摘要
通过对松辽盆地南部白垩系泉头组—嫩江组层序地层分析揭示,青二段顶至青三段底及嫩一、二段为湖域范围最广的两个时期,分别与两个二级旋回的凝缩段(CS1、CS2)相当,也是松辽盆地南部两套区域性烃源岩和区域性盖层发育的时期。这两套区域性盖层将泉三、四段至嫩江组油层自然地划分为上、中、下3套有成因联系的油气成藏组合:泉三、四段至青一、二段为下部成藏组合,青三段至姚家组为中部成藏组合,嫩江组为上部成藏组合,同一成藏组合具共同的区域性盖层。同传统年代划分方案相比,新的划分方案以层序地层学为基础,以成藏控制因素———区域性盖层为划分依据,这对松辽盆地南部油气藏的进一步勘探起着重要的作用。
The analyses on the sequences stratigraphy from Quantou Fm. to Nenjiang Fm. of the Cretaceous period in the southern Songliao basin showed that the top of Qn2 to the bottom of Qn3and N1-2 were the two maximum lacustrine flooding periods which respectively corresponded to the two condensed sections (CS1/CS2) of the secondary cycle and were also the developing times of regional source rocks and caps in southern Songliao basin. These two regional caps naturally divided into three sets of hydrocarbon accumulation assemblages genetically linked. The new classification scheme is that the lower accumulation assemblage composed of Q3-4 and Qn1-2, the middle accumulation assemblage composed of Qn3 and Yaojia Fm. (Y) and the upper accumulation assemblage composed of Nenjiang Fm. The same hydrocarbon assemblages have the same regional caps. Comparison with the traditional chronological boundary classification scheme, the new classification scheme is based on sequence stratigraphy and hydrocarbon assemblages controlling factor regional caps. The new classification scheme will play a more important role in the further oil-gas exploration in southern Songliao basin.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2003年第4期469-473,共5页
Journal of Jilin University：Earth Science Edition
基金
中国石油天然气股份公司资助项目(020122-1)
关键词
松辽盆地
层序地层学
区域性盖层
油气成藏组合
泉头组-嫩江组
southern Songliao basin
sequence stratigraphy
regional caps
genesis assemblage of oil and gas reservoir
