中国古生代大型油气田成藏条件及勘探方向

继1984年塔里木盆地北部钻探沙参2井实现我国古生代海相油气首次重大突破后，分别又在塔里木、华北、扬子、准噶尔等地块上发现了一批大中型油气田。为此，从烃源岩、储集层（体）、生储盖组合、古隆起、古斜坡控油气、多期成藏、多期充注及封盖条件等方面综合研究了我国古生代大油气田成藏条件，并指出了下一步勘探方向，以期在我国地质构造十分复杂的古生代地层中发现更多的大型油气田。

RESERVOIRING CONDITIONS AND EXPLORATION DIRECTION FOR LARGE-SCALE PALEOZOIC OIL AND GAS FIELDS IN CHINA

Since the important breakthrough was made on the theory of Paleozoic marine origin of oil and gas in China by the exploratory well Shashen 2 drilled in the northern Tarim Basin in 1982, many large or middle scale oil and gas fields have been discovered respectively in the Tarim Basin, North China Plain, the Yangtze River, and the Zhunger Basin, and so on. Therefore, this paper studied completely on the accumulating condition of large Paleozoic oil and gas reservoirs from many aspects such as hydrocarbon source rocks, reservoir bodies, seal cap reservoirs assemblage, paleohighs, paleoslope controlling oil and gas, multi period reservoiring, multi stage charge, and sealing conditions, etc. Then this paper pointed out the next exploration direction for oil and gas discovery to expect more and more large scale oil and gas fields to be discovered in those extremely complicated Paleozoic formations in China.