关键词: 乌尔逊凹陷, 苏仁诺尔断裂, 垂向封闭, 时空分布, 断面压力, 泥质含量, 油气聚集

Abstract: The vertical seal mechanism,influencing factors and active history of Shurennouer Fault were studied.The time-space distribution of vertical seal in Shurennouer Fault was analyzed,according to the fault plane pressure and mudstone content of fault zone.The results show that the vertical seal of Shurennouer Fault formed in the southwest section from 830 meter to 1800 meter in depth and in the northeast section from 640 meter to 1580 meter in depth.The vertical sealing property of the K₁d₂ formation in the northeast section of shurennouer Fault is bad,and that of the K₁d₁ formation and the K₁d₂ formation in the southwest section of Shurnnouer Fault are good. The K₁n₂ formation in the southern part of I 340-line is badly sealed,and the formations in the other parts are sealed well.The K₁n₁ formation of Shurennouer Fault from I 360-line to I 420-line and in the western part of X848-line are well sealed,and the formations in the other parts are badly sealed.The relationship between time-space distribution of vertical seal in Shurennouer Fault and oil-gas accumulation as well as the expulsion hydrocarbon history of source rock shows that Shurennouer Fault plays following two roles for oil-gas accumulation.The vertical distribution difference of vertical seal in Shurennouer Fault determined the distribution difference of oil-gas accumulation in the horizon.The plane-time distribution difference of vertical seal in Shurennouer Fault determined the distribution difference of oil-gas accumulation along Shurennouer Fault.

Key words: Wuerxun Depression, Shurennouer Fault, vertical seal, time-space distribution, fault plane pressure, mudstone content, oil-gas accumulation