粘土矿物的热模拟研究

THERMAL MODELLING RESEARCH OF CLAY MINERALS

周国清

Zhou Guoqing

地矿部石油地质中心实验室 无锡 214151

Central Lab of Petroleum Geology, MGMR

本文介绍了粘土矿物的3个热模拟实验方法与结果;有常压下不同加热温度的实验;不同加热时间的实验;高压碱性介质下不同加热温度实验。讨论了粘土矿物受温度的影响、受热持续时间的影响、粘土脱水与烃类运移的关系及粘土矿物在高温高压下的变化。认为温度和持续时间是粘土矿物成岩转变的互相补偿的重要条件,压力是次要因素。蒙脱石向伊利石转化有利于孔隙度和渗透率的增大。

In this paper,the method and results of three thermal modelling experiments on clay minerals are introduced; the one under normal pressure and varing heating temperature.the one with different heating time and the one under high pressure and varing heating temperature in alkaline mediums. Besides,the effects of temperature and sustained heating time on clay minerals,the relation of clay dehydration to hydrocarbon migration and the changes of clay minerals under high temperature and pressure are also discussed. The author considers that temperature and sustained time are the important conditions of mutual compensation during the diagenetic transition of clay minerals, and the pressure is a secondary factor. The conversion of montmorillonite to illite is advantageous to the increase of porosity and permeability.

https://doi.org/10.11781/sysydz199503286