摘要
对90块砂岩流体包裹体样品系统分析表明,塔里木盆地沙雅隆起下白垩统存在大量沥青和烃类包裹体,这些证据可以追踪盆地内油气的运移聚集和成藏过程。利用荧光观察确定包裹体类型主要有4种:气液两相油包裹体;纯气相包裹体;油-沥青两相包裹体;盐水包裹体。依据油包裹体荧光性质(荧光颜色、主峰波长和QF535),结合盐水包裹体均一温度-埋藏史投影方法,确定雅沙隆起下白垩统有1期3幕油充注:第1幕12～5 Ma、第2幕5～2 Ma、第3幕2～0Ma;通过油包裹体与油源层原油的荧光光谱对比,判定第1幕和第2幕为陆相油源充注,第3幕为海相油源充注。海相充注的油成熟度较陆相低,充注时间晚。成藏期为喜马拉雅中—晚期,且表现出连续、快速充注的特点。
Lots of hydrocarbon inclusions and bitumen have been measured in 90 sandstone samples from the Lower Cretaceous of Shaya uplift, Tarim Basin, and the evidence from these measurements can be used to trace the hydrocarbon migration and accumula- tion history of the basin. Four types of inclusions were determined in fluorescence observation, i.e. gas-liquid biphase oil inclusions, pure gas inclusions, oil-asphalt inclusions and aqueous inclusions. According to fluorescence properties（fluorescent colors, ）,max and QF535） of the oil inclusion and combined with the employment of homogenization temperature of aqueous inclusions projected on a burial history diagram, three oil charging events were determined, and they took place in 12-5 Ma, 5-2 Ma and 2-0 Ma, respec- tively. By the fluorescence spectral comparison of the oil inclusion with the crude oil from oil-prone source beds, it could be con- cluded that the first and the second charging oils originated from terrigeneous source rocks while the third charging oil was de- rived from marine ones. The marine oil is characterized by a lower maturity and later charging time compared with the continental oil. Its hydrocarbon accumulation occurred mainly during the middle-late Himalayan period, and is characterized by continuous and rapid charging.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2013年第1期12-21,共10页
Acta Petrolei Sinica
基金
国家重点基础研究发展计划(973)项目(2012CB214804)资助
关键词
流体包裹体
油气充注期次和时期
多源油气藏
下白垩统
沙雅隆起
fluid inclusion
hydrocarbon charging event and age
multi-source reservoir
Lower Cretaceous
Shaya uplift
