摘要
储层粘土矿物中自生伊利石K-Ar年龄测定表明:松辽盆地齐家—古龙凹陷扶杨油层油气充注时间大致分为3个阶段,70.75～72.32 Ma,相当于嫩江组沉积末期;40.5～51.3 Ma,相当于依安组沉积早期;34.7～37.5 Ma,相当于依安组沉积末期.分析油藏形成时间与构造抬升的关系认为:受早期构造抬升的控制,扶杨油层在早期构造抬升的晚期快速成藏;由于晚期构造运动持续时间较长,为40.5～51.3 Ma,发育超压系统的上覆青一段泥岩由于压力超过泥岩承受的极限,导致超压的破裂,形成第二期油气成藏;晚期构造抬升的末期,形成最后一期油气充注.
The K-Ar dating of the authigenic illite in clay minerals suggested that there had been three stages of hydrocarbon injections in the Fuyang Reservoir, Songliao Basin, and the K-At ages of the three stages were 70.75～72.32 Ma （in the end of K1n）, 40.5～51.3 Ma （E1^1） and 34.7～37.5 Ma （E1^2） respectively. Therefore, the relationship between the timing of oil entrapment and the tectonic upwellings could be revealed： firstly, the Fuyang Reservoir was rapidly formed at the end of early tectonic upwelling; secondly, due to the later continuous tectonic movement, the mudstone of the Qingshangkou Formation was fissured under the high upper-pressure, and the second stage oil/gas reservoir was formed; thirdly, the last stage oil injection finished at the end of late tectonic upwelling during 34.7～37.5 Ma.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第5期26-29,共4页
Journal of Lanzhou University(Natural Sciences)
基金
国家重点基础研究发展计划项目(2003CB214607)
教育部长江学者和创新团队发展计划项目(IRT0559)资助．
