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中国晚元古代至三叠纪海相沉积面积约250万平方公里,厚度一般在3000米以上,局部地区可厚达数万米。在这些分布广阔而厚度巨大的海相沉积中,含丰富的有机质,发育有多层组油气源岩,为我国丰富的油气资源的形成,奠定了一定的物质基础。 作者从沉积相与油气关系入手,以编制的中国晚元古代至三叠纪各期海域沉积相图和海陆变迁图(1:1000万)为基础,探讨各地史时期海相生油岩的沉积特征、发育与展布,进而用体积法分别分地区、分相带估算了晚元古代至三叠纪海相沉积生油潜力和资源量,为我国油气资源的普查、勘探提供参考。
The sedimentary area of marine sediments in China from the Late Proterozoic to Triassic is about 2.5 million km 2, with a thickness of more than 3000 meters. Some areas can be as thick as tens of thousands of meters. In these widely distributed and thick marine sediments, rich in organic matter and development of multi-layered hydrocarbon source rocks have laid a solid material foundation for the formation of abundant oil and gas resources in our country. Based on the relationship between sedimentary facies and oil and gas, based on the sedimentary facies maps and the sea-land change maps (1: 10 million) dating from the Late Proterozoic to Triassic in China, the authors discuss the sedimentary characteristics of marine-derived oil-bearing rocks in various historical periods , Development and distribution, and then by volume method were sub-regional and sub-phase zone estimated the late Proterozoic to Triassic marine sedimentary oil potential and resources, for China’s oil and gas resources survey, provide a reference.