一、引言 “石油是从何处、何时,如何形成的?”这个问题,是目前世界上再次提出的一个重要研究课题。 从有机地球化学角度开展石油形成理论的研究,近10年内取得了很大的进展。根据Smith(1952)的研究认为,在近代海底沉积物中发现了一系列烃类,这就是石油在有机物沉积后的初期开始生成的有力证据。但 I. Introduction The introduction of “Where, when and how oil is formed?” Is an important research topic once again put forward in the world. From the perspective of organic geochemistry to carry out the theory of oil formation, in the past 10 years made great progress. According to a study by Smith (1952), a series of hydrocarbons were found in modern seafloor sediments, which is a strong evidence that petroleum started to form after the initial deposition of organic matter. but