Abstract: The Permian is the important marine carbonate strata bearing oil and gas in south China.Its potential of oil and gas is very large, but little exploration was done.Except the Sichuan basin, no important brcakthroughs of oil and gas exploration have been made in marine carbonate strata in south China.On the basis of quantitative study and mapping of lithofacies paleogeography, the indepth study was made on the types, distribution and relation with sedimentary environments of source rocks and reservoir rocks of the Permian of the area, on the nature and distribution of regional and local capping beds, and especially on the oil and gas preservation units of the Permian formed alter many times of important tectonic movements.Five most favourable areas for oil and gas exploration were delineated out.They arc the Sichuan basin and Jianghan basin for oil and gas pools of concealed reefs as well as oil and gas pools of dolostones related with reefs and banks, the Yunnan-Guizhou area for coal bed gas, the Nanpanjiang area for isolated carbonate platforms in the deep water basin, the Shiwandashan basin areas with good preservation conditions, and the broad conjunction zone between the Jiangnan platform and basin.We hope that great breakthroughs of oil and gas exploration in the Permian and all other marine carbonate strata of south China will be made in the near future.

Key words: Permian, quantitative, lithofacies paleogeography, hydrocarbon source rocks, reservoir rocks, regional capping beds, oil-gas preservation units

摘要： 二叠系是中国南方重要的含油气海相碳酸盐岩地层,油气潜力很大,但勘探程度却很低。本文在定量岩相古地理研究及编图的基础上,对本区二叠系的烃源岩和储集岩的类型、分布及其与沉积环境的关系,对区域盖层和局部盖层的性质和分布,尤其是对二叠系经过多次重大构造变动后所形成的油气保存单元,进行了较深入的研究,并指出5个最有利的油气勘探地区,即四川盆地和江汉盆地的潜伏礁油气藏和与礁滩有关的白云岩油气藏、滇黔地区的煤层气、南盘江地区深水盆地中的孤立的碳酸盐岩台地、十万大山盆地中的保存条件较好的地区,以及广大的江南台盆交接地带。

关键词: 二叠系, 定量, 岩相古地理, 烃源岩, 储集岩, 区域盖层, 油气保存单元