摘要
在对苏北盆地高邮凹陷阜宁组一段储层岩心薄片的大量观察和分析基础上,对与阜一段储层成岩作用有关的流体包裹体进行了系统分析,明确了成岩作用流体性质.根据流体性质可以分为四个重要成岩流体活动阶段:①早期弱碱性流体活动,成岩温度50~80℃;②成岩流体演变为酸性.成岩温度80~105℃:③成岩流体演变为碱性,成岩温度95~120℃;④成岩流体演变为酸性,成岩温度110~140℃.碱性流体活动时期发生碳酸盐胶结,酸性流体活动期发生硅质胶结(石英次生加大).酸性流体对次生孔隙的发育有利,由于成岩演化历史过程中酸性流体有限,其活动区域应当重点分析.
Based on observation and analysis of rock flakes from the 1^st member Funing Formation in Gaoyou Sag, the fluid inclusions connected with diagenesis (the character and stages of diagenesis fluids) were analyzed systematically. The results show that the 1^st member Funing Formation mainly underwent four stages of diagenesis environment according to fluids characteristics. The first stage was alkalescent diagenesis fluid, with the diagenesis temperature from 50 to 80 ℃ ; the second stage was acidic fluid with the diagenesis temperature from 80 to 105 ℃ ; the third stage was alkaline fluid with the diagenesis temperature from 95 to 120 ℃ , and the last stage was acidic fluid with the diagenesis temperature from 110 to 140 ℃. Carbonate cementation occurred when alkalescent fluid appeared, while silica cementaion (quartz overgrowth) mainly occurred in stage of acidic fluid movement. In addition,acidic flu id was beneficial to the formation of secondary hole in reservoir, but its quantity was very limited in the history of di agenesis,so it was important to determine its activity area.
出处
《山东科技大学学报(自然科学版)》
CAS
2013年第5期53-60,共8页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(40902040)
中央高校基本科研业务费专项资金项目(10CX05004A)
关键词
高邮凹陷
阜宁组
储层
成岩环境
流体包裹体
Gaoyou Sag
Funing Formation
reservoir
diagenesis environment
fluid inclusions