黏土矿物在石油初次运移中的作用研究

从黏土矿物的结构、成岩过程中脱水转化条件以及脱水转化阶段等几个方面讨论了不同转化类型的黏土矿物在石油初次运移中的作用.研究结果表明:并不是所有的黏土矿物都对油气的初次运移起作用,不同的黏土矿物对油气初次运移的作用也不同,其中蒙皂石的脱水、转化对油气初次运移的作用最为显著;黏土矿物的脱水转化是在温度、压力、时间等因素的综合作用下发生的,这就决定了黏土矿物脱水转化的不确定性.只有那些与油气的生成阶段相匹配的转化才会对油气的初次运移产生作用,而早于或晚于油气生成阶段的转化对油气初次运移的作用甚微或没有作用.

Effect of clay minerals on initial migration of petroleum

The effects of different transformation types of clay minerals on initial migration of petroleum are discussed in the texture of the clay minerals, and their dehydration conditions and stages in diagenesis. The research result in the paper shows that, (1) all the clay minerals do not play a role in initial petroleum migration, different clay minerals play different roles, and the dehydration of smectite has the greatest effect on initial migration of petroleum; (2) the dehydration of clay minerals is the result of the common action of temperature, pressure, time, and so on, which determines the uncertainty of the dehydration. Only the dehydrations matching with petroleum generation can affect initial migration of petroleum, and those happening early or late have little or no effect.