摘要
以沉积学和高分辨率层序地层学理论为指导,在岩心、测井等多项资料的基础上,遵循从点—线—面的沉积微相分析原则,对辽河坳陷杜84块构造区馆陶组的沉积微相类型及特征进行了详细研究。研究表明:杜84块馆陶组属冲积扇,主要发育扇根和扇中两种亚相,共包含7种典型沉积微相。扇根亚相主要发育扇根泥石流、主河道和漫洪微相等3种沉积微相,扇中亚相主要包含扇中泥石流、辫状河道、辫流砂坝和漫流微相等4种沉积微相;物源主要以西部物源为主,从扇根到扇中,河道弯曲度和河道分叉程度增高;地层纵向上,从下部小层到上部小层具有扇根面积变小、漫流沉积变多的沉积特点。
Based on core,well logging and seismic data,and guided by high resolution sequence stratigraphy and classical sedimentology theory,the sedimentary microfacies types and characteristics of Guantao formation in Du-84 block of Liaohe depression were studied in detail according to the principle of point-line-plane sedimentary microfacies analysis.The study showed that Guantao formation in Du-84 block belongs to alluvial fan,which mainly develops fan-root and fan-tip subfacies.Seven kinds of typical sedimentary microfacies have been identified,of which fan-root debris flow,main channel and flood microfacies are developed in fan-root subfacies,and debris flow,braided channel,braided sand bar and overflow microfacies are developed in fan-middle subfacies.From the root to the middle of the fan,the bifurcation degree and the bending degree of the river course becomes higher.In each section of the stratum,the area of the fan root becomes smaller and the overflow deposits become more.
作者
马成龙
Ma Chenglong(Liaohe Oilfield Company Research Institute of Petroleum Exploration & Development,Panjin,Liaoning 124010,China)
出处
《非常规油气》
2019年第1期7-13,共7页
Unconventional Oil & Gas
基金
国家科技重大专项"渤海湾盆地辽河坳陷中深层稠油开发技术示范工程(二期)"(2011ZX05053)资助
关键词
辽河盆地
杜84块
沉积微相
冲积扇
馆陶组
沉积模式
Liaohe basin
Du-84 block
sedimentary microfacies
alluvial fan
Guantao formation
depositional model
