摘要
镜质体反射率的演化并不是人们传统意义上认为的随着温度(深度)的增加成指数增加,而是分阶段演化的。通过对有机质热模拟实验数据和自然演化数据进行分析后发现镜质体反射率的演化可以分为明显的3段:1)缓慢变化阶段,随着温度的增加镜质体反射率缓慢地变化;2)中等快速阶段,随着温度的增加镜质体反射率相比较前一阶段增加速率有明显的加大;3)快速增加阶段,随着温度的增加镜质体反射率呈指数快速增加。这种分阶段的演化是由镜质体本身的化学组成和化学结构所决定的。镜质体反射率演化阶段的划分对于热历史的恢复以及认识镜质体的热演化机制和规律具有重要的意义。
The evolution of vitrinite reflectance does not increase exponentially with temperature （burial depth ） as traditionally believed, while performs in several stages. Based on data analysis from thermal simulation experiment and natural evolution of organic matter, the evolution can be divided into three distinct stages： 1）slow-rate evolution, when the vitrinite reflectance increases slowly with increasing temperature; 2）moderate-rate evolution, when the vitrinite reflectance increasing rate becomes much larger than that of the first stage; 3）rapid- rate evolution, when the vitrinite reflectance increases exponentially with increasing temperature. This multi-stage evolution of vitrinite is determined by its chemical composition and structure. The division of the vitrinite reflectance evolution has much significance for the rebuild of thermal history and understanding of the mechanism and rule of vitrinite thermal evolution.
出处
《地质科学》
CAS
CSCD
北大核心
2014年第3期842-849,共8页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
中国石油化工集团公司油气成藏重点实验室开放基金项目(编号:33550007-12-ZC0613-0050)资助
关键词
镜质体反射率
热演化
热历史
Vitrinite reflectance, Thermal evolution, Thermal history
