黄河口凹陷南斜坡新生界流体包裹体特征及成藏期

Characteristics of Cenozoic fluid inclusions and accumulation period in southern slope of Huanghekou Sag

陈磊 2 徐长贵¹ 杨海风¹ 黄江波¹ 陈保柱¹

中海石油（中国）有限公司天津分公司，天津 300452 中国石油大学（华东）地球科学与技术学院，山东 青岛 266580）

Tianjin Branch of CNOOC Ltd., Tianjin 300452, China School of Geosciences, China University of Petroleum, Qingdao 266580, China)

利用流体包裹体的分析测试技术与研究方法，对黄河口凹陷南斜坡火山岩发育区新生界碎屑岩储层流体包裹体进行了显微荧光、均一化温度、盐度及丰度等分析测试，定量确定了油气藏的成藏期次和油气充注时间。结果表明：储层流体包裹体主要包括盐水包裹体、油气包裹体2种类型，油气包裹体以绿色、黄色及蓝色荧光为主；新近系和古近系盐水包裹体的均一化温度分别为90～120 ℃，60～90 ℃，具有单峰、窄主频的特点，盐度数据和包裹体丰度具有双低特点；古近系和新近系油气成藏期为3.0 Ma以来，表现出晚期快速充注、同期幕式成藏的特点，具有“垂向贯通式”成藏模式。

By analyzing microscopic fluorescence, homogenization temperature, salinity and GOI for fluid inclusions, the hydrocarbon accumulation stages were studied quantitatively in the southern slope of Huanghekou Sag in Cenozoic. The results show that the reservoir includes salt-water inclusion and hydrocarbon inclusion with the green, yellow and blue fluorescences. The salt-water inclusions show the characteristics of low salinity and low GOI, and one peak and narrow frequency of the homogenization temperature at 90￣120 ℃ and 60￣90 ℃ in Paleogene and Neogene. The main hydrocarbon accumulation period is 3 Ma with vertical-direction accumulation model, which shows the characteristics of late-stage rapid and contemporaneous episodic accumulation.

10.6056/dkyqt201701003