONG Zhangqiang;DU Xuebin(Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education,China University of Geosciences,Wuhan,430074;Exploration and Development of Research Institute of Bohai Oil Field,Tianjin Branch,CNOOC Ltd,Tanggu,Tianjin,300452)
出处
《地质论评》
CAS
CSCD
北大核心
2018年第5期1118-1131,共14页
Geological Review
基金
国家自然科学基金面上资助项目(编号:41772111)的成果~~
关键词
混积岩
分类命名
混积层系
陆源碎屑下限值
岩性相
储层物性
mixed siliciclastic--carbonate sediments
petrological classification
naming rule
mixed bed series
lower limiting value of terrigenous grains
lithofacies
reservoir properties
