近十多年来,我们在进行我国陆相油田沉积相研究过程中,发现我国许多陆相油田的含油地层,大多为古代断陷湖相沉积。为结合我国东部中、新生代陆相油田的勘探和开发,自1978年起,中国科学院南京地理研究所湖泊研究室开展了对云南现代断陷湖泊沉积相的研究。沉积相具有双重性:既反映了沉积物的沉积特征;也反映了沉积物沉积时的沉积环境。沉积物的特征包括沉积物的物理特征,化学特征和生物特征。生物对环境变化反映最为灵 In the past ten years or so, during the research on the sedimentary facies of continental oilfield in China, we found that the oil-bearing strata of many continental oilfields in China are mostly lacustrine sediments of ancient faults. In order to combine the exploration and development of the Mesozoic and Cenozoic terrestrial oilfields in the eastern part of China, since 1978, the research institute of Nanjing Institute of Geography, Chinese Academy of Sciences carried out the research on the sedimentary facies of the modern rift lakes in Yunnan Province. Sedimentary facies is duality: it reflects not only the depositional characteristics of the sediments but also the sedimentary environment during sediment deposition. Features of sediments include the physical, chemical and biological characteristics of sediments. Creatures reflect the most spiritual changes in the environment