摘要
渤海湾盆地沙垒田凸起与围区凹陷形成了典型的陆相断陷湖盆源-汇系统.基于钻井、地震、岩心及储层分析资料,刻画了沙垒田凸起及围区源-汇系统要素特征,并将源-汇系统分为断裂陡坡型、断裂缓坡型、斜坡型及断槽型4大类.不同类型源-汇系统的物源供给控制相应的沉积体系发育,从而影响其储层的成岩作用与物性特征.研究表明,沙垒田凸起围区凹陷的储层发育受源-汇系统要素耦合与成岩作用的共同控制,其中断裂缓坡带由于源区高差与汇水面积大,沿断裂坡折带分布的沉积体系与砂体规模大、范围广,砂岩成分、结构成熟度较高,埋深浅、机械压实作用较弱,次生孔隙发育,为优质储层发育的有利区,而断裂陡坡型、斜坡型及断槽源-汇系统次之.
The Shaleitian uplift and its surrounding areas in the Bohai bay basin constitute a typical Source-to-Sink（S2 S）system in terrestrial rift basin.Based on the data of drilling,seismic,core,and reservoir analysis,this paper illustrates element characteristics of S2 Ssystems in the Shaleitian uplift and its surrounding areas.The S2 Ssystems are classified into four types,namely,faulted-steep-slope,faulted-gentle-slope,gentle-slope,and faulted-trough.Different S2 Ssystems controlled various depositional systems,and subsequently influenced their reservoir diagenesis and properties.Research results indicate that reservoir development in sags around the Shaleitian uplift was influenced both by element coupling of the S2 Ssystems and diagenesis.The faulted-gentle-slope was characterized by high elevation of source rocks and catchment area,which developed large scale of depositional systems and sandbodies along the fault break zones.The sandstone in this kind of S2 Ssystems was high quality reservoirs with high maturity of component and texture,shallow buried depth,weak mechanical compaction,and abundant secondary porosity.However,other S2 Ssystems including faulted-steep-slope,gentle-slope,and faulted-trough developed less high quality reservoirs.
出处
《地球科学（中国地质大学学报）》
EI
CSCD
北大核心
2017年第11期1994-2009,共16页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金项目(No.41272133)
博士后基金项目(No.2015M581269)
国家科技重大专项(No.2016ZX05024-002-002)
关键词
源-汇系统类型
成岩作用
储层分类
沙垒田凸起
石油地质
沉积.
source-to-sink system
diagenesis
reservoir classification
Shaleitian uplift
petroleum geology
sedimentary.
