摘要
为了深入认识沉积物源的位置及古流向,通过矿物成分、岩屑特征、重矿物组合及分布、砂体展布特征等分析,对饶阳凹陷馆陶组的物源方向进行了系统研究。结果表明,饶阳凹陷新近系馆陶组沉积时期,盆地存在4个相对独立的物源及古水流体系:分别为来源于北或北东部物源自北向南或北东—南西流向的水系,来源于西部物源、西南—北东向展布的水系,源于西部物源、东西向展布的水系,源于南部或西南部物源、西南—北东向展布的水系。新近系的河流流向以南北向、沿盆地长轴方向为主,盆地内砂体具有南北向带状展布的特征;中部留路地区距离物源区相对较远、盖层较发育、储盖组合条件好,为饶阳凹陷新近系油气聚集的有利区带。
For determining the location of provenance and direction of paleo-drainages,we investigated this key aspect of Guantao Formation in Raoyang depression by combining mineral composition,lithic fragments characteristics,heavy mineral associations and distribution,and sand body distribution.The results indicate that,during the Early Neogene,there were four independent paleo-drainage systems： flowing from north and northeast uplift to the south and the southwest,from west uplift to the northeast,from south and southwest uplift to the northeast,and from west uplift to the east.The main system was N-S-oriented along long axis of the depression,depositing N-S-oriented sandstone belts.Finally,the central part of the depression（Liulu area） is far away from source area to accumulate high-quality sandstone reservoirs and thick mudstone seal rocks,and is the most favorable area of exploration for oil and gas.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2012年第2期321-326,334,共7页
Journal of Jilin University：Earth Science Edition
基金
国家科技重大专项项目(2011ZX05008-004-52)
关键词
饶阳凹陷
新近系
物源
沉积环境
沉积
Raoyang depression
Neogene
provenance
sedimentary environments
sedimentation
