塔里木盆地塔中Ⅰ号坡折带奥陶系油气田是我国第一个以礁滩体为储集体的大油气田。该油气田不同井的测试产量和气油比差异较大,油气性质复杂,既有正常油也有凝析油,天然气中普遍含有H2S,非烃气含量在不同井区变化大。油气藏研究表明,北部为富气、南部为富油,不同性质的油和气分段性分布,油气主要来源于寒武系,喜马拉雅运动期的大规模气侵和良好的保存条件是形成奥陶系大油气田的主要原因。 Tarim Basin Tarim Ⅰ slope break Ordovician oil and gas field is China’s first reef-bank body as a reservoir of large oil and gas fields. The production and gas-oil ratios of different wells in this oil and gas field differ greatly. The nature of oil and gas is complex. Both normal oil and condensate oil are present. Natural gas generally contains H2S, and the non-hydrocarbon gas content varies greatly in different well areas. Oil and gas reservoir research shows that the northern part is rich and the southern part is oil rich. Oil and gas with different properties are distributed in sections and the oil and gas are mainly derived from the Cambrian. During the Himalayan campaign, large-scale gas invasion and good preservation conditions are the formation of Ordovician The main reason for the large oil and gas fields.