摘要
通过岩心、钻井和地质资料研究，发现松辽盆地东北部泉三、四段的沉积作用符合于三角洲平原相模式，并划分了１２种微相。进而提出古河流趋向分析法，勾绘出多级古河道带，发现了泉头期的古松花江，系统的沉积环境与河流趋向图表明，侵蚀基面（湖水面）的高低，直接影响河流规模，而深断裂和断块活动则控制河流位置与迁移。沉积系统的配置表明，泉三、四期，松辽盆地北部为古嫩江、古松花江及其支流形成的冲积一湖积平原。古松花江平行并靠近今日松花江延伸，经王江盆地而汇入古黑龙江。这一系统的发现，对石油勘探布置和油气田开发有重要意义。
By an analysis of drilling seismic and coredata, sedimentary processes of the 3rd and 4thmember of Cretaceous Quantou formation in the north-eastern part of Songliao basin can bedescribed with a deIta-plain facies model and 12 microfacies have been divided.An approachfor paleo-channel trend analysis was proposed, which leads to delineating the multiple-orderpaleochannel belts and discovered the paleo Songhua River during Quantuo period. System-atic diagrams of sedimentary environment and river trend have revealed that the base level(lake level) directly affected the paleochannel size while the deep faults and fault-block activ-ities controlled the position and shift of paleo rivers respectively. Disposition of the sedimen-tary systems indicated that during 3rd and 4th stage of Quantou period the northern Songliaobasin might be an alluvial-lacustrine plain formed by the deposition of paleo-Nen,paleo-Songhua Rivers and their tributaries and distributaries. The paleo-Songhua River stretchedparallel with the present Songhua River. It might wind its way through Sanjiang basin andjoin into paleo-Heilong River. This discovery could be of significant importance for the oil-gas exploration and development in Songliao basin and its adjacent areas.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1995年第4期32-39,共8页
Acta Petrolei Sinica
关键词
古河流
构造运动
沉积相
松辽盆地
油气勘探
sedimentary microfacies paleochannel tectonic movement paleocl-mate control
