石油实验地质2016，Vol.38Issue(3)：293-302,10.DOI:10.11781/sysydz201603293
陆相碎屑岩中钙质胶结物沉淀机制及油气储集意义——来自济阳坳陷孔店组和川西须家河组的对比研究
Sedimentation mechanism and petroleum significance of calcareous cements in continental clastic rocks:Comparison between the Kongdian Formation in the Jiyang Depression and the Xujiahe Formation in the western Sichuan Basin
摘要
Abstract
The mechanism of calcareous cementation in clastic rocks in the Kongdian Formation in the Jiyang Depres?sion and the Xujiahe Formation in the western Sichuan Basin were studied by means of cathode luminescence, scanning electron microscopy, inclusion homogenization temperature measurement, isotope content of carbon and oxygen, and chemical ion. The calcareous cements mainly consist of carbonates, hard gypsum and fluorite. Their microscopic characteristics are influenced by cementation time and environment. Calcium sources and precipitation controlling factors affect the mechanism of calcareous cementation. The calcium sources for calcareous cements mainly include meteoric water eluviation, feldspar dissolution, compaction and dissolution, thermochemical action of organic salt rocks, and clay mineral transformation. The precipitation mechanism of calcareous cements is not influenced by a single factor, but by many factors such as temperature and pressure, pH value and the concentration of chemical ions. The time of calcareous cementation is divided into early, middle and late. The physical properties of reservoirs are in?fluenced by the time of calcareous cementation. Calcareous cements during the early diagenetic stage are constructive to the reservoir, while those during the late diagenetic stage are destructive.关键词
钙质胶结物/钙质来源/沉淀机制/碎屑岩/油气储集/济阳坳陷/川西地区Key words
calcareous cements/calcium source/precipitation mechanism/clastic rock/hydrocarbon accumula?tion/Jiyang Depression/western Sichuan Basin分类
能源科技引用本文复制引用
谭先锋,蒋威,吴康军,王浩,徐田堃,陈苏军,冉天..陆相碎屑岩中钙质胶结物沉淀机制及油气储集意义——来自济阳坳陷孔店组和川西须家河组的对比研究[J].石油实验地质,2016,38(3):293-302,10.基金项目
国家自然科学基金项目(41202043)、中国石油科技创新基金项目(2014D-5006-0108)、重庆市教委科学技术研究项目(KJ1401316)和重庆科技学院优秀人才支持计划(201502)资助. （41202043）
