沉积盆地油气形成过程中有机-无机相互作用

沉积盆地分散有机质向油气演化过程中会遇到一系列无机组分,如水、粘土矿物、无机盐和金属元素等,部分无机组分可以作为反应物或催化剂参与有机质成烃演化过程;石油作为一种还原态物质,运移和聚集在无机矿物构成的空间体系中,当油气遇到具有氧化性的矿物时,能与它们发生反应,使原油的物理性质和化学组成发生改变,同时许多有机―无机作用产物还能改变储层的物性。指出虽然一些有机-无机反应的机理还不为人们所了解,但它们对油气形成和成藏都有非常重要的影响;深入开展油气形成过程中有机-无机作用的研究,可能会对未来油气勘探和资源评价等方面产生重大影响。 rn

ORGANIC-INORGANIC INTERACTIONS DURING THE FORMATION OF OILS IN SEDIMENTARY BASIN

When petroleum is formed from disperse organic matter,it will encounter a series of inorganic sedimentary components,such as,water,clay minerals,inorganic salts and some metal elements etc.Inorganic components can serve as reactant or catalyst,and participate in the processes of the formation of petroleum.Petroleum,reductive state matter in geological system,migrate and accumulate in spatial system formed by inorganic minerals,when it encounters mineral oxidants(iron-bearing minerals),which can react with inorganic components,moreover,petroleum physical properties and chemical compositions have been changed during this process,and the reservoir properties of a rock have also probably been modified by products derived from the reactions between organic and inorganic matter. Although some reaction mechanisms of organic-inorganic interactions are still not known by geologists,they have important affect on the petroleum formation and accumulation,studies on this fact will enhance our ability to predict the occurrence of petroleum and evaluation of petroleum sources.